Elimination method using multiplication
1. x+3y=6 and x+2y=5
2. 3x-y=2 and x+2y=3
3. 4x X 5y=6 and 6x-7y=-20
4. 4x+2y=8 and 16x-y=14

Answers

Answer 1

Answer:

1. x=3, y=1

2. x=1, y= 1

3.( i dont know what the first expression means, are you multiplying 4x and 5y or adding it?)

4. x=1 , y=2

Step-by-step explanation:

This is simple simultaneous equations. You need to eliminate one element in each of the two equations, either y or x and the calculate for the other value.


Related Questions

hey guys! i would be a HUGE favor if you could help me out with this problem. thx so much, it means alot!! <3

Answers

Answer:

They do have the same solution

Step-by-step explanation:

In the first problem, you subtract 3/4 first. Next you would divide by 2/3. When you divide 7 1/4 by 2/3, you get 87/8. The only step in the second problem is to divide 87 by 8 (87/8).

You buy a classic comic book for $45. You want to resell it and make a $15 profit. What percent do you need to markup the comic book?

Answers

33% profit

ratio: 15:45

That can be simplified into 1:3

The price is increased by $15, which is 1/3 of the original $45.

1/3 as a percentage is about 33%.

What is the volume of a rectangular prism with a length of 2 inches, a width of an inch & is a quarter of an inch in height?

Answers

Answer:

= 1/2 inches ^3

Step-by-step explanation:

The volume of a prism

V = l*w*h

  = 2 * 1 *1/4

  = 1/2 inches ^3

Answer:

[tex] = \frac{1}{2} {in}^{3} [/tex]

Step-by-step explanation:

[tex]v = whl \\ = 1 \times \frac{1}{4} \times 2 \\ = \frac{2}{4} \\ = \frac{1}{2} {in}^{3} [/tex]

hope this helps

brainliest appreciated

good luck! have a nice day!

Factorise this expression as fully as possible
4x^2+x^3

Answers

Answer:

x^2(4+x)

Step-by-step explanation:

you have to factor out x^2 off both equations since that's the only thing that you can divide off the equations

Given a school supply store sells pencils for $2, pens for $4, and markers for $5. Write an expression for the total cost of 3 pencils, 2 pens, and 3 markers

Answers

Answer: 29

Step-by-step explanation:

3x2= 6

4x2=8

3x5=15

6+8+15= 29

hoped I helped you a bit! Good luck! :)

Which relation is a function? A. (1, 0), (3, 0), (1, 1), (3, 1) (1, 3) B. (1, 1), (2, 2), (3, 3), (4, 4), (5, 8) C. (2, 7), (6, 5), (4, 4), (3, 3), (2, 1) D. (9, −3), (9, 3), (4, −2), (4, 2), (0, 0)

Answers

Answer:

b is the answer

Step-by-step explanation:

i checked if inputs repeated in all the string of answers

Answer:

b

Step-by-step explanation:

Paint costs $12 per litre and can only be purchased in a full number of litres. One litre of paint covers an area of 10m2. A rectangular wall is 6.5 long and 3m high and needs two coats of paint. What will be the cost of paint for the wall?

Answers

Answer:

$48

Step-by-step explanation:

The rectangular wall is 6.5 m long and 3 m high and needs two coats of paint. This means the wall will be painted twice.

First, we find the area of the wall. The area of a rectangle is given as:

A = L * B

where L = length and B = breadth

Therefore, the area of the wall is:

[tex]A = 6.5 * 3 = 19.5 m^2[/tex]

One litre of paint covers an area of [tex]10m^2[/tex].

The paint can only be purchased in a full number of litres.

Therefore, let us find how many litres it will take to paint the wall once:

[tex]10m^2[/tex] = 1 litre

[tex]19.5 m^2[/tex] = 19.5 / 10 = 1.95 litres

Since the paint can only be bought in full number of litres, we approximate 1.95 litres to whole number, that is 2 litres.

2 litres is needed to paint the wall once.

Therefore, we need double of that to paint the wall twice, that is:

2 * 2 = 4 litres

Paint costs $12 per litre, therefore, the price for 4 litres is:

4 * 12 = $48

The cost of paint for the wall is $48.

Write nine minus the quotient of two and a number x as a expression variable

Answers

Answer:

9-(2/x)

Step-by-step explanation:

a knife is 3 times the cost of spoon
9 spoons and 12 knives cost £82.80

Answers

Answer:

5 .52

Step-by-step explanation:

do the math. aaaaaaaaaaaaaaaaaaaannnnnnnnnnnnnnnnnddddddd this is the best appppp evvvvver

There are 81 women teachers at Russell High. If 45% of the teachers in the school are women, how many teachers are there at Russell High?

Answers

Answer:

180 teachers

Step-by-step explanation:

In this case, we know the value corresponding to 45% of female teachers which is 81, therefore, to find the total it would be:

% teachers    #teachers

       45                 81

       100                 x

we apply the rule of three:

x = 100 * 81/45

x = 180

which means that there are a total of 180 teachers at Russell High

A bag contain 8 blue balls, 7 green balls and 5 red balls.What is the probability that the ball is red?

Answers

Answer:

A bag contains:

8 blue balls.

7 green balls.

5 red balls.

The probability that the ball is red would be:

P = Red balls/Total balls = 5/(5+7+8) = 5/20 = 1/4 =0.25

Hope this helps!

:)

Answer:

0.25

Step-by-step explanation:

Total balls: 8 + 7 + 5 = 20

Red balls: 5

P(red) = 5/20 = 0.25

Which expression is equivalent?

7 − 4(2x − 3)
A) 8x + 5
B) 8x − 19
C) −8x + 5
D) −8x + 19

Answers

D is the answer -8x + 19

Answer:

this is so overdue

Step-by-step explanation:

A survey in one middle school showed that 3 out of 5 students enjoy biking on the weekends. Predict how many out of the 972 students in the school would say they enjoy biking on the weekends.

Answers

583.2 students will enjoy the day! You have to cross multiply so the 3x972=5xE which then equals 2916=5E which equals the answer

Melissa needs to wrap a gift box that is shaped like a rectangular prism. The length is 6 inches, the width is 6 inches and the height is 8 inches. How much wrapping paper does she need to cover the whole box

Answers

Answer:

A=264

Step-by-step explanation:

Correct answers only!

To the nearest cent, how much interest will he earn in 2 years?

Use the formula B = p(1 + r)t, where B is the balance (final amount), p is the principal (starting amount), r is the interest rate expressed as a decimal, and t is the time in years.

Answers

Answer: $8.40

Step-by-step explanation:

The problem states that Scott has deposited $40 and is earning 10% interest, annually. It asks how much interest he will earn in 2 years to the nearest cent.

First, the formula given is B=p(1+r)^t. Since Scott deposits $40, 40 would be the starting amount, p.

B=40(1+r)^t

R is the interest rate: 10%. We plug in 0.10 instead of 10% because r is the interest rate, not the percentage.

B=40(1+0.10)^t

T is time: 2 years

B=40(1+0.10)^2

Now that we have the equation filled out, we plug this into a calculator.

48.4=40(1+0.10)^2

We know that the final amount is $48.40. Unfortunately, the question is asking how much interest is earned. To find that, you would subtract the Final-Initial to get the interest.

48.4-40=8.4

Find the perimeter and the area of the polygon with the given vertices.

S (3,0), T (3,9), U (8,9), V (8,0)

Answers

Answer: area =45   perimeter=28

Step-by-step explanation:    height is 9, length is 5   5x9 =45

9+9+5+5= 28

The area of a circle is 4π x 2 + 12πx + 9π.
a. What is an expression for the radius of the circle?
b. What is the least possible integer value of x for the circle to exist? Explain.

Answers

Answer:B D

Step-by-step explanation:

I just got it right

Pleaaase help me out here im being timed!!

Really appreciate it if u did thank u.

Answers

The answer is 180. Or C.A triangle’s full angle is 180 so the answer is 180

Find the value of the variables for each set or similar figures

Answers

Answer:

3

Step-by-step explanation:

Can someone help me with this

Answers

Answer:

30.5 and 46

Step-by-step explanation:

The minimum is 30.5 and the maximum is 46

can someone help? 25 points

Answers

Answer:

8 hours

Step-by-step explanation:

HE has to pay $7 an hour.

8*7=56

He has a descount of $3, so

$56-$3=$53.

Which is the exat amount of money that Tony has.

Answer:

The answer is 46

Because he wants to spend less so you would do

7x7=49

He could only rent the boat for 7 hours because that would be less than 53$

Now you do 49-3=46

Because he had a discount

So the answer is 46

Step-by-step explanation:

Hope this helped!

If an event has an 80% probability of happening, which word is the best description?
(1 Point)
Certain
Likely or Probable
Unlikely or Unprobable
Impossible

Answers

Answer:

likely or probable

Step-by-step explanation:

hhhgfd

Likely or probable

factor the polynomial 8x-2

Answers

Answer:

[tex]2(4x-1)[/tex]

Step-by-step explanation:

you divide by 2 and simplify. idk how else to explain it....

Answer:

2(4x-1)

Step-by-step explanation:

Factor out a 2

Park View Apartments has 2 buildings. Each building has 3 floors. Each floor has
16 windows. What is the total number of windows in the Park View Apartment
buildings?
What Is The Answer

Answers

Step-by-step explanation:

2 Buildings : 3 Floors Each : 16 Windows per Floor

Multiply 2 and 3 to get the total amount of floors.

2 times 3 equals 6

Then, multiply 6 and 16 to get the total amount of windows in the Park View Buildings.

6 times 16 equals 96

Therefore, there are 96 windows in total or 48 windows per building

A town has population of 5000 and grows 3.5 percent every year. What will be the population after 15 years , to the nearest whole number?

Answers

Answer:

After 15 years the population will be 7,625

Step-by-step explanation:

3.5% of 5,000 = 175

175 x 15 = 2625

2625 + 5,000 = 7625

The population after 15 years should be  8,376

Calculation of the population:

Since the population is 5,000 and it grows 3.5 years and the time period is 15 years

So, the population after 15 years is

[tex]= 5,000 \times (1 + 3.5\%)^{15}\\\\[/tex]

= 8,376

Therefore, we can conclude that The population after 15 years should be  8,376

Learn more about population here: https://brainly.com/question/24309536

What is the equation

Answers

Answer:

76

Step-by-step explanation:

-4x + 104 = -200

-4x = -304

4x = 304

x=76

I have a test to do today and I need help with it, i don't understand any of it. I will copy and paste it here: IQ scores are normally distributed with a mean of 100 and standard deviation of 15. 1) About what percent of people would have IQ between 85 and 115? 2) About what percent of people would have IQ between 70 and 130? 3) About what percent of people would have IQ above 130? 4) If a school had 255 students, about how many would you expect to have an IQ less than 70? 5) If a school had 1531 students, about how many would you expect to have an IQ greater than 145? 6) If a school has 354 students with an IQ between 100 and 130, about how many students does the whole school have?

Answers

Answer:

68%

Step-by-step explanation:

IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. About 68% of individuals have IQ scores in the interval 100 ± 1 ( 15 ) = [ 85 , 115 ] .

Solve the following system of equations {4x−6y=105x+6y=−55

Answers

Answer:

31557778998765432

Step-by-step explanation:

is it impossible

4) Gina pays $0.50 each time she plays a carnival game. The game is on a spinner with 12 equal-sized sections, labeled 1 through 12. She wins a prize if the pointer lands on 3, 5, or 7. If Gina spends $4 playing the game, predict the number of prizes she can expect to win.

Answers

Answer: 2 prices

Step-by-step explanation:

Price per play = $0.50

Total amount incurred by Gina in playing =$4

Therefore, total games played :

$4 ÷ $0.5 = 8 games.

Total points on spinner = (1,2,3,4,5,6,7,8,9,10,11,12)

Required for winning = (3, 5, 7)

Probability of winning:

P(WIN) = ( required outcome / Total possible outcome)

P(win) = 3/12 = 1/4

Therefore, the number of prices she can expect to win is (1/4) × number of games (8)

(1/4) × (8) = 2

what is the independent value

Answers

Independent variable – the variable that is altered during a scientific experiment.

Dependent variable – the variable being tested or measured during a scientific experiment.

Controlled variable – a variable that is kept the same during a scientific experiment.
Other Questions
PLZ HELP, I'LL GIVE EXTRA POINTS1. Which of the following can reduce biodiversity within a natural environment?A.Giant kangaroo rats enrich the soil for plants with their piles of grass clippings in the California grasslands.B.Grasslands in the California Floristic Province have been converted into housing projects, shopping centers, and roads.C.Acacia trees of Central and South America provide food for stinging ants, while the stinging ants sting other insects on the trees.D.In Japan, hummingbird hawkmoths drink nectar from a species of flowering plants and transfer the plants' pollen to other flowering plants of the same species. 2. ExitWhich was the MOST likely consequence of introducing the Japanese kudzu into the eastern United States?A.Kudzu now depends on the native shrubs for survival.B.The native mature trees now depend on kudzu for sunlight.C.The native mature trees kill kudzu by choking the vines and uprooting them.D.Kudzu kills native shrubs by smothering them under a solid blanket of leaves.3. The acacia tree species and the stinging ant species of Central and South America depend on one another for survival in many ways.Which is the MOST likely consequence if the number of stinging ants in Central and South America decreased for some reason?A.The number of acacia trees would increase.B.The number of acacia trees would decrease.C.The number of acacia trees would stay the same.4. Which of the following can reduce biodiversity within a natural environment?A.Yucca moths pollinate and feed on yucca plants in the Mojave Desert.B.Red-billed oxpeckers eat ticks off of impalas' coats in the grasslands of East Africa.C.Non-native American bullfrogs out-compete native amphibians in the Tropical Andes.D.Giant kangaroo rats enrich the soil for plants with their piles of grass clippings in the California grasslands.5. Which of the following describes how different species depend on one another in a natural environment?A.Non-native kudzu out-compete native plants in the eastern United States.B.Giant African snails imported as pets damage native plants and crops in Hawaii.C.Grasslands in the California Floristic Province have been converted into housing projects, shopping centers, and roads.D.Acacia trees of Central and South America provide shelter for stinging ants, while the stinging ants snip surrounding plants that grow too close.6. Which of the following describes how different species depend on one another in a natural environment?A.Non-native kudzu out-compete native plants in the eastern United States.B.Giant African snails imported as pets damage native plants and crops in Hawaii.C.Australian light brown apple moths damage crops and native plants in California.D.Giant kangaroo rats enrich the soil for plants with their piles of grass clippings in the California grasslands.7. Why is the destruction of a natural environment a risk to the survival of humans?A.Humans depend on many species for food.B.Humans depend on many species for technology.C.Humans depend on natural environments for landfill space.D.Humans depend on natural environments for scrap-metal yard space.8. Which is a major threat to biodiversity?A.Red-billed oxpeckers eat ticks off of impalas' coats in the grasslands of East Africa.B.Mining in the Guinean Forests of West Africa to provide diamond and gold jewelry for humans.C.Acacia trees of Central and South America provide food for stinging ants, while the stinging ants snip surrounding plants that grow too close.D.In Japan, hummingbird hawkmoths drink nectar from a species of flowering plants and transfer the plants' pollen to other flowering plants of the same species. 9. Which describes a natural environment with the greatest biodiversity?A.10 red squirrels, 20 bristlecone pine treesB.55 bristlecone pine trees, 30 snowshoe rabbitsC.25 snowshoe rabbits, 100 bristlecone pine trees, 5 red squirrelsD.10 red squirrels, 45 snowshoe rabbits, 100 bristlecone pine trees10. The acacia tree species and the stinging ant species of Central and South America depend on one another for survival in many ways.Which is the MOST likely consequence if the number of acacia trees in Central and South America decreased for some reason?A.The number of stinging ants would increase.B.The number of stinging ants would decrease.C.The number of stinging ants would stay the same. Expand. Your answer should be a polynomial in standard form. (x-4)(x-6) Your client has $80,000 invested in stock A. She would like to build a two-stock portfolio by investing another $80,000 in either stock B or C. She wants a portfolio with an expected return of at least 15% and as low a risk as possible, the standard deviation must be no more than 25%. Expected Return Standard Deviation Correlation With A A 18% 30% 1.0 B 17% 25% 0.3 C 15% 15% 0.4_____ Help me I will give you brainliest!!!! g Tanning Company analyzes its receivables to estimate bad debt expense. The accounts receivable balance is $276,000 and credit sales are $1,000,000. An aging of accounts receivable shows that approximately 3% of the outstanding receivables will be uncollectible. What adjusting entry will Tanning Company make if the Allowance for Doubtful Accounts has a credit balance of $2,200 before adjustment? Which factors add to the greenhouse effect and are caused by human activities? Select two options. (This question requires Two answers)A.a decrease in the amount of dust in the atmosphereB.a decrease in the amount of water on Earths surfaceC.an increase in gases in the atmosphere that absorb heatD.an increase in surfaces that radiate energy into the atmosphereE.an increase in the amount of solar radiation that reflects into space The radius of a circle is 4 miles. What is the area of a sector bounded by a 180 arc? How are earthworms and fish similar? ASAP!! HELP PLEASE!! I WILL MARK YOU BRAINLIEST!!! What do plants and phytoplankton have in common? alive on land bare consumers cuse photosynthesis duse chemosynthesis How does this climax connect to the theme "Evil cannever truly hide itself'?O By breaking down the door, Poole and Mr. Uttersonare finally able to find Dr. Jekyll.10 By breaking down the door, Poole finally revealshis destructive instincts.10 By breaking down a door, Mr. Utterson and Poolefinally reveal the evil character, Mr. Hyde. Can some one help me??? What are global wind patterns called? 1. Remember, evaluate means to plug in the value for the specifiedvariable.wEvaluate: (x - 3)2 + 2x - 4 for x = 5 A society should have a fixed territory. why? log x + Log(x+5) = log 6 Write the expression as a single natural logarithm. 3 ln 6 + 4 ln x Blaming the victim is participating in aO Shame cultureO Nature and nurture syndromeO Policing cultureO Blame game Science Will give brainless and 22 points Solve the following problem: Given: SAL, SA = LA AT bisector Prove: mL = mS 1. What is the point of including the childhood prayer in the introduction?