Mathematics Middle School

Solve the system of equations below by substitution. Write your answer as an ordered pair. e.g. (2,3)

Answers

Answer 1

(1,-2)
hope that helps

Answer 2

You replace y with -2 then you have 4x-2x(-2)=8 => 4x +4=8 so 4x=4 so x=1 .the answer would be (1,-2)

Related Questions

50 points! Answer AS much as you can, I give Brainliest!

Answers

Answer:

9. y = 8

10. n = 21

11. 44 = v

12. c = 35

Step-by-step explanation:

9. 9y = 72

Divide each side by 9

9y/9 = 72/9

y = 8

10. 3n = 63

Divide each side by 3

3n/3 = 63/3

n = 21

11. 4 = v/11

Multiply each side by 11

4*11 = v/11*11

44 = v

12. c/7 = 5

Multiply each side by 7

c/7*7 = 5*7

c = 35

y=8
n=21
v=44
c=35

hope that helps

A storage box has a height of 8 inches, length of 4 inches, and a width of 4 inches. I use cubes with an edge length of 12 inch. If the box is completely full, how many cubes will fit in the storage box?

Answers

Answer:

Step-by-step explanation:

8×4=32×4=128

12×3=36

128÷36= 3.5

but u need to put full cubes which would be 3

The answer is 3 I don’t really know how to explain it

Select all the expressions that are equal to 3/4

Answers

Answer:

A and B

Step-by-step explanation:

7/20 + 2/5 = 3/4

19/20 - 1/5 = 3/4

3 4/7 - 9/10 = 2 47/70

The answer is definitely A and B

Joe has 1/2 of a bag of peanuts. He wants to share them equally among himself and 3 friends. How much of the bag of peanuts would each person get?
A. 6
B. 1/6
C. 3/2
D. 1 1/2

Thank you!!!!!

Answers

Hi there! So joe had 1/2 of a bag of peanuts and he wants to share them equally, it would be 1/6! Answer B

The answer is B because you need to do

I need to get aleks done on june 3oth

Answers

Umm sure lol best of luck.

Answer:

The 23.7 oz is a better deal

Step-by-step explanation:

for the 10.1 oz it is $0.25 per ounce

for the 23.7 it is $0.23 per ounce

What is the area of the figure below?

Answers

answer: 88in^2
explanation: by separating the figure into easier pieces, simple triangles and rectangles, this problem becomes much easier.
by looking the overall length of the figure, we get 7, if you cut off the big rectangle in the middle from that seven, you end up with a diamond with a height of 10 and a length of 4. multiply those together to get the area of the points on either side.
10 x 4 = 40
now looking back at the rectangle, by adding up the heights, you get a height of 16. multiply this with the length of 3 and you get 48.
add the two and you get the total area.
40 + 48 = 88

Answer:

68 in

Step-by-step explanation:

Because the area of the squares is 3 x 3 = 9 and because there are two squares it is 18. The area of the central figure is 50 because i divided it into 4 triangles and 2 rectangles, each rectangle is 15 in and each triangle is 5 in so 15 x 2 = 30, 5 x 4 = 20 and 30 + 20 + 18 = 68

PLEASE HELP ASAP

Describe, in great detail, how you would graph a line that is in slope-intercept form.

Use y=-3x+ 5 as your example.

Answers

Hi there!

»»————-　★　————-««

Please see the explanation below.

»»————-　★　————-««

Explanation:

Recall the meanings of the variables in the slope-intercept equation.

⸻⸻⸻⸻

[tex]\boxed{\text{\underline{Slope Intercept Form:}}}\\\\y=mx+b\\---------------\\\boxed{\text{Key:}}\\\\\rightarrow \text{m - slope}\\\rightarrow \text{b - y - intercept}[/tex]

⸻⸻⸻⸻

We already have one point given, the y-intercept. The y-intercept of a line when given a slope intercept form equation is: [tex](0, b)[/tex]Using the example, we would graph the point (0,5) as our first point.

⸻⸻⸻⸻

To graph the second point, we need to understand the meaning of slope. The slope of a line can be remembered as 'rise over run'.The slope for the given equation is -3. This means we would have to go three units down and then one unit right from the y-intercept. Our new point would be (1,2).

⸻⸻⸻⸻

The result should be the graph attached.

»»————-　★　————-««

Hope this helps you. I apologize if it’s incorrect.

Thanks it’s really helpful

HELPPPPP!!!!!!!!!!!!!!!!!!!

Answers

Answer:

I think $10 is the answer

Just to confirm the last answer it is 10 dollars I think

BRAINLIEST FOR DIS MF!!!!!!!!!!!!!!!!!!!!!!

Answers

the first answer is 6x-2=46 and the third is 8 months

A= 2x-6=48 basically

Mr. Zeeman received a tax refund. He spent $40 on take-out food for a family dinner and used one-third of the remaining money to buy a new vacuum cleaner. After he deposited half of what was left in his checking account, he still had $80. How much was his tax refund?

Answers

$280
$80•2=160+80=240+40=280
Hope this helps :)

280

40+1/3=40.3
80+80=160
200+80=280

Help me i-Ready math. No links and no guesses

Answers

Answer:

box number 4 the last box

Step-by-step explanation:

because 5 x 5 = 25 and 25 x 5 = 125

Answer:4
Hope this helped

I. am. tired. of. posting. questions. over. and. over. again. I so serious this is a grade and today is my last day of school and report cards come in next week!!! PLZ HELP MEE. or else i will be grounded for the entire summer.... T~T

Answers

Answer:hi

Step-by-step explanation:plz like and brainliest i am noob I really need this plz

A) 1 week $10 | 2 weeks $20 | 3 weeks $30 | 4 weeks $40 | 5 weeks $50

B) m=10w

C) put the bottom as weeks and label it 1 through whatever and put the side as money and label it $10 through whatever and then graph a line going up $10 every week

D) 13 weeks because $128 divided by 10 is 12.8 and round to 13 weeks

The display at an aquarium has sea stars and eels in a ratio of 4:5. It also has 5/8 as many rockfish as sea stars. There are 40 more wolf eels than rockfish. How many Sea stars are there?

Answers

4.8 sea stars were there

64 sea stars in the aquarium.

What is Ratio?

Ratio is defined as a relationship between two quantities, it is expressed one divided by the other.

Ratio of see stars to eels = S : E = 4:5

E = 5/4(S)

Ratio of rockfish to sea strars = R : S = 5:8

R = 5/8(S)

E = R + 40

5/4(S) = 5/8(S) + 40

Multiply by 8 both the sides

10S = 5S + 320

5S = 320

S = 320/5

S = 64

Hence, 64 sea stars in the aquarium

Learn more about Ratio here:

brainly.com/question/1504221

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In the previous lesson, you created SMART goals for yourself to extend from the start of the semester to the end of the semester. This lesson introduced you to the various resources that are part of the course. How can these resources help you reach your goals?

Go back to your SMART goal chart from the previous lesson and alter one of the goals so that it incorporates the use of at least one resource.

Answers

Answer:

Improve your growth attitude, be more proactive, learn to understand yourself, be persistent despite hurdles, learn to accept your limits, learn how to make successful decisions, practice thankfulness, and stay open-minded to new opportunities are some of the ways that SMART goals can assist you.

Step-by-step explanation:

I've done this before :)

find the missing side lengths pls help and thanks

Answers

Answer:

missing side =12 cm

Step-by-step explanation:

let missing side be x

take these ratios

15/10=18/x

do cross multiplication

10*18=15*x

180=15x

180/15=x

12=x

Answer:

(a) = 12 :)

Step-by-step explanation:

I need to get aleks done on june 3oth

Answers

Answer:

3.2

Step-by-step explanation:

Since it is similar, we know that the sides are gonna be directly proportional so

QR (6.4) / BC (4) = scale factor of 1.6

1.6 x 2 = 3.2

Answer is 3.2 to your aleks

How many millimeters are equal to one kilometer?

Metric
1 kilometer = 1,000 meters
1 meter = 100 centimeters
1 meter = 1000 millimeters
1 centimeter = 10 millimeters

Answers

Answer: The answer would be 1,000,000, or one million.

Step-by-step explanation:

There are 1000 millimeters in a meter, and there is the same number of meters in one kilometer. So to solve for how many millimeters are in one kilometer, just multiply 1000 by 1000 to get 1,000,000. Hope this helps!

It will equal 1,000,000 kilometres

i neeed helppppp plssssssssssssssss

Answers

Well since there are 8 total possible outcomes you would take 8 and divide it by the total of green parts which would be 2 so you would do 8 divided by 2 which would give you 4 so your answer would be 4

Hope this helps

Answer

2/8

I’m not positive

The figure below shows the quotient of Fraction 3 over 4 divided by Fraction 3 over 8 .

Answers

The answer is 24/12. Then you should simplify and the answer would be 2/1. This is an improper fracture because numerator is bigger than the denominator so you ask yourself, “How many times can 1 multiply into 2.” The answer is a whole number which is 2

Need help with math quarterly please

Answers

Answer:

should be D

Step-by-step explanation:

man I'm in geometry I just know this stuff

HELP PLEASE WHATS THE RIGHT ANSWER (I GOT 67)

Answers

Answer:

Step-by-step explanation:

66%

Answer : the right answer is 66%

The perimeter of a square is represented by 20n-8. Write an expression that will represent each side of the square.

Answers

Answer:

n=3

Step-by-step explanation:

20+20+20 length +width+ height

20×3

(20n-8) / 4
5n-2 is the answer

Find the mean of the set of data. Use a calculator if necessary. (Remember to put the list in numerical order.)

13, 7, 12, 9, 6

Mean is _____.

9.8
10
9.4
8.4

Answers

Answer:

9.4

Step-by-step explanation:

How to find the mean of a data set: Add each number in the set together. Then divide the sum of all of the numbers by how many numbers there are.

The answer your looking for is 9.4

Please help asap!!.... <33

Answers

Answer:

448

Step-by-step explanation:

I = Prt where I is the interest P is the principle r is the rate and t is the time

I = 400 * (.02) * 6

I = 48

The amount in the account is the interest plus the original amount

400 +48

448

Answer:

$ 448

Step-by-step explanation:

amount that Elena deposit (P) =$ 400

rate of interest (R)=2%

time (T)=6 years

formula to find interest is

Interest = PTR/100

=$400*6*2/100

=$4800/100

=$48

Total amout she receives after 6 years is

Amount = Interest + Principal

=$48 + $400

=$448

I need to get aleks done on june 3oth

Answers

Answer:

I think you divide. So 2.53 divided by 5.48 or the other way around or something. I don't know for sure. Sorry. I think the 23.7 ounce is better though.

Step-by-step explanation:

Hope this helps!!!!!!!!!!!!!! :) :) :) :) :)

SORRY IF IT'S WRONG!!! :) :) :) :) :)

What is the distance between the following points?

Answers

Answer:

Step-by-step explanation:

it's c, the square root of 36

Using inverse operations is a direct way to solving equations

What is the Golden Rule for solving equations?

Answers

Answer:

Do unto one side of the equation, what you do to the other!

Step-by-step explanation:

An equation is like a balance scale. If we put something on, or take something off of one side, the scale (or equation) is unbalanced. When solving math equations, we must always keep the 'scale' (or equation) balanced so that both sides are ALWAYS equal.

Answer:

Keeping the equation balanced.

Step-by-step explanation:

You need to keep the equation balanced on both sides of the equal sign, like when you need to get rid of the number 4 on one side you have to do the same thing on the other side.

Question:
A running club keeps track of the number of hours each person has trained for a race and the length of time it takes the person to run the race. A scatter plot is graphed with the x-axis indicating the number of hours a runner has trained and the y-axis indicating the time, in minutes, it took to run the race. The equation y = 60 - 0.5x is used as the line of best fit of the data. What does the slope of the equation represent?

options:

a
Runners will decrease their race time by 2 minutes for every 1 hour they have trained.
b
Runners will increase their race time by 2 minutes for every 1 hour they have trained.
c
Runners will increase their race time by 1 minute for every 2 hours they have trained.
d
Runners will decrease their race time by 1 minute for every 2 hours they have traine

Answers

The solution is, 60 minutes is a good prediction of how long it will take Tom to run the 6 mile race.

What is scatter plot?

A scatter plot is a type of plot or mathematical diagram using Cartesian coordinates to display values for typically two variables for a set of data. If the points are coded, one additional variable can be displayed.

Here, we have,

We are given the scatter plot which shows the distance he has run and the time it took for each run.

We are asked to determine a good prediction of how long it will take Tom to run the 6 mile race?

One way to predict the time is by drawing a line that best fits the given data.

As you can see, from the line of best fit, the time corresponding to the 6 miles is around 60 minutes.

Therefore, 60 minutes is a good prediction of how long it will take Tom to run the 6 mile race.

Answers

Answer:

Step 2: 47

Step 3: 84

Step 4: 114

Step-by-step explanation:

Step 2: The width is 21, and the length is 36.

Sum is addition, so it would be 21 + 36.

21 + 36 = 47

Step 3: 47 x 2 = 84

Step 4: Perimeter is all around, whilst area is on the inside. The length is 21, so it is 21 + 21. 21 + 21 is 42. The width is 36, so it is 36 + 36, which is 72. 72 + 42 = 114.

Step 2:47
Step3: 84
Strp4: 114

Please help I don't understand what to do
Use the following images to answer the question:
a. Write a truth statement about each picture using Euclidean postulates.
b. Write the matching Euclidean postulate.
c. Describe the deductive reasoning you used.

Answers

This is wrong to me. Sorry

A sentence (sometimes also called a formula) is simply a string of characters or symbols.

E.g., “sin2 x + cos2 x = 1” is a sentence as is “5 + 4”.

A statement is a sentence that is definitely either true or false.

What are the Euclidean postulates?

A straight line segment may be drawn from any given point to any other. A straight line may be extended to any finite length. A circle may be described with any given point as its center and any distance as its radius. All right angles are congruent.

What are the 5 postulates described by Euclid?

Euclid's postulates were: Postulate 1: A straight line may be drawn from any one point to any other point. Postulate 2:A terminated line can be produced indefinitely. Postulate 3: A circle can be drawn with any center and radius. Postulate 4: All right angles are equal to one another.

Learn more about Euclidean postulates at

https://brainly.com/question/3745414

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