How do I solve y= -3x + 21 -2x +3y = 8 by substitution?

Answers

Answer 1

Answer:

x = 5

Step-by-step explanation:

substitute the y  equation into -2x +3y =8 and you will get 5 as the solution :)


Related Questions

Find the value of the expressions when; a2+b +7 when a=5 and b=11.

Answers

28 is the answer your welcome

HURRY WILL MARK YOU BRAINLIEST RIGHT ANSWER ONLY

Answers

Answer:

Step-by-step explanation:

set the two equations equal to each other then solve for n

6n + 3 = 4n + 11

2n = 8

n = 4

plug n in for both equations

6(4) + 3

24 + 3 = 27

4(4) + 11

16 + 11 = 27

27 + 27 = 54

the distance is 54

Given that f(x)=x-9, g(x)=3x^2-2x+5, Find the function

(f+g)(x):_____________

Answers

Answer:

f(g(x)) thats what (fog)(x) is

3(x-9)^2-2(x-9)+5

your answer is 3x^2-56x+266

Step-by-step explanation:

hope it helps

I will give brainliest, you have to put these in the correct order (24 points)

Answers

Answer:

First i do not know sorry please help me

Step-by-step explanation:

Answer:

second to last first, and then the third second and first and then last There u go :^

Step-by-step explanation:

The cost of one pound of bananas is greater than $0.41 and less than $0.50. Sarah pays $3.40 for x pounds of bananas. Which inequality represents the range of possible pounds purchased? 0.41 < 0.41 less than StartFraction 3.40 over x EndFraction less than 0.50. < 0.50 0.41 < 0.41 less than StartFraction x over 3.40 EndFraction less than 0.50. < 0.50 0.41 < 3.40x < 0.50 0.41 < 3.40 + x < 0.50

Answers

Answer:

0.41 x < 3.40 < 0.50 x

If there is a whole number of pounds it could be: x = 8 pounds

0.41 * 8 = 3.28,  0.50 * 8 = 4

3.28 < 3.40 < 4

Answer:

Inequality is

0.41 x < 3.40 < 0.50 x

Step-by-step explanation:

Need help asap thanks

Answers

Answer:

1. SAS 2. SSS 3. ASA 4. AAS

Step-by-step explanation:

1. They provide you with an equal side, an equal angle, and one shared side which is equal.

2. They provide you with an equal side, another equal side, and one shared side that is equal.

3. They provide you with an equal angle, an equal side, and another equal angle.

4. They provide you with an equal angle, another equal angle, and one shared side that is equal.

If 24 = 118, what is the measure of each of the other
angles?

Answers

Answer:

Step-by-step explanation:

Lines l and m are the parallel lines and line n is a transversal intersecting parallel lines.

Since, m∠2 = m∠4 = 118° [Given]

m∠2 = m∠6 = 118° [Corresponding angles]

m∠4 = m∠8 = 118° [Corresponding angles]

m∠1 + m∠2 = 180° [Linear pair of angles]

m∠1 = 180° - 118° = 62°

m∠1 = m∠5 = 62° [Corresponding angles]

m∠3 = m∠1 = 62° [Corresponding angles]

m∠7 = m∠5 = 62° [Corresponding angles]

I need to find the x pls help and show work

Answers

Answer:

Start giving more points

Step-by-step explanation:

plus i needed the points

Answer:

x=143

Step-by-step explanation:

deNew image over pre-image so 52/4 would equal x/11 because those sides correspond, then cross multiply to get 572 equals 4x then divide each side by 4 to get x=143

Will mark brainliest for whoever answers

Answers

The answer is a I believe

I hope this helped :)

Alaska is -3 degrees, lowa is 5 degrees, Idaho is - 7 degrees, New York is 9 degrees, and
Maine is -1. Which state has the coldest temperature?

Answers

Answer:

Idaho

Step-by-step explanation:

I am stuck on part b

Answers

Answer: answer is 3.

Step-by-step explanation:

Mean is the sum of all the numbers divided by how many numbers are being added.

Mean = (1 + 2 + 3 + 4 + 5)/5

= 15/5

= 3

Mazie bought a bike during a 20% off sale and saved $16. What was the original price?

Answers

Answer:

$80. Which means she spent $64 with the sale, but the original price is $80.

Step-by-step explanation:

16 is 20% of 80

Answer

The answer is $120.00

Options

What was the price of the bicycle when Mazie bought it?

$140.00

$149.80

$130.00

$120.00

Explanation

Multiply the price of the bike by the discount percentage

150 * 0.20 = 30

Subtract the number you just found from the original price

150 - 30 = 120

There is your answer

You could take a shortcut by doing the following

1 - 0.20 = 0.80

Then multiply the original value by the new percentage

150 * 0.80 = 120

Personally I like the first method because it makes more sense.

the other khan academy assignment

Answers

Answer:

(5,-3)

Step-by-step explanation:

difference in x is 5 and in y it is .5 so add those to (0,-3.5) and you get (5,-3)

select each expression that is equivalent to 5(n + 4).
A. 5n + 4
B. 5n + 20
C. 15 + 5n + 5
D. 5(n + 3) + 5
E. 5n + 54

Answers

Answer:

B and C and D

Step-by-step explanation:

Answer:

The Answer is B. C. and D.

Step-by-step explanation:

Two years ago, Jose bought $750 worth of stock in a cell phone company. Since then the value of his stock has been DECREASING at an average rate of 5 1/4 % per year. How much is the stock worth now?

Answers

Answer:

$671.25

Step-by-step explanation:

To get the amount by which the stock have reduced after 2 years, we will use the interest formula;

Interest = Principal * rate * time/100

Interest = 750*5 1/4 * 2/100

Interest = 750*21*2/400

Interest = $78.75

This means that the value of the stock has reduced by $78.75 after 2 years;

Amount that the stock worth now = $750 - $78.75

Amount that the stock worth now = $671.25

question in picture I WILL GIVE BRIANLIEST!!!!!

Answers

Answer:

d the very bottom 6- , 4-

Step-by-step explanation:

bc x im sure is always first then it goes  up y is last

People use water to​ cook, clean, and drink every day. An estimate of 17.2% of the water used each day is for cooking . If a family uses 68.8 gallons of water a day for cooking​, how many gallons do they use every​ day?

Answers

Ummmmmmm try using those things that help ppl with math

PLSSSS HELPPP ME SOMEBODY WITH THESE MATH QUESTIONS!!!!!!!!! OR AT LEAST TRYYYYYYYYYYY. REWARD BRAINLIESTTTTT

Answers

Answer:

i would help but i am very bad at math

Step-by-step explanation:

i’m at sorry

The line plot shows the pieces of ribbon that Terry can choose for her next craft project.
Terry uses all of the 24 feet pieces.
Number of Ribbon Pieces (feet)
XX
XXX
х
XX+
X+m
1
1 1 1
2 213 21/2 2 1
What is the total length of ribbon Terry uses?
O A 3 feet
OB. 4 and 1/2 feet
Ос. 6 and 1/4 feet
O D. 6 and 3/4 feet
Lo

Answers

I THINK B but I’m not as sure

Mikey has $100 to spend on books. She wants to buy at least 14 books. Hardback books cost $15.00 and paperback books cost $7.00.

Represent the scenario as a system of inequalities.

A. x+y≤100
15x+7y≥14

B. x+y≤14
15x+7y≥100

C. x+y≥14
15x+7y≤100

D. x+y≥100
15x+7y≤14

Answers

A. x+y<100
15x+7y>14 is the right answer

PLS HELP WORTH 20 POINTS

Answers

Answer:

all the sides are the same so it would be 5

Step-by-step explanation:

The side are the same so igg to would be 5

What is the domain of the square root function graphed below?

Answers

Answer:

X is greater than or equal to 3

Step-by-step explanation:

As you Can See the graph Starts at (3, 1) and the point is filled in which mean it includes 3 the graph continues going there for the domain= x-axis is greater than or equal to 3

Answer:

i think its A or B but im not really sure,most likely A =w=

What is the purpose of a regression line?

to connect all the points in a scatterplot
to show the general tendency of the points in a scatterplot
to provide a scale for the x-coordinates of the points in a scatterplot
to provide a scale for the y-coordinates of the points in a scatterplot

Answers

Answer:

B). to show the general tendency of the points in a scatterplot

Step-by-step explanation:

The purpose of a regression line is to show the general tendency of the points in a scatterplot option (B) is correct.

What is a regression line?

A regression line is a graph that illustrates the pattern of a group of statistics. In other words, it shows the data's best pattern.

It is given that:

The regression line is a line of best fit.

From the definition of the regression line, line is a graph that illustrates the pattern of a group of statistics and to show the general tendency of the points in a scatterplot.

Thus, the purpose of a regression line is to show the general tendency of the points in a scatterplot option (B) is correct.

Learn more about the regression line here:

brainly.com/question/7656407

#SPJ6

How do solve this question? Find an equation of a line parallel to the given line and contains the given point. Write the equation in slope–intercept form. With the equation 2x + 5y= -10 point (10, 4).

Answers

Answer:

y = -2/5 x + 8

Step-by-step explanation:

First we need to find the slope of the given line;

Given the line 2x + 5y= -10, we need to write it in standard form of y = mx+c

Make y the subject of the formula;

2x + 5y= -10

5y = -2x-10

y = -2x/5-10/5

y = -2x/5 - 2

Hence the slope of the line m = -2/5

Since the equation of the line we need is parallel to this line, hence they will have the same slope.

The slope of the required line = -2/5

Get the intercept;

Substitute the point (10,4) and m = -2/5 into the equation y = mx+c

4 = -2/5(10)+c

4 = -4 + c

c = 8

Get the required equation;

y = mx+c

y = -2/5 x + 8

Hence the equation of a line parallel to the given line and contains the given point is y = -2/5 x + 8

graph and find the coordinates ​

Answers

Answer:

a' (4,3)

b' (2,-3)

c' (-1,0)

to graph the triangles, you plot the points an then connect them to form a triangle. you have to plot triangle ABC and then triangle A'B'C'

Step-by-step explanation:

Manuel wants to replace the wooden floor at his gym. The floor is in the shape of a rectangle. Its length is 40 feet and its width is 25 feet. Suppose wood flooring costs 11$ for each square foot. How much will the wood flooring cost for the floor?

Answers

Answer:

$11,000

Step-by-step explanation:

Step one:

given data

the dimension of the gym is

length = 40ft

width= 25ft

Area= 40*25

Area= 1000ft^2

Step two:

     if 1ft^2 will cost $11

then 1000ft^2 will cost x

cross multiply

x=1000*11

x=$11,000

The cost for the floor is $11,000

An object with a motional kinetic energy of 96J. Its velocity is 4m/s. What is its mass?​

Answers

KE = 1/2mv^2
96 = 1/2m(16)
96 = 8m
m = 12 kg

7. Simplify the expression.
3[(15 – 3)2 + 4

Answers

Answer:

84

Step-by-step explanation:

Answer:

If you meant 3 [ ( 15-3 ) 2 ] + 4, the answer should be 73.

Step-by-step explanation:

3 [ ( 15-3 ) 2 ] + 4

= 3 [ ( 12 ) 2 ] + 4

= 3 [ 24 ] + 4

= 69 + 4

= 73

what is 1/4 divided by 5.

Answers

Answer: 1/20 or 20

Step-by-step explanation:

Omar goes to a restaurant with his family. The total cost of their food is $136. An 8% sales tax is applied to the cost of their food. His family also wants to leave an 18% tip, which is based on the pre-tax food cost. How much will the final restaurant bill be?

A, $146.88
B, $160.48
C, $171.36
D, $173.32​

Answers

Answer:

C. 171.36....... :)).......

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