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inysia [295]
3 years ago
14

Solve the system by elimination 2x-3y=23 x+3y=-20

Mathematics
1 answer:
Fantom [35]3 years ago
4 0

Answer:

x = 1

y = -7

Step-by-step explanation:

2x-3y=23

+ x+3y =-20

3x + 0 = 3

x = 1

(1) + 3y = -20

-1 -1

3y = -21

y = -7

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Please help i will give you brainliest and every yhing
Lina20 [59]

first subtract the last equation from the first. this gives:-

-x + y = -8 .....................(1)

Then multiply the first equation by 2 and add it to the 2nd equations This gives

9x = 18  

so x = 2

and from equation  (1)  y = -8 + 2 = -6

Substituting for x and y in the second equation

z =  (24 -5(2) -12) / 2 =   1


Answer is choice b.

7 0
3 years ago
What is the point slope of an equation with slope of 3/5 that passes through the point (10,-2)
Verdich [7]
The answer would be B. It gives you the slope and a point on the graph so use that to your advantage. All of the answers show the slope and the slope in the right place, so for now it can be any of them. Then we get to the point (10,-2). For point slope form you would switch the signs for both x and y. So the Y would now be +2 and x would be -10. Y goes together with y, and X goes together with x. In this case y+-y= slope(X+-x) Substitute in for them. Y+2=3/5(X-10)
4 0
3 years ago
Read 2 more answers
A.<br> If the side ratio is 5:13, then the area ratio is ?
frez [133]

25:169 can be if is a rectangle  ( times by the number itself )

or is is a square times by 2 ( 10/26)

8 0
3 years ago
Kevin had a total of $320 to spend while shopping. He had spent $156 on video games. He wants to buy caps that are on sale for $
zloy xaker [14]

Maximum number of caps that Kevin can buy is 10.

Solution:

Total money for shopping = $320

Amount spent for video game = $156

Remaining amount that Kevin had = $320 – $156

                                                         = $164

Cost of each cap including tax = $15

$\text{Number of caps can buy }=\frac{\text { Remaining amount that Kevin had }}{\text { cost of each cap }}$

                                       $=\frac{164}{15}

                                      $=10\frac{14}{15}

Maximum number of caps that Kevin can buy is 10.

8 0
3 years ago
if the area of a triangular base prism is 11 cm² and the height of the prism is 12 cm, what is the volume of the prism?
Natasha2012 [34]

Answer:

132 cm²

Step-by-step explanation:

Your welcome

7 0
2 years ago
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