Question #4 A system of equations is shown below.
(4x - 5y = - 10
2x - 7y = 4
Which operations on the system of equations will isolate the y quantity?

y = -4/5x + 2 & y = -2/7x - 4/7

Step-by-step explanation:

(4x) - 5y = -10                                             (2x) - 7y = 4

Move 4x on the same side as -10            Move 2x on the same side as 4

-5y = 4x -10                                                -7y = 2x + 4

Divide -5 to both sides                              Divide -7 by both sides

That should isolate the y for both equations.

4x/-5 = -4/5x-10/-5 = 2                            2x/-7 = -2/7x4/-7 = -4/7

y = -4/5x + 2                                                y = -2/7x - 4/7

If that wasn't the answer to your question, I'm sorry.

But if it did, then your welcome.

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.