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3 years ago

100 POINTS!!!! PLEASE HELP ASAP!!! EXPLANATION WOULD BE GREATLY APPRECIATED!

Mathematics

1 answer:

Dmitrij [34]3 years ago

5 0

Answer:

1) B- Substitution

2) C- Elimination

3) A- Graphing

Step-by-step explanation:

x+3y=7

5x+11y=3

x = 7 - 3y

Plug this x into the second equation and solve for y first

5x-3y=3 --> (1)

2x+7y=6 --> (2)

Since making any variable the subject would involve fractions, it's better to go for elimination

7(1) + 3(2)

would eliminate y

While comparing cost and adjusting choices, a graph is a better approach because all the possibilities are right in front

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(-17,-5), (15,-13)<br> Slope of the line through each pair of points

Andreyy89

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Using -17 ,15
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Hope this helps!

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2 years ago

A group of students are going to attend a concert. The cost per person varies inversely and depends on the number of people atte

Anni [7]

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3 years ago

Can someone please help me with this one? I’m very confused, how can you solve for the width if the problem doesn’t tell you wha

Marizza181 [45]

Answer:

A. (2x-3)/2

Step-by-step explanation:

Performing the long division indicated by the perimeter expression, you find ...

perimeter = (2x -3) + (10x +6)/(x^2 +2x)

Comparing this to the formula for the perimeter ...

perimeter = 2W +2L

where L is said to be of the form (ax +b)/(x^2 +2x)

we can match terms in the perimeter expression to see that ...

2W = 2x -3

2L = (10x +6)/(x^2 +2x)

The problem doesn't ask for it, but we can see that (a, b) = (5, 3). We can also see that ...

W = (2x -3)/2 . . . . . . . matches choice A

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3 years ago

What is the value of the expression 10(6 + 5)² when b = 3?

SashulF [63]

10(3+5)^2

10(8)^2

10(64)

=640

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2 years ago

I need a fast response to this

nasty-shy [4]

It’s the last answe

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2 years ago