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3 years ago

What's 4x+2y=10 X-y=13

Mathematics

1 answer:

vampirchik [111]3 years ago

4 0

X=y+13 then put in above

4(y+13)+2y=10
4y+52+2y=10

6y=-42

divide by 6
y=-7

Now put in X=y+13
x=-7+13
x=6

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Read 2 more answers

Sweaters cost $42 each .For every 5 sweaters You buy,You get 1 sweater free.How much will a total of sweaters cost ?

solniwko [45]

Note: I think you may have unintentionally missed to mention the amount of total sweaters for which we have to measure the cost. So, after a little research, I was able to find the complete question. So, I will answer your question based on the following completing question. Anyways, it would clear your concept hopefully.

Here is the complete question:

Sweaters cost $42 each. For every 5 sweaters You buy,You get 1 sweater free. How much will a total of 30 sweaters cost?

Answer:

The cost of 30 sweaters = $1050

Step-by-step explanation:

What to determine?

How much will a total of 30 sweaters cost?

Information Fetching and Solution Steps:

The cost of each sweater = $42

For every 5 sweaters You buy, you get 1 sweater free. It means you will be able to get 6 sweaters for the price of 5

The cost of 6 sweaters ⇒ The cost of 5 sweaters + 1 free = 42×5 = $210

If the cost of 6 sweaters = $210

Then

the cost of 30 sweaters = 210 × 5 = $1050

Therefore, the cost of 30 sweaters = $1050

Keywords: cost

Learn more cost problems from brainly.com/question/13005346

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3 years ago