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2 years ago

6

When solving a system of equations by elimination, there are multiple correct ways you can start. which of the following is NOT

a correct first step to solve this system?
(picture included)

1 answer:

Marta_Voda [28]2 years ago

5 0

Answer: the 2nd one

Step-by-step explanation: you didn’t multiply the -7 by 5, therefore being wrong

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What would the answer be for this equation 7x/20 - 5x/12

polet [3.4K]

Answer:

$\frac{1}{15} x$

Step-by-step explanation:

$\frac{7x}{20} - \frac{5x}{12}$

$\frac{3 \times 7x}{3 \times 20} - \frac{5 \times 5x}{5 \times 12}$

$\frac{21x}{60} - \frac{25x}{60}$

$\frac{21x - 25x}{60} = (21 - 25)x = - 4x$

$\frac{ - 4x}{60} = - \frac{ x}{15}$

$\boxed{\green{= \frac{1}{15} x}}$

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1 year ago

The____ states that The part equals the percent multiplied by the whole

Leto [7]

Problem

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2 years ago

Find the product of<br>3/5 × 7/11

andrew-mc [135]

Answer:

21/55

Step-by-step explanation:

Simply multiply the top 2 together:

3 x 7 = 21

And the bottom 2 together:

5 x 11 = 55

21/55 is your answer!

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2 years ago

Read 2 more answers

Clays hair is 10 2/7 inches long. The barber trims off 1/4. About how long is his hair now ?

zubka84 [21]

Answer:

7 5/7 inches long

Step-by-step explanation:

To find the length of his hair now you need to find 3/4 of 10 2/7.

3/4* 72/7

216/26

54/7

7 5/7 inches long

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2 years ago

There is a bag filled with 5 blue and 6 red marbles.

Lorico [155]

There are 6+5 marbles.

Of those, 5 are red.

The chances of drawing a red marble are 5/11

Since you replace the marble you drew, the chances each draw remain 5/11

You cannot draw two red marbles without drawing a red marble on your first draw, so the odds of you making a second draw are 5/11. The odds of that also being red are 5/11… but we only care about that 5/11ths the time

5/11*5/11=25/121

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2 years ago