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3 years ago

On the first one I need to show work how I got the answer but I don't get it

Mathematics

2 answers:

slamgirl [31]3 years ago

5 0

Joe paid $25 for a $40 sweater, so we need to know what percent of 40 25 is.
25/40 is .625, or 62.5%. Subtract that from 100% and you get 37.5%, the answer to the question.

15% off would make the sweater $31, instead of $25.

givi [52]3 years ago

4 0

0.15x40=25 give me thumbs up if it's right

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3x+4y+6z=15 Solve for x.

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Answer:

Step-by-step explanation:

<h3>Question:-</h3>

To solve for x

<h3>Equation:-</h3>

3x + 4y + 6z = 15

<h3>Solution:-</h3>

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[On Simplification]

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[On subtracting both sides with 6z]

=> 3x + 6z - 6z = 15 - 4y - 6z

[On Simplification]

=> 3x = 15 - 4y - 6z

[On dividing both sides with 3]

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2 years ago

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Which equation could you use to solve for x in the proportion StartFraction 4 over 5 EndFraction = StartFraction 9 over x EndFra

s344n2d4d5 [400]

Answer:

x = 9x5 / 4

x = 45/4

(either one)

Step-by-step explanation:

$\frac{4}{5}$ = $\frac{9}{x}$

Multiple known diagonals and divide by number opposite to unknown number (x).

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3 years ago

A total of 750 students attended a conference at avenel high school the attendance of the number of girls was twice that of the

leva [86]

Answer:

250 boys attended the conference.

Step-by-step explanation:

First, divide 750 by 3 (one-third of the conference is boys) and you will get 250 (number of boys). If you wanted to find the number of girls too, you would simply double 250 to get 500 girls.

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Alex17521 [72]

Answer:

-15

Step-by-step explanation:

The (/) is also a division sign

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