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tensa zangetsu [6.8K]
2 years ago
10

7. During a sale, the price of a pair of running shoes was marked down from $89.95 to $75.00. What was the

Mathematics
1 answer:
shutvik [7]2 years ago
7 0

Answer:

16.6%

Step-by-step explanation:

(75/89.95)*100=83.37....

100-83.37...=16.62...

=16.6%

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Thirty percent of a radioactive substance decays in four years.
wel

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The substance decays by 7.5% every year

Step-by-step explanation:

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Need help please for school thank uuuuu
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8x - 14 = 7.7x + 3x
djverab [1.8K]

Answer:

x=5.2

Step-by-step explanation:

8x−14=7.7x+3x

Step 1: Simplify both sides of the equation.

8x−14=7.7x+3x

8x+−14=7.7x+3x

8x−14=(7.7x+3x)(Combine Like Terms)

8x−14=10.7x

8x−14=10.7x

Step 2: Subtract 10.7x from both sides.

8x−14−10.7x=10.7x−10.7x

−2.7x−14=0

Step 3: Add 14 to both sides.

−2.7x−14+14=0+14

−2.7x=14

Step 4: Divide both sides by -2.7.

−2.7x /−2.7  = 14 /−2.7

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3 0
3 years ago
Find the equation of the line through point (3,2) and perpendicular to 3x + 5y = 15
Vesnalui [34]

Answer:

y=5/3x-3

Step-by-step explanation:

first, let's put 3x+5y=15 into y=mx+b form

move 3x to the other side

5y=-3x+15

divide by 5

y=-3/5x+3

now, perendicular lines have slopes that are negative and reciprocal.

With our new equation we can automatically find the slope, which would be 5/3.

now, we need to find b

plug the points (3,2) into y=5/3x+b

2=5/3(3)+b

2=5+b

-3=b

so that means that our equation will now be

y=5/3x-3.

Hope this helps!

6 0
3 years ago
Transform this equation to standard from. No decimals, fractions or negatives as leading coefficients
nadezda [96]

Answer:

3/4 or 0.75

Step-by-step explanation: y+-2x3/2

0= -2x 3/2=2x-3/2=x+-3/4=X=3/4 or 0.75

8 0
3 years ago
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