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3 years ago

The price of an item has been reduced by 20%. The original price was $55. What is the price of the item now?

Mathematics

1 answer:

STatiana [176]3 years ago

5 0

Answer:

The price is now $44

Step-by-step explanation:

The original price is $55

The discount percent is20%

Calculate the savings: 20% of $55 = $11

Subtract the savings from the original price to get the sale price: $55 - $11 = $44

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A father is now twice as old as his son. If the sum of their ages ten years ago was fifty two, how old are they today?

Oliga [24]

Answer:

24 and 48

Today, the son is 24 years old, and the father is 48 years old.

Step-by-step explanation:

(x - 10) + (2x - 10) = 52

3x + 20 = 52

3x = 72

x = 24

The father is 2 times his son's age.

= 2(24)

= 48

So, the son is 24 and the father is 48.

10 years ago, son was 14 and father was 38, if added, this adds up to 52, so we know our calculations are correct.

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3 years ago

Read 2 more answers

Ian tosses a bone up in the air for his dog, Spot. The height, h, in feet, that Spot is above the ground at the time t seconds a

kirill115 [55]

Answer:

12 feet per second.

Step-by-step explanation:

Please consider the complete question.

Ian tosses a bone up in the air for his dog, Spot. The height, h, in feet, that Spot is above the ground at the time t seconds after she jumps for the bone can be represented $h(t)=-16t^2+20t$ .

What is Spot's average rate of ascent, in feet per second, from the time she jumps into the air to the time she catches the bone at t=1/2?

We will use average rate of change formula to solve our given problem.

$\text{Average rate of change}=\frac{f(b)-f(a)}{b-a}$

$\text{Average rate of change}=\frac{h(\frac{1}{2})-h(0)}{\frac{1}{2}-0}$

$\text{Average rate of change}=\frac{-16\cdot(\frac{1}{2})^2+20\cdot \frac{1}{2}-(-16\cdot(0)^2+20\cdot (0))}{\frac{1}{2}-0}$

$\text{Average rate of change}=\frac{-16\cdot\frac{1}{4}+10-(0)}{\frac{1}{2}}$

$\text{Average rate of change}=\frac{-4+10}{\frac{1}{2}}$

$\text{Average rate of change}=\frac{6}{\frac{1}{2}}$

$\text{Average rate of change}=\frac{2\cdot 6}{1}$

$\text{Average rate of change}=12$

Therefore, Spot's average rate of ascent is 12 feet per second.

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3 years ago

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Semmy [17]

The answer is: 18 miles.

: Hope this helps :)

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Simplify 3/5 * 35 - 61

gizmo_the_mogwai [7]

Answer:

-15.6 or -15 3/5

Step-by-step explanation:

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kolbaska11 [484]

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Step-by-step explanation:

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