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3 years ago

7

Tell me the answer to 10 times 2000 equal blank thousand equal blank

1 answer:

timofeeve [1]3 years ago

5 0

10x2000= 20,000
2000
X 10
--------
0000
20000

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Which of the following arcs are congruent in the circle below?

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3 years ago

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Which values are solutions to the inequality below? Check all that apply.

sp2606 [1]

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4 years ago

Simplify 2 x times the fraction 1 over x to the power of negative 3 times x to the power of negative 2.

labwork [276]

Answer : 2x

Explanation:

(1/x)^-3 = x³

x^-2=1/x²

2 x x³ x 1/x² =2x

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3 years ago

In a 10 mile race, Janet covered the first 2 miles at a constant rate. She then sped up and rode her bike the last 8 miles at a

xenn [34]

Answer:

$0.83\text{ miles per minute}$

Step-by-step explanation:

GIVEN: In a $10$ mile race, Janet covered the first $2$ miles at a constant rate. She then speed up and rode her bike the last $8$ miles at a rate that was $0.5$ miles per minute faster. Janet's overall time would have been $2$ minutes faster had she ridden her bike the whole race at the faster pace.

TO FIND: What was Janet's average speed (in miles per minute) for the whole race?

SOLUTION:

let the speed of Janet in first $2\text{ miles}$ $=x\text{ miles per minute}$

speed of Janet's bike in last $8\text{ miles}$ $=x\text{+0.5 miles per minute}$

total time taken by Janet,

$\text{Time}=\frac{\text{distance}}{\text{speed}}$

$\text{Time taken}=\frac{2}{x}+\frac{8}{x+0.5}\text{minute}$

Time taken if Janet rides whole race at faster pace $=\frac{10}{x+0.5}\text{minute}$

As, Janet's overall time would have been $2\text{ minutes}$ faster had she ridden her bike the whole race at the faster pace.

$\frac{2}{x}+\frac{8}{x+0.5}=\frac{10}{x+0.5}+2$

$\frac{2}{x}-\frac{2}{x+0.5}=2$

$\frac{1}{x}-\frac{1}{x+0.5}=1$

$x^{2} +0.5x-1=0$

on solving we get

$x=0.5\text{ miles per minute}$

$\text{Time taken}=\frac{2}{x}+\frac{8}{x+0.5}\text{minute}$

$\text{Time taken}=\frac{2}{0.5}+\frac{8}{1}\text{minute}$

$\text{Time taken}=\frac{2}{x}+\frac{8}{x+0.5}\text{minute}$

$\text{Time taken}=12\text{minute}$

Average speed $=\frac{\text{total distance}}{\text{time taken}}$

Average speed $=\frac{10}{12}=0.83\text{miles per minute}$

Therefore average speed of Janet was $0.83\text{ miles per minute}$

4 0

3 years ago

Park Jimin paid $125 to have his hair colored and cut. If he tips his hairdresser 15% of his bill, how much was the tip?

Virty [35]

Money paid by Park Jimin = $125

We need to find the tip , so,

→ 15% of the amount paid

→ $ 125 (15/100)

→ $ 18.75

Hence, the tip is of $ 18.75

4 0

3 years ago