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2 years ago

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1. Use the expression 10 x ? where? represents a factor between 1 and 9. What is true about the digit in the ones place of each

product? Explain.
what are they asking for?

1 answer:

marishachu [46]2 years ago

4 0

We want to study a general product, and find information about the ones place.

We will see that the ones place is always zero.

We have the expression:

10×?

Where ? can be any number between 1 and 9 (only whole ones)

What is true about the digit of the ones place (the first digit at the left of the decimal point) in each product?

Let's give ? some different values and see what happens:

10×1 = 10

10×2 = 20

10×3 = 30

etc...

We can see that the ones place will always be equal to zero.

If you want to learn more, you can read:

brainly.com/question/16552177

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Determine whether the data described are qualitative or quantitative. The maximum speed limit on interstate highways.

dalvyx [7]

The answer is B: Quantitative

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3 years ago

Stu trained for a triathlon for 5 hours yesterday. He ran 5 miles and then biked 80 miles. His biking speed is 15 mph faster tha

lara31 [8.8K]

Answer:

Step-by-step explanation:

Given as :

The distance cover while running = $D_1$ = 5 miles

Let The speed for running = $S_1$

The distance cover with bike = $D_2$ = 80 miles

The speed for biking = $S_2$ = 15 mph + $S_1$

Total Time taken = 5 hours

Now Time = $\dfrac{\textrm Distance}{\textrm Speed}$

∴ 5 hour = $\frac{D_1}{S_1}$ + $\frac{D_2}{S_2}$

Or, 5 hour = $\frac{5}{S_1}$ + $\frac{80}{15+S_1}$

Or, 5 hour = $\frac{75 + 5 S_1 + 80 S_1}{S_1(15+S_1)}$

or, 5 × ( $S_1^{2}+15 S_1$ ) = $85 S_1 + 75$

Or, $5 S_1^{2} + 75 S_1$ - $85 S_1 - 75$ = 0

or, $5 S_1^{2} -10 S_1 - 75$ = 0

or, $S_1^{2} -2 S_1 - 15$ = 0

Or, $S_1^{2} -3 S_1 + 5 S_1- 15$ = 0

Or, $S_1 (S_1 - 3) + 5 (S_1 - 3)$ = 0

Or, $(S_1 - 3) ( S_1 + 5 )$ = 0

∴ $S_1$ = 3 , - 5

So, the running speed = 3 mile per hour

And the biking speed = 15 mph + 3 mph = 18 mile per hour

Hence The running speed of Stu is 3 mile per hour . Answer

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3 years ago

What is the volume of a sphere with surface area of 25 pi yd squared?

kherson [118]

$\bf \textit{surface area of a sphere}\\\\ SA=4\pi r^2~~ \begin{cases} r=radius\\ \cline{1-1} SA=25\pi \end{cases}\implies 25\pi =4\pi r^2 \\\\\\ \cfrac{25\pi }{4\pi }=r^2\implies \cfrac{25}{4}=r^2\implies \sqrt{\cfrac{25}{4}}=r\implies \cfrac{\sqrt{25}}{\sqrt{4}}=r\implies \cfrac{5}{2}=r \\\\[-0.35em] ~\dotfill$

$\bf \textit{volume of a sphere}\\\\ V=\cfrac{4\pi r^3}{3}\qquad \qquad \implies V=\cfrac{4\pi \left( \frac{5}{2} \right)^3}{3}\implies V=\cfrac{4\pi \cdot \frac{125}{8}}{3}\implies V=\cfrac{\frac{500\pi }{8}}{~~\frac{3}{1}~~} \\\\\\ V=\cfrac{500\pi }{8}\cdot \cfrac{1}{3}\implies V=\cfrac{500\pi }{24}\implies V=\cfrac{125\pi }{6}\implies V\approx 65.45$

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3 years ago

(1, 7); slope = -1 please help fast

Harrizon [31]

Answer:

y = - x + 8

Step-by-step explanation:

Step 1:

y = mx + b Slope Intercept Form

Step 2:

y = -x + b Input Slope

Step 3:

7 = - 1 ( 1 ) + b Input x and y

Step 4:

7 = - 1 + b Multiply

Step 5:

b = 8 Add 1 on both sides

Answer:

y = - x + 8

Hope This Helps :)

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3 years ago

Read 2 more answers

Evaluate the following expression. 5^-3

Ulleksa [173]

5^-3 is 1/125

The negative in the exponent makes it so there is a 1 over the problem if there was no negative. When you have a negative in the exponent, the answer will be the reciprocal (opposite) of the question with no negative.
For example,

9^2 = 81

9^-2 = 1/81

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2 years ago