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3 years ago

Need Help Please! attachment below

Mathematics

1 answer:

Umnica [9.8K]3 years ago

5 0

The answer is B. You add all the numbers together and divide by the amount of numbers you have to find the mean. The missing height is 62 because 54+57+59+63+66+68+70+58=563
563/9 (amount of numbers you have including the missing height) = 63

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Fifty five miles per hour converted to feet per second

stiks02 [169]

$\frac{55miles}{hour}*\frac{hour}{3600 seconds}*\frac{5280feet}{mile}$
$\frac{55}{1}*\frac{1}{3600 seconds}*\frac{5280feet}{1}=80.67ft/sec$

6 0

3 years ago

Can you explain how to do this?

ivanzaharov [21]

Hi there! The answer is x = 1

Let's solve this problem step by step!
$8(10) {}^{2x} = 800$

First divide both sides of the equation by 8.
$10 {}^{2x} = 100$

Now rewrite 100 as a power of 10.
$10 {}^{2x} = 10 {}^{2}$

Now we can use the following rule, which basically means that two different exponents of the same base must be the same
${g}^{a} = {g}^{b} \\ a = b$

We now get this.
$2x = 2$

Finally divide both sides by 2.
$x = 1$

~ Hope this helps you!

3 0

3 years ago

Someone please help me I’ll give out brainliest please dont answer if you don’t know

Nezavi [6.7K]

Answer:

x = 112

Step-by-step explanation:

1/8x + 2 = 16

Subtract 2 from both sides

1/8x = 14

Multiply both sides by 8

x = 112

7 0

3 years ago

Train A departs from Point A with a velocity of 150 km/h, Train B departs from Point B with a velocity of 100 km/h, and the dist

Mkey [24]

Let us consider the initial position of train A, $s_{0A}=0$ . This implies that $s_{0B}=500$ .

Moreover, we have

$v_A=150, \quad v_B=-100$

This implies that the two equations are

$s_A(t)=150t,\quad s_B(t)=500-100t$

The two trains meet if and only if their positions are the same, at the same time:

$s_A(t)=s_B(t) \iff 150t=500-100t \iff 250t=500 \iff t=2$

So, the two trains meet after 2 hours.

7 0

3 years ago

Read 2 more answers

What is the slope-intercept equation for this line?

Inessa05 [86]

Answer:

y=-2x-1

Step-by-step explanation: This is because of rise/run. This means rise, count up or down until you hit the line that is horizontal to where your line intersects a whole point. Then run, what you count horizontal matches with your rise count. This means we can count 2/1 and since it's going down it's negative. So the slope is -2 and the y-intercept is -1 because it intersects through the y-intercept -1.

4 0

2 years ago