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Misha Larkins [42]
3 years ago
11

Simply (-8.5)(-5)(-2). Help 21 POINTS

Mathematics
2 answers:
Serggg [28]3 years ago
6 0

(-8.5)(-5)(-2)

= (-8.5)(10)

= -85

answer

- 85

kirill115 [55]3 years ago
3 0

To simplify this, we just have to multiply each of these values together. We don't have to worry about the order--we just have to multiply them correctly.

To help us multiply these values more easily, we can multiply -5 and -2 to get 10. Since it's each to multiply things by ten (you just move the decimal point one place to the right).

Now we have to multiply -8.5 and 10. Moving the decimal point one place to the right, we get our answer of -85.

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Lemur [1.5K]
Let 1 number equal x
<span>Let the other number equal 1/2x + 6

x + (1/2x + 6) =21
1 & 1/2 x + 6 =21
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3 years ago
Find the volume of a pyramid with a square base with a perimeter of the base is 5.7 cm in the height of the pyramid is 8.6 
dexar [7]

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try 28.4 inches to the 3rd power

Step-by-step explanation:

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2 years ago
A fastball is hit straight up over home plate. The ball's height, h (in feet), from the ground is modeled by ℎ = −16푡 ଶ+103푡+5 w
Liono4ka [1.6K]

Question:

A fastball is hit straight up over home plate. The ball's height, h (in feet), from the ground is modeled by h(t)=-16t^2+80t+5, where t is measured in seconds.  Write an equation to determine how long it will take for the ball to reach the ground.

Answer:

t = 5.0625

Step-by-step explanation:

Given

h(t)=-16t^2+80t+5

Required

Find t when the ball hits the ground

This implies that h(t) = 0

So, we have:

0=-16t^2+80t+5

Reorder

-16t^2+80t+5 = 0

Using quadratic formula, we have:

t = \frac{-b\±\sqrt{b^2 - 4ac}}{2a}

Where

a = -16      b =80      c = 5

So, we have:

t = \frac{-80\±\sqrt{80^2 - 4*-16*5}}{2*-16}

t = \frac{-80\±\sqrt{6400 +320}}{-32}

t = \frac{-80\±\sqrt{6720}}{-32}

t = \frac{-80\±82.0}{-32}

This gives:

t = \frac{-80+82.0}{-32} or t = \frac{-80-82.0}{-32}

t = \frac{2}{-32} or t = \frac{-162}{-32}

t = -\frac{2}{32} or t = \frac{162}{32}

But time can not be negative.

So, we have:

t = \frac{162}{32}

t = 5.0625

<em>Hence, time to hit the ground is 5.0625 seconds</em>

3 0
2 years ago
18x + 101 = 4<br> 91 – 51'= -1<br> help me pleasee
juin [17]

Distribute the -9 into the values in the parentheses.

STEP BY STEP

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-9*-3=27

Therefore, the equation then becomes: 18x+27.

The answer is the first choice, or A.

3 0
2 years ago
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