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Andre45 [30]
3 years ago
10

Negative2 - 7 is equvilent to

Mathematics
2 answers:
NeX [460]3 years ago
5 0

Answer:-5

Step-by-step explanation:

Amiraneli [1.4K]3 years ago
4 0

Answer:

-9

Step-by-step explanation:

-2 - 7

Picture a number line in your head, you begin at negative 2, which is less than 0 and you further go left 7 points, so you will end at -9

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What does 191 and 484 have in common?
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Answer:

first and third digit are the same.

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This is standard form
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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>

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3 years ago
Need help with geometry problem
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Diego is designing an exercise room. How many
AveGali [126]

The required figure is attached below :

Answer:

138 feet²

Step-by-step explanation:

To obtain the amout of rubber flooring needed to cover the floor, we take the area of the figure below :

A breakdown of the first gure is also attached below :

Area of rectangle (1) = Length * width = 15 feets * 6 feets = 90 ft²

Area of rectangle (2) = length * width = 6 feets * 8 feets = 48 feets

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