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3 years ago

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?

SIZIF [17.4K]

Answer:

first and third digit are the same.

not prime numbers,

191 yes but 484 no.

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3 years ago

How to write 139,852 in Standard form

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This is standard form

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4 years ago

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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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BCD, because the largest side of a triangle is opposite to the largest interior angle.
Pls mark me as the Brainliest as I really need it!

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3 years ago

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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

Area 1 + Area 2

90 feet² + 48 feet² = 138 feet²

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3 years ago