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4 years ago

12

Which two numbers add up to -8 and multiply to -8?

1 answer:

otez555 [7]4 years ago

4 0

0 I think......DONT KNOW

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How do you find the square root of 130 in radical form?

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4 years ago

Alfonso has 435 stamps in his collection. He wants to collect at least

kherson [118]

Answer:

Inequality: $435 + d \geq 815$

Solution: $d \geq 380$

Step-by-step explanation:

He has 435 stamps in his collections.

He will collect d stamps, and he wants to collect at least 815 stamps, that is, the sum of 435 and d has to be at least 815.

So the inequality is given by:

$435 + d \geq 815$

And the answer is given by:

$d \geq 815 - 435$

$d \geq 380$

8 0

3 years ago

H=-16t^2+122t+5 where h is height in feet and t is time in seconds. How long will it take the baseball to hit the ground? h=-16t

OLga [1]

Answer:

$t= 7.67$

$t= 10.13s$

Step-by-step explanation:

Solving (a):

$H=-16t^2+122t+5$

Required: Time to hit the ground

This means that H = 0

So, we have:

$0=-16t^2+122t+5$

Rewrite as:

$16t^2-122t-5=0$

Solve for t using:

$t= \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

$t= \frac{122 \± \sqrt{(-122)^2 - 4*16*-5}}{2*16}$

$t= \frac{122 \± \sqrt{15204}}{2*16}$

$t= \frac{122 \± 123.3}{32}$

Split:

$t= \frac{122 + 123.3}{32}$ or $t= \frac{122 - 123.3}{32}$

$t= \frac{245.3}{32}$ or $t= \frac{-1.3}{32}$

$t= 7.67$ or $t= -0.0406$

Time can not be negative. so: $t= 7.67$

Solving (b):

$h=-16t^2+162t+0.2$

Required: Time to hit the ground

This means that h = 0

$0=-16t^2+162t+0.2$

Rewrite as:

$16t^2-162t-0.2= 0$

Solve for t using:

$t= \frac{-b \± \sqrt{b^2 - 4ac}}{2a}$

$t= \frac{162 \± \sqrt{(-162)^2 - 4*16*-0.2}}{2*16}$

$t= \frac{162 \± \sqrt{26256.8}}{32}$

$t= \frac{162 \± 162.04}{32}$

$t= \frac{162 + 162.04}{32}$ or $t= \frac{162 - 162.04}{32}$

$t= \frac{324.04}{32}$ or $t= \frac{-0.04}{32}$

Time can not be negative. So:

$t= \frac{324.04}{32}$

$t= 10.13s$

4 0

3 years ago