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3 years ago

Which expression has a value of 15 when

Mathematics

1 answer:

Lelu [443]3 years ago

7 0

The expression has a value of 15 when you divide by 2.

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-16t squared + 16t + 480 t=time after jumping in seconds h=height in feet How many seconds did did it take her to hit the water

Agata [3.3K]

That is height
h=16t^2+16t+480
when h=0 is when it hits the water

0=16t^2+16t+480
undistribbute 16 for ease
0=16(t^2+t+30)
16*0=0 so assume
t^2+t+30=0
factor
(t+6)(t-5)=0
set to zero

t+6=0
minus 6
t=-6
false, since you cannot have negative time

t-5=0
add 5
t=5

at t=5 she hits the water

5 seconds

4 0

4 years ago

Is this the answer someone help plz

ivann1987 [24]

You're right.

Since the output has different number of jumps from one number to another.

7 0

3 years ago

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What is The equivalent fraction of 2/5

Nat2105 [25]

Answer:

4/10 is equivalent to 2/5

Step-by-step explanation:

because 4/10 is written as 0.4 in decimal form and so is 2/5, which means they are equivalent

7 0

4 years ago

Doreen bought 2 liters of lemonade. How many millimeters of lemonade did Doreen buy?

MatroZZZ [7]

Answer:

Mr. Perkins changed the oil in his car. He bought. 6 liters of oil. He put 4,500 ml in his car.

Step-by-step explanation:

7 0

3 years ago

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2 easy math questions!!!!!! Show work! Multiple choice!

elena55 [62]

Greetings!

<u>Question Seven:</u>
To find the slope given two points, we can use the slope formula:
$m= \frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

Input the points: (-11,5) (-6,1)
$m= \frac{1-5}{-6-(-11)}$

Simplify the equation:
$m= \frac{-4}{5}$

A parallel slope would be identical to this slope.

Therefore, the answer is B:
$\boxed{m_{2}= \frac{-4}{5}}$

-----------------------------------------------------------------------------------------------------------------

<u>Question Eight:</u>
This question essentially asks you to rearrange the equation into slope y-intercept form:
$y=mx+b$

Rearrange the equation:
$8x+7y=51$

$7y=-8x-51$

$y=\frac{-8x-51}{7}$

$y=\frac{-8}{7}x-\frac{51}{7}$

The slope (rate of change) is $\frac{-8}{7}$

Therefore the answer is F:
$\boxed{m=\frac{-8}{7} }$

I hope this helped!
-Benjamin

4 0

4 years ago

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