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1 year ago

I need helping solving this

Mathematics

1 answer:

olchik [2.2K]1 year ago

8 0

Answer: x= 5

Step-by-step explanation:

Plug the second equation into the first equation’s y.
3x-2(-2x+7)=21

Then use distribution

3x+4x-14=21

Add 4x and 3x

7x-14=21

Then add 14 to both sides

7x=35

Divide by 7 to get x

35/7=5

x=5

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Ian tosses a bone up in the air for his dog, Spot. The height, h, in feet, that Spot is above the ground at the time t seconds a

kirill115 [55]

Answer:

12 feet per second.

Step-by-step explanation:

Please consider the complete question.

Ian tosses a bone up in the air for his dog, Spot. The height, h, in feet, that Spot is above the ground at the time t seconds after she jumps for the bone can be represented $h(t)=-16t^2+20t$ .

What is Spot's average rate of ascent, in feet per second, from the time she jumps into the air to the time she catches the bone at t=1/2?

We will use average rate of change formula to solve our given problem.

$\text{Average rate of change}=\frac{f(b)-f(a)}{b-a}$

$\text{Average rate of change}=\frac{h(\frac{1}{2})-h(0)}{\frac{1}{2}-0}$

$\text{Average rate of change}=\frac{-16\cdot(\frac{1}{2})^2+20\cdot \frac{1}{2}-(-16\cdot(0)^2+20\cdot (0))}{\frac{1}{2}-0}$

$\text{Average rate of change}=\frac{-16\cdot\frac{1}{4}+10-(0)}{\frac{1}{2}}$

$\text{Average rate of change}=\frac{-4+10}{\frac{1}{2}}$

$\text{Average rate of change}=\frac{6}{\frac{1}{2}}$

$\text{Average rate of change}=\frac{2\cdot 6}{1}$

$\text{Average rate of change}=12$

Therefore, Spot's average rate of ascent is 12 feet per second.

3 0

2 years ago

Help its due in 5 mins lol

inessss [21]

Y= 26 & x=35 hope I did it on time!

6 0

2 years ago

Pls help i only have 2 minutes!!!!!!!!!!!!!!

umka21 [38]

Answer:

40 + ( -63) is less

Step-by-step explanation:

.... .....

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2 years ago

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Hunter is 4.52 feet tall. His sister is 0.75 times his height. How tall is Hunter's sister

Dominik [7]

Answer:

Hunter's sister is 4.53 feet tall.

Step-by-step explanation:

4.52 x 0.75 = <u>3.39 feet</u>

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2 years ago

How many extraneous solutions are there ?

vfiekz [6]

2 is your correct answer

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2 years ago

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