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liberstina [14]

3 years ago

10

How do you know which terms to combine and which terms not to combine

1 answer:

katrin2010 [14]3 years ago

4 0

You know when for example they have the same variable or if there is no variable then you could combine them.For example, if it is 3x and 5x you could combine it to get 8x but if it is like 3x and 2y, you can’t combine it since it doesn’t have the same variable

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Chris shoots an arrow up into the air. The height (in feet) of the arrow is given by the function h(t) = - 16t2 + 64t + 112 wher

iris [78.8K]

Answer:

After 2 seconds

Step-by-step explanation:

First step is find an equation of velocity:

h(t)=-16t2+64t+112. The velocity function is derivated from position function, so we should do that.

v(t)= h´(t)= -16*2*t+64 ⇒ v(t)= -32t+64.

Now we know the arrow reach the maximun height when this velocity is equal to zero when t>0.

0=-32t+64 ⇒ 32t=64, split each member for 32 ⇒ $\frac{32t}{32}$ = $\frac{64}{32}$

t=2. That means after 2 sec. the arrow reach the maximum height

6 0

4 years ago

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Gina had 2 boxes with y pencils in each box. After she gave away 4 pencils to her sister, she had no more than 16 pencils left.

STALIN [3.7K]

Answer:

c

Step-by-step explanation:

7 0

3 years ago

Tom has 3 kids, the product of their ages is 72. What is the sum of their ages?

mafiozo [28]

Their ages are 24 years old each.

5 0

3 years ago

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Kevin has $25 . MP3 downloads cost $0.75 each . How many songs can he download and still have $13 left to spend

Trava [24]

He can download at most 16 songs to leave $13 for himself to spend.

Use the equation $25-$0.75(x)=$13

6 0

3 years ago

Saturn's rings extend to about 120,000 kilometers above Saturn's equator. Saturn's diameter at its equator is also about 120,000

Allisa [31]

<u>Answer:</u>

1130400 km

<u>Step-by-step explanation:</u>

We know the formula for circumference of a circle:

<em>Circumference = $2\pi r$ </em>

So we need the radius of Saturn ring to calculate its circumference.

We are given Saturn's diamter which is 120,000km; and know that Saturn's ring extends for about 120,000 km from the circumference of the Saturn.

Therefore, the radius of Saturn's ring will be 120000 km plus half of the diameter of Saturn:

Radius of Saturn's ring = 120000 + (120000/2) = 180000 km

Circumference of Saturn's rings = 2 x 3.14 x 180000 = 1130400 km

3 0

4 years ago