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3 years ago

Rational number arithmatic

Mathematics

2 answers:

adoni [48]3 years ago

7 0

Answer:

A and D are the ones that are right

Blizzard [7]3 years ago

4 0

Answer:

a and d

Step-by-step explanation:

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a ball is shot straight upward. with it's height, in feet, after t seconds given by the function f(t)=-16t^2+192t. Find the aver

jekas [21]

ANSWER

$80 {ms}^{ - 1}$

EXPLANATION

The average velocity of the ball is the rateof displacement over the total time.

The height of the ball, in feet, after t seconds is given by the function:

$f(t)=-16t^2+192t$

At time t=1, the height of the ball is

$f(1)=-16(1)^2+192(1)$

$f(1)=-16+192 = 176ft$

At time t=6, the height of the ball is

$f(6)=-16(6)^2+192(6)$

$f(6)=-16(36)+192(6)$

$f(6)=-576+1152 = 576$

The average velocity

$= \frac{f(6) - f(1)}{6 - 1}$

$= \frac{576- 176}{6 - 1}$

$= \frac{400}{5}$

$= 80 {ms}^{ - 1}$

7 0

3 years ago

Solve the following system of equations.

timofeeve [1]

+8y and -8y cross out.

So the first one is 3x=15
Second one is 2x=10

x=5
Then plug x is one of the equations

2(5)-8y=10
10-8y=10

x=5
y=0

3 0

3 years ago

Read 2 more answers

A pre-school has 12 four-year old children and 11 three-year old children. What is the ratio of four-year old

madreJ [45]

Answer:

12:11

Step-by-step explanation

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2 years ago

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Five pounds of bananas cost $2.35. How much does it cost per pound?

andrezito [222]

Answer:

The answer is 0.47

Step-by-step explanation:

You can get this answer by doing division 5 divided by 2.35 and

then you get 0.47

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3 years ago

2. John has written too many checks

nignag [31]

127.98 money he need

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2 years ago