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3 years ago

F(x)=-3x • I(x) = 5x² +8x

Mathematics

1 answer:

Naily [24]3 years ago

3 0

Step-by-step explanation:

f(x)=-3x • I(x) = 5x² +8x is backwards so all u do is turn it around :) hope this helps

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Someone please help with parts a b c and d. I will mark brainlest!!!

maria [59]

Answer:

A. 49 feet

B. 66 feet (round to the nearest foot)

C. 4 seg

Step-by-step explanation:

A. What is the height of the ball after 3 seconds?

For $t=3 seg$

$h(3)=-16(3)^{2} +63(3)+4$

$h(3)=-144+189+4\\h(3)=-144+193\\h(3)=49 feet$

B. What is the maximum height of the ball? round to the nearest foot

$h(t)=-16(t)^{2} +63(t)+4\\h'(t)=-32(t) +63\\$

then

$-32(t)+63=0\\t=\frac{-63}{-32}\\t=1.969seg$

For $t=1.969seg$

$h(1.969)=-16(1.969)^{2}+63(1.969)+4\\h(1.969)= 66.016\\h(1.969)=66 feet$

C. When will the ball hit the ground?

The ball will hit the ground when $h(t)=0$

so, $-16t^{2} +63(t)+4=0$

Using the quadratic equation

$t=4seg$

6 0

3 years ago

Min is about to roll a six-sided number cube. What is the experimental probability that she will roll an even number based on he

masya89 [10]

Answer:

Therefore the experimental probability that she will roll an even number is

C ) 0.5

Step-by-step explanation:

Let S be the sample space for the given experiment that to Roll six sided number Cube

∴ S ≡ { 1, 2, 3, 4, 5, 6}

∴ n(S) = 6

Let 'A' be the event of experiment that she will roll an even number

∴ A ≡ { 2, 4, 6 }

∴ n(A) = 3

To Find:

P(A) = ?

Solution:

We know that for any experiment probability is given by

$\textrm{probability of the experiment}=\dfrac{\textrm{number of favourable outcomes}}{\textrm{total number of outcomes}}$

Substituting the values we get

$P(A)=\frac{n(A)}{n(S)} =\frac{3}{6} =\frac{1}{2} =0.5$

Therefore the experimental probability that she will roll an even number is

C ) 0.5

8 0

3 years ago

4x+6y=-20, -4x-5y=10

Lyrx [107]

X= 10 and y= -10 (mathpapa.com)

8 0

3 years ago

Amy's mac notebook weighs 1/2 pound her science notebook weighs 7/8 pound into history notebook weights 3/4 pound what are the w

Julli [10]

Okay so it will go mac book, history notebook, then science book

5 0

3 years ago

Read 2 more answers

4m+9+m=34 what does m =

NikAS [45]

5m+9=34

-9 34-9
25/5 =5

M=5

3 0

3 years ago