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kow [346]
3 years ago
14

Evaluate 3(4-2)^2 :) :)

Mathematics
1 answer:
skad [1K]3 years ago
8 0
Yeah the answer is B. 12
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Answer:

Step-by-step explanation:c

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3 years ago
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A rope with a length of 24 yards is cut into 7 pieces of equal length. Which is the correct way to show how to find how many yar
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Answer:

3 1/3

Step-by-step explanation:

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At time t ≥ 0, the velocity of a body moving along the s-axis is v = t² -5t +4. When is the body moving backwards
katovenus [111]

Answer:

A

Step-by-step explanation:

The velocity of a moving body is given by the equation:

v=t^2-5t+4 ,\, t\geq0

Is the velocity is <em>positive </em>(v>0), then our object will be moving <em>forwards</em>.

And if the velocity is negative (v<0), then our object will be moving <em>backwards</em>.

We want to find between which interval(s) is the object moving backwards. Hence, the second condition. Therefore:

v

By substitution:

t^2-5t+4

Solve. To do so, we can first solve for <em>t</em> and then test values. By factoring:

(t-4)(t-1)=0

Zero Product Property:

t=1, \text{ and } t=4

Now, by testing values for t<1, 1<t<4, and t>4, we see that:

v(0)=4>0,\, v(2)=-20

So, the (only) interval for which <em>v</em> is <0 is the second interval: 1<t<4.

Hence, our answer is A.

7 0
3 years ago
The prism is completely filled with 1750 cubes that have edge length of 15 ft.
neonofarm [45]

The volume of the prism = 14 ft³

Solution:

Number of cubes in the prism = 1750

Edge length of each cube (a) = \frac{1}{5} ft

<u>To find the volume of each cube:</u>

Volume of each cube = a³

                                    $=\left(\frac{1}{5} \right)^3

Volume of each cube $=\frac{1}{125}  \ \text{ft}^3

<u>To find the volume of the prism:</u>

Volume of the prism = Volume of each cube × Number of cubes

                                  $=\frac{1}{125}  \ \text{ft}^3\times 1750

                                  = 14 ft³

The volume of the prism = 14 ft³

7 0
3 years ago
Y=x+5<br> y=-2x-4<br> use substitution
blondinia [14]
You have to do Y= -2+5-4
7 0
3 years ago
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