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2 years ago

I need help ! Please help me

Mathematics

2 answers:

kifflom [539]2 years ago

5 0

You can do this !

Since d=3, take your pencil and write the fraction again,
except wherever 'd' appears, write a '3' there instead.

Then you'll have a fraction with nothing but numbers in it, and
you can easily simplify and find the value of the fraction.

I did it in my head as I was looking over the picture, and
I found that the value of the fraction is between 5 and 10.
I don't want to just hand you the answer, because I know
that you can do it.

Mazyrski [523]2 years ago

4 0

4d² / (d+1) when d=3;
therefore:

4(3)² / (3+1)=4(9) / 4=9

Answer:4d² / (d+1) when d=3 is equal to 9.

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The formula for the surface area of a cylinder is SA= 2 pi r (h + r). What is the surface area of a cylinder when r = 3 centimet

Grace [21]

Answer:

if you google (surface area of a cylinder) it lets you input the radius and height and it gives your answer

Step-by-step explanation:

3 0

3 years ago

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:

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 positive (v>0), then our object will be moving forwards.

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

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 t 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 v is <0 is the second interval: 1<t<4.

Hence, our answer is A.

7 0

3 years ago

I need help on 4 and 6 please help me. Don’t put a link.

Arte-miy333 [17]

Answer:

I don't know about 4 but of no. 6, it is A

Step-by-step explanation:

3 0

2 years ago

The Rachel’s daily expenses for 10 days are in the table.

Annette [7]

The correct answer is $44.20.
If we add up all the tips, the total is $442. If we divide this by the number of days (10), then we find the mean.
442 / 10 = 44.2

4 0

3 years ago

PLEASE ANSWER. ill mark most brainliest.

yKpoI14uk [10]

Answer:

the answer is C

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers