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3 years ago

[geometry] i got 267.94 but how do i answer that in fraction?

Mathematics

1 answer:

Firlakuza [10]3 years ago

8 0

Well, first off, you see how all the answers say a fraction, then pi? that means that you don't calculate pi into your answer.
But lets see. The radius is 4. V=(4/3)pi*r^2
V=(4/3)pi*4^2
V=(4/3)pi*16
V=(4/3)*16*pi
V=(4/3)*(16/1)*pi
V=(4*16)/(3*1)*pi
V=64/3*pi
so the answer is (B) 64/3pi units cubed.

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What is the solutions to the equation w/2w-3=4/w

labwork [276]

Answer:

{2, 6}

Step-by-step explanation:

w/2w-3=4/w is ambiguous. Did you mean

w 4

---------- = ------ ? If so, please enclose "2w - 3" inside parentheses.

2w - 3 w

Cross multiplying, we get w² = 8w - 12.

Putting this into standard form, we get:

w² - 8w + 12 = 0, which factors into (w - 2)(w - 6) = 0.

The solutions are found by setting each factor = 0 separately and solving the resulting equations for w: {2, 6}.

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3 years ago

linda scored 35, 47, and 42 points on three tests. how many points should she get on the fourth test to get an average score of

aliya0001 [1]

(35 + 47 + 42 + x) / 4 = 50
(124 + x) / 4 = 50....multiply both sides by 4, cancelling the 4 on the left side.
124 + x = 50 * 4
124 + x = 200
x = 200 - 124
x = 76 <===

6 0

3 years ago

Factor the polynomial completely 10x^2-23x 13

BartSMP [9]

10x^2-23x+13
(10x-13)(X-1). Answer
Look at steps to learn this try not to just copy answer
10x(X-1)= 10x^2-10x
-13(X-1)= -13x+13
-10x^2-10x-13x+13
-10x^2-23x+13

8 0

3 years ago

How can i solve by completing the square 4r^2-28r=-49

Natalija [7]

To complete the square, the second degree term must have a coefficient of 1.
Since the second degree term here has a coefficient of 4, we start by dividing each term on both sides by 4.

$4r^2 - 28r = -49$

$\dfrac{4r^2}{4} - \dfrac{28}{4}r = -\dfrac{49}{4}$

$r^2 - 7r = -\dfrac{49}{4}$

Now we can complete the square.
First, we need to find what number completes the square.
We take the coefficient of the first degree term, -7 in this case.
Divide it by 2 and square it. -7 divided by 2 is the fraction -7/2.
Now we square -7/2 to get 49/4.
We add 49/4 to both sides.

$r^2 - 7r + \dfrac{49}{4} = -\dfrac{49}{4} + \dfrac{49}{4}$

$(r - \dfrac{7}{2})^2 = 0$

$r - \dfrac{7}{2} = 0$

$r = \dfrac{7}{2}$

3 0

4 years ago

Jamal opened a savings account with $100 at the beginning of the year. At the end of each month, he deposits $25 into the accoun

ELEN [110]

Answer:

T= $100 + $25

Step-by-step explanation:

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3 years ago