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3 years ago

I need help asapppplpplll

Mathematics

1 answer:

My name is Ann [436]3 years ago

7 0

Answer:

sqrt( 3 V / pi h) =r

Step-by-step explanation:

V = 1/3 pi r^2 h

Multiply each side by 3

3 V = 1/3 pi r^2 h*3

3 V = pi r^2 h

Divide each side by pi h

3 V/ pi h = pi r^2 h/ pi h

3 V/ pi h = r^2

Take the square root of each side

sqrt( 3 V / pi h) = sqrt(r^2)

sqrt( 3 V / pi h) =r

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muminat

Answer:

9 to 4

Step-by-step explanation:

If you divide each of the first numbers on the answers by each of the second numbers they all become a ratio of 2 to 1 except for 9 to 4.

7 0

3 years ago

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Perform the indicated operation.(3/a+2) + (4/a-5)

kipiarov [429]

Answer:

$\frac{7(a-1)}{(a+2)(a-5)}$

Step-by-step explanation:

To solve this operation we need to find the common multiple of both denominators and solve for a.

$\frac{3}{a+2} + \frac{4}{a-5} =\frac{3(a-5)+4(a+2)}{(a+2)(a-5)} =\frac{3a-15+4a+8}{(a+2)(a-5)} =\frac{7a-7}{(a+2)(a-5)} =\frac{7(a-1)}{(a+2)(a-5)}$

Thus, the solution is 7(a -1) / (a+2)(a-5)

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3 years ago

Which is log x+ 6 log(x+7) written as a single logarithm.

Elina [12.6K]

Answer: option d.

Step-by-step explanation:

To solve this problem you must keep on mind the properties of logarithms:

$log(b)-log(a)=log(\frac{b}{a})\\\\log(b)+log(a)=log(ba)\\\\a*log(b)=log(b)^a$

Therefore, knowing the properties, you can write the expression gven in the problem as shown below:

$5logx+6log(x+7)=logx^5+log(x+7)^6=logx^5(x+7)^6$

Then, the answer is the option d.

4 0

3 years ago

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Evaluate the following f(-2)+f(-3)=

8090 [49]

It would be =-5f
Hope this helps

7 0

3 years ago

If (x) = 3x - 5 and g(x) = x + 3, find (f - g)(x).

Temka [501]

Answer:

2x -8

Step-by-step explanation:

f (x) = 3x - 5

g(x) = x + 3,

(f - g)(x) = 3x - 5 - ( x+3)

Distribute the minus sign

= 3x-5 -x-3

Combine like terms

= 2x -8

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3 years ago

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