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3 years ago

I need how to solve this problem ?

Mathematics

1 answer:

artcher [175]3 years ago

8 0

3. A(r) = 4(pi symbol)r^2

r=4(pi symbol)A^2
r/4(pi symbol)=A^2

A=(sqaure root of)r/4(pi symbol)

4. d(v)=v^2/64

v=d^2/64

64v=d^2

(square root of)64v=d

Hope this helped!

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If f(x)= 5x-3 what is f(-4)

Over [174]

Plug the -4 into equation

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then subtract -20-3

when you have two negatives you add

= -23
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g100num [7]

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If y varies directly as x, and y is 18 when x is 5, which expression can be used to find the value of y when x is 11?

Leokris [45]

Answer: The value of y is 39.6 when x = 11 and the required expression is y(11) = 39.6

Step-by-step explanation:

Since we have given that

y varies directly as x.

If y = 18, when x = 5.

So, we need to find the value of y when x is 11.

According to question, we get that

$\dfrac{y}{x}=\dfrac{18}{5}=\dfrac{y}{11}\\\\18\times 11=5y\\\\198=5y\\\\\dfrac{198}{5}=y\\\\y=39.6$

Hence, the value of y is 39.6 when x = 11 and the required expression is y(11) = 39.6

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2 years ago

How many times greater is 70 million than 7 million

Dahasolnce [82]

For this case we have the following expressions:

70,000,000

7,000,000

If we divide the first expression by the second we have:

$\frac {70,000,000} {7,000,000} = 10$

Thus, we have that the first expression is 10 times greater than the second expression.

Answer:

70,000,000 is 10 times greater than 7,000,000

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