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4 years ago

What is the formula to calculate the area of a circle on 1

Mathematics

1 answer:

kupik [55]4 years ago

5 0

A=(pie) squared times 1/2
I think this is correct but I’m not sure

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siw is a fourth as old as mother, and Mona is a fifth as old as mother. Mother is 22 years older than the two girls together. Ho

myrzilka [38]

Answer:

Siw's age is 10 years old

Mona's age is 8 yers old

Mother's age is 40 years old

Step-by-step explanation:

Let

x ----> Siw's age

y ---> Mona's age

z ---> Mother's age

we know that

Siw is a fourth as old as mother

$x=\frac{1}{4}z$ ----> equation A

Mona is a fifth as old as mother

$y=\frac{1}{5}z$ ----> equation B

Mother is 22 years older than the two girls together.

$z=x+y+22$ ----> equation C

substitute equation A and equation B in equation C

$z=\frac{1}{4}z+\frac{1}{5}z+22$

solve for z

Multiply by 20 both sides to remove the fraction

$20z=5z+4z+440$

$20z-9z=440\\11z=440\\z=40\ years$

Find the value of x

$x=\frac{1}{4}(40)=10\ years$

Find the value of y

$y=\frac{1}{5}(40)=8\ years$

therefore

Siw's age is 10 years old

Mona's age is 8 yers old

Mother's age is 40 years old

6 0

4 years ago

Which function below is the inverse of f(x) = x2 − 25?

Viktor [21]

$f(x) = x^{2} - 25$
Let f(x) = y
thus y = $x^{2} - 25$
switch the position of y and x in the equation
$x = y ^{2} - 25$
then solve for y in this case
$x + 25 = y^{2} 
$
∴ y= $\sqrt{x + 25}$

Thus, $f^{-1} (x) = \sqrt{x + 25}$

3 0

3 years ago

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One inch is 25.4 millimeters. Write 25.4 millimeters as a mixed number in simplest form.

Ronch [10]

25 2/5
Twenty five and two fifths

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3 years ago

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Sedaia [141]

Answer:

They are both 60 degress

Step-by-step explanation:

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3 years ago

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S_A_V [24]

Answer: welp im in 7th grade so uh... i may be underqualified... but here's my attempt! if it's wrong just lmk and I'll delete it

In the owl world egg laying usually happens about one month after courtship begins. The incubation period for owl eggs is about 30 days, so taking 2 months to increase population is about normal.

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