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2 years ago

Find the area of the circle.

Mathematics

1 answer:

Alona [7]2 years ago

4 0

Answer:

C is the answer.

Step-by-step explanation:

Area of circle = $\pi r^2$

radius = 3

use pi = 3.14

So you have 3.14(3)^2

which equals 28.26 units squared, which is C.

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Katie is twice as old as her sister Mara. The sum of their ages is 24. Find their ages.

Alenkasestr [34]

So k=katie's' age
m=mara's age

k is 2 times as old as m
k=2m

sum is 24
add means sum
k+m=24

so we have
k+m=24 and
k=2m
subsitute
2m+m=24
add
3m=24
divide both sides by 3
m=8
subsitute again
k=2m
k=2(8)
k=16

katie=16
mara=8

4 0

3 years ago

What is the value of fraction 1 over 2x3 + 5.2y when x = 2 and y = 3?

mihalych1998 [28]

I think is 1/27.6 because 2x equals 4 and times 3 equals 12. 5.2y equals 15.6. Then 15.6 plus 12 equals 27.6.

4 0

3 years ago

You heard it as a FRACTION! please answer this lol I'm clueless :'D

uysha [10]

Answer:

$\frac{a}{b + 2}$

___

b + 2

4 0

2 years ago

Read 2 more answers

What values of a and b make the equation true? StartRoot 648 EndRoot = StartRoot 2 Superscript a Baseline times 3 Superscript b

kramer

Option C: $a=3, b=4$ is the value of a and b

Explanation:

Given that the expression $\sqrt{648}=\sqrt{2^a\times3^b}$

We need to determine the value of a and b

Let us consider the term $\sqrt{648}$ and take the prime factorization of the term 648

Thus, we have,

648 divides by 2,

$648=2 \cdot 324$

324 divides by 2,

$648=2 \cdot 2 \cdot 162$

162 divides by 2,

$648=2 \cdot 2 \cdot 2 \cdot 81$

81 divides by 3,

$648=2 \cdot 2 \cdot 2 \cdot 3 \cdot 27$

27 divides by 3,

$648=2 \cdot 2 \cdot 2 \cdot 3 \cdot 3 \cdot 9$

9 divides by 3,

$648=2 \cdot 2 \cdot 2 \cdot 3 \cdot 3 \cdot 3 \cdot 3$

Thus, we have,

$\sqrt{648}=\sqrt{2^{3} \cdot 3^{4}}$

Therefore, equating the powers of 2 and 3, we get,

$a=3, b=4$

Hence, the value of a and b is 3 and 4

Thus, Option C is the correct answer.

4 0

3 years ago

Read 2 more answers

Which are the solutions of a quadratic equation x squared equals -5 x - 3

Ksju [112]

Answer:

Desmos says (-4.303 and -0.697)

Step-by-step explanation:

6 0

2 years ago