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SVETLANKA909090 [29]

2 years ago

12

A jar of marbles has 27 green marbles. This represents 30% of the marbles in the jar. How many total marbles are in the jar? Ple

ase someone hurry with the answer.

2 answers:

Nikitich [7]2 years ago

7 0

Answer:

90

Step-by-step explanation:

divide 27 by thirty then multiply by 100

Brums [2.3K]2 years ago

6 0

Answer:

90 i think

Step-by-step explanation:

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Elijah's father is 47. He is 17 years older than twice Elijah's age. How old is Elijah?

ch4aika [34]

Answer:

let Elijah age be a

Then

2*a + 17 =47

2a=47-17

2a=30

a=15

Step-by-step explanation:

4 0

3 years ago

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Select the correct answer.

DochEvi [55]

Answer:

0.097

Step-by-step explanation:

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3 years ago

In a circle, area and circumference can be found using the formulas A=(pi)r^2 and C=2(pi)r, respectively, Write a formula for A

AURORKA [14]

Answer:

$A = \dfrac{C^2}{4\pi}$

Step-by-step explanation:

Given that

Area of a circle $A=\pi r^2$

Circumference of the circle $C = 2 \pi r$

Let us re-write the equation of area of circle:

$A=\pi r^2$

$A = \pi \times r \times r$

Multiplying and dividing with 2:

$A = \dfrac{2\pi r}{2} \times r\\\text{Putting }2\pi r = C:\\\Rightarrow A = \dfrac{C}{2} \times r\\\text{Multiplying and dividing by } 2\pi:\\\Rightarrow A = \dfrac{C}{2} \times \dfrac{2\pi r}{2\pi}\\\text{Putting }2\pi r = C:\\\Rightarrow A = \dfrac{C \times C}{4 \pi}\\\Rightarrow A = \dfrac{C^2}{4 \pi}$

Hence, <em>A</em> in terms of <em>C</em> can be represented as:

$A = \dfrac{C^2}{4\pi}$

4 0

3 years ago

- help help help help help help help help help help

aleksandr82 [10.1K]

Answer:

b = -8

Step-by-step explanation:

6b = -42

Divide by 6 on both sides

b = -8

8 0

3 years ago

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Can somebody help me out ??

julia-pushkina [17]

Answer: y = -3/2x -5

explanation:
y = mx + b
7 = -3/2(-8)+b
7= 12 +b
subtract 12 on both sides
-5 = b

y = -3/2x - 5

3 0

2 years ago