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2 years ago

4. If 90 is 30% of a number, what is 200% of the number?

Mathematics

2 answers:

Softa [21]2 years ago

6 0

Answer:

Step-by-step explanation:

90=30%x

x=30

200%x=2x=60

masha68 [24]2 years ago

3 0

Answer:

600

Step-by-step explanation:

30%=0.3

0.3x=90

x=90/0.3=300

200%=2

2(300)=600

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Quadratic equations<br> m^2-12=m

prisoha [69]

Step-by-step explanation:

m² -12 = m

m² = m + 12

m = $\sqrt{m + 12\\}$

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2 years ago

Suppose you took eight math tests this semester. If your average score on your first six tests was 84 and your average score on

iris [78.8K]

Answer: 92

Step-by-step explanation:

Formula : Sum of first n numbers = Average x n

Given: Average score on first 6 tests= 84

A score on all 8 tests = 86

Then, Sum of first 6 numbers = 84 x 6 = 504

Sum of first 8 numbers = 86 x 8 = 688

Sum of two last numbers = (Sum of first 8 numbers) - (Sum of first 6 numbers)

= 688-504

=184

Average of last two numbers = (Sum of two last numbers )÷2

= 184÷2

= 92

Hence, the average of your last two test scores = 92.

8 0

2 years ago

The sum of two numbers is 29 and their difference is 5 what are the two numbers

qwelly [4]

Well first subtract 29 - 5 = 24
Therefore, 24 + 5 = 29
And 29 - 24 = 5

3 0

3 years ago

Read 2 more answers

A box contains 6 red and 8 green marbles. You reach in and remove 3 marbles all at once.

bonufazy [111]

Answer: $\frac{5}{91},\frac{38}{182}$

Step-by-step explanation:

(a)Probability that these three marbles are all red

choosing 3 red out of 6 is given by $^6C_3$

and choosing 3 marble from 14 marbles= $^{14}C_3$

$Probability=\frac{^6C_3}{^{14}C_3}=\frac{5}{91}$

(b)All of same color

It is possible when they are of either red or green

For red it is $\frac{^6C_3}{^{14}C_3}$

For Green it is

$\frac{^8C_3}{^{14}C_3}$

total= $\frac{^6C_3}{^{14}C_3}+\frac{^6C_3}{^{14}C_3}$

= $\frac{38}{182}$

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3 years ago

Sandy and Maria worked the following weekly hours this summer at a summer camp. Which of the following statements are true?

LiRa [457]

Answer: A.

Step-by-step explanation:

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3 years ago