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3 years ago

Erin received the following scores on her last four spelling tests.

Mathematics

2 answers:

Alik [6]3 years ago

7 0

Answer: 0.8 I think...

Step-by-step explanation:

Well in order to change those numbers into a percent, to move the decimal two times to the right or left.

82% is already a decimal.

0.8 = 80% because you move the decimal two times to the right.

2125 = 21.25 because you move the decimal two times to the left

1720 = 17.20 because you move the decimal two times to the left

Tatiana [17]3 years ago

4 0

The second one, 82% is Erin's highest score

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Evaluate the expression. P(9, 3) · P(5, 4)

boyakko [2]

Answer:

$P(9,3) *P(5,4)$

And if we use the permutation formula given by:

$nPx = \frac{n!}{(n-x)!}$

And replacing we got:

$\frac{9!}{6!} \frac{5!}{4!}= 504*5 = 2520$

Step-by-step explanation:

For this problem we want to find the following expressionÑ

$P(9,3) *P(5,4)$

And if we use the permutation formula given by:

$nPx = \frac{n!}{(n-x)!}$

And replacing we got:

$\frac{9!}{6!} \frac{5!}{4!}= 504*5 = 2520$

6 0

3 years ago

Greatest Common Factor (GCF)<br> 1. 12a - 27

Ilya [14]

Answer:

Step-by-step explanation:

The factors of 12a are ...

2×2×3×a

The factors of 27 are ...

3×3×3

The only common factor is 3.

_____

12a -27 = 3(4a -9)

8 0

3 years ago

How many hours of digging does it take for the depth of the hole to reach -28 feet

kirill [66]

Digging -28 would take 16 hours because 14 times 2 equals 28 and 8 times 2 equals 16 so answer is 16

6 0

3 years ago

Question Help

Daniel [21]

$\frac{2400}{400} = 6$

each shirt costs $6

$\frac{10 - 6}{6} \times 100 = 66.6666....$

The percent markup is about 66.7%

3 0

3 years ago

What is the volume of a sphere with a radius of 3 inches? 12π cubic inches 24π cubic inches 36π cubic inches 48π cubic inches

jek_recluse [69]

Answer:

12π cubic inches

Step-by-step explanation:

Volume = (4/3)πr^3

V = (4/3)π9

V = (36/3)π

V = 12π

8 0

3 years ago