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4 years ago

−n+(−3)+3n+5 combine like terms

Mathematics

1 answer:

Allushta [10]4 years ago

3 0

Answer:

(-3+5)+(3n-n) = 2+2n

Step-by-step explanation:

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mr Goodwill [35]

Answer:

Step-by-step explanation:

12)

Use the formula for simple interest, i = p r t, where i is the interest earned, r is the interest rate as a decimal fraction, and t is the time elapsed. Here,

i = $25 = p(0.015)(2), or $25 = 0.03p.

Dividing both sides by 0.03, we get p = $25/0.03, or p = $833.33

14)

Use the same formula: $45.60 = $2,400(0.038)t.

$45.60 $45.60

Then t = ------------------------- = ----------------------- = 2 (years)

($2,400)(0.038) 91.2

8 0

4 years ago

In math class, 4 students complete individual surveys to determine the percentage of high school teachers that have a second job

dlinn [17]

Answer:

Option D) B and C

Step-by-step explanation:

we know that

To find out the percentage of high school teachers that have a second job, divide the number of teachers that have a second job by the total number of teachers

Survey A

$\frac{28}{110}=0.2545$

Convert to percentage

$0.2545(100)=25.45\%$

Survey B

$\frac{27}{90}=0.3$

Convert to percentage

$0.3(100)=30\%$

Survey C

$\frac{21}{70}=0.3$

Convert to percentage

$0.3(100)=30\%$

Survey D

$\frac{32}{80}=0.4$

Convert to percentage

$0.4(100)=40\%$

Compare the percentages

Surveys B and C have the same percentage

therefore

Surveys B and C show proportional results, because the ratio of the number of teachers that have a second job by the total number of teachers is equal (this number is the constant of proportionality k in a proportional relationship between two variables)

8 0

3 years ago

Geometry math question no Guessing and Please show work thank you

hichkok12 [17]

we will use formula

$\theta=\frac{180(n-2)}{n}$