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3 years ago

Solve equations using inverse operations HELP NOW!!

Mathematics

2 answers:

aev [14]3 years ago

4 0

Algebra

The inverse of -9n is dividing by -9.

$n = - 5$

Levart [38]3 years ago

4 0

Answer:

n=−5

Step-by-step explanation:

what we have −9n=45

we divide -9 on both sides:

−9n/-9 =45/-9

n=−5

Hope this is right!

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Three classes have the same number of students. The teachers compared attendance on one Friday. Mr. Lopez had 92.5% of his stude

Sunny_sXe [5.5K]

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Suppose the number of students in one of the classes is :

$x$

So ;

$Mr.Lopez \: \: had \: \: \frac{92.5}{100}x \\$

_________________________________

$Mrs.Foster \: \: had \: \: \frac{19}{20} x \\$

So :

$Mrs.Foster \: \: had \: \: \frac{19 \times 5}{20 \times 5} x \\$

$Mrs.Foster \: \: had \: \: \frac{95}{100}x \\$

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$Ms.Kelly \: \: had \: \: 0.9x$

$Ms.Kelly \: \: had \: \: \frac{9}{10} x \\$

$Ms.Kelly \: \: had \: \: \frac{90}{100} x \\$

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Compare :

$\frac{95}{100} x > \frac{92.5}{100} x > \frac{90}{100} x \\$

Thus :

$Mrs.Foster’s \: \: class \: > \: Mr.Lopez’s \: \: class \: > \: Ms.Kelly’s \: \: class \\$

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8 0

3 years ago

jeni works from 8:00-3:15 three days in a row, only taking a half-hour unpaid lunch break each day. if she is paid $15 per hour,

enyata [817]

Jeni gets paid $ 303.75 for 3 days

Solution:

Given that,

Jeni works from 8:00-3:15 three days in a row

Find the number of hours between 8 : 00 to 3 : 15

8 : 00 to 3 : 15 = 7 hours 15 minutes

She is taking half-hour unpaid lunch break each day

7 hours 15 minutes - half an hour = 6 hours 45 minutes

So, she works for 6 hours 45 minutes for each three days

$6\ hours\ 45\ minutes = 6 + \frac{45}{60} = 6 + 0.75 = 6.75\ hours$

She is paid $15 per hour

Therefore, total earnings for 3 days is given as:

$Total\ Earnings = 3 \times 15 \times 6.75\\\\Total\ Earnings = 303.75$

Thus she gets paid $ 303.75 for 3 days

7 0

3 years ago

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natulia [17]

Your answer is A :))))

4 0

3 years ago

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Solve for s.

andre [41]

2/3s+5/6s=21
If you do the problem without the variable the equation equals 1.5.
After I did that I divided 21 with 1.5 then it had come to a total of 14.
After that I decided to plug in 14 in the equation and the total came out to be 21.So s =14

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4 years ago

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yuradex [85]

Answer:

Step-by-step explanation:

B-aby you got the stuff

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3 years ago

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