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worty [1.4K]
3 years ago
8

WHO CAN HELP AT LEAST ONEBOF THEM I NEED HELP ASAP

Mathematics
1 answer:
lapo4ka [179]3 years ago
4 0

Answer:

9. n=-15 , 10. f=6, sorry i can't help you more I am just tired and have to get some rest but i hope this helps

Step-by-step explanation:

9. Eight less than 1/3 a number n is -13

so -13 = 1/3n -8

then

-5 = 1/3n

multiply 3 to each side

-15 = n

10. a number f multiplied by -12.3 is -73.8

so -12.3f= -73.8

divide -12.3 on each side

so f=6

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Professor Liu gave the same quiz to the students in her morning class and in her afternoon class. The average (arithmetic mean)
natka813 [3]

Answer:

Afternoon class has more students.

Step-by-step explanation:

Let m be the number of students in the morning class and n be the number of students in the afternoon class.

The average score for the students in the morning class was 80, then the sum of their scores is 80m.

The average score for the students in the afternoon class was 86, then the sum of their scores is 86n.

The sum of the scores of both classes is

80m+86n

and the average score is

\dfrac{80m+86n}{m+n}

The average (arithmetic mean) score for the two classes combined was 84, then

\dfrac{80m+86n}{m+n}=84\\ \\ 80m+86n=84m+84n\\ \\86n-84n=84m-80m\\ \\2n=4m\\ \\n=2m

This means n is greater, so afternoon class has more students.

7 0
3 years ago
The United States Postal Service charges a
lions [1.4K]

Answer:

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6 0
3 years ago
Thank you whoever answers! <br>^ ^​
Ivanshal [37]

Answer:b

Step-by-step explanation:

Isolating means leaving something on one side of the equation. In this situation, one has to subtract the 2t from both sides

6 0
3 years ago
(-3c+6) + (-c+8) simplify with a step by step please
mel-nik [20]

Step-by-step explanation:

= ( - 3c + 6) + ( - c + 8)

=  - 3c + 6 - c + 8

=  - 3c - c + 6 + 8

= -4c + 14

hence -4c + 14 is the answer ...

hope it helped !!

6 0
2 years ago
Can we get the steps please?
evablogger [386]
Using the Slope Equation
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3 0
3 years ago
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