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Inessa [10]
3 years ago
7

janet completed 8 math problems in 10 minutes. How long per question did janet spend(in minutes and seconds)?

Mathematics
2 answers:
Dominik [7]3 years ago
5 0
It would take 1.25 minutes to complete each problem because 10 divided by 8 equals 1.25
Xelga [282]3 years ago
5 0

Answer:1.25 minutes


Step-by-step explanation:


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Use an algebraic approach to solve the problem.
qaws [65]

Answer:

Her first exam score was a 78, her second exam score was a 89, and his third exam score was a 94.

Step-by-step explanation:

Use the formula for the mean: sum of elements / number of elements

Let x represent her first exam score.

Her second exam score can be represented by x + 11, since it was 11 points better than her first.

Her third exam score can be represented by (x + 11) + 5, since it was 5 points better than her second.

Plug in all of these expressions into the mean formula. Plug in 87 as the mean, and plug in 3 as the number of elements (since there are 3 scores):

mean = sum of elements / number of elements

87 =  ( (x) + (x + 11) + (x + 11) + 5 ) / 3

Add like terms and solve for x:

87 = (3x + 27) / 3

261 = 3x + 27

234 = 3x

78 = x

So, her first score was a 78.

Find her second score by adding 11 to this:

78 + 11 = 89

Find her third score by adding 5 to the second score:

89 + 5 = 94

Her first exam score was a 78, her second exam score was a 89, and his third exam score was a 94.

6 0
3 years ago
If n=37 cm and l=12 cm what is the length of m
n200080 [17]

Answer:35

Step-by-step explanation:

4 0
3 years ago
Phoebe was seling orchestra and balcony tickets for
Veronika [31]

Answer:

A. day 12

Step-by-step explanation:

because that is when both lines meet

brainliest please :)

3 0
2 years ago
What is the slope of the line on the graph?
podryga [215]

Answer:

3

Step-by-step explanation:

3 0
2 years ago
Write the standard form of the equation of each line.<br><br> 1. y= -2/5x+1<br> 2. y+3 = -3/2(x+1)
gavmur [86]

Answer:

1. 2x + 5y = 5

2. 3x + 2y = -9

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
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