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Mrrafil [7]
3 years ago
8

Please help me, thank you

Mathematics
1 answer:
alex41 [277]3 years ago
4 0

Answer:

B 90

Step-by-step explanation:

By basic rules, all angles in a rectangle equal 90°

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Fourteen seniors were asked how many minutes they spent on doing their homework the previous night. The data is displayed below.
Nadusha1986 [10]

Answer:

b

Step-by-step explanation:

We need to find the median of:-

73 75 87 65 69 62 81 64 68 101 74 71 89 87

First, we need to arrange the numbers in ascending order as below:-

62, 64, 65, 68, 69, 71, 73, 74, 75, 81, 87, 87, 89, 101

Since there are a total of 14 numbers, let's split it up into two halves (each of seven numbers)

62, 64, 65, 68, 69, 71, 73           |||             74, 75, 81, 87, 87, 89, 101

The median would be the mean of the two middle numbers i.e. the mean of 73 and 74

Median = \frac{73+74}{2}

= \frac{147}{2}

= 73.5

So, about half of the students spent less than 73.5 minutes doing homework and about half spent more than 73.5 minutes on homework

7 0
3 years ago
Read 2 more answers
7. A machine produces 900 light bulbs in 1 hour.<br> The rate is ___________ light bulbs per minute.
Ilia_Sergeevich [38]

Answer:

15

Step-by-step explanation:

900 light bulbs per hour

60 minutes per hour

X lightbulbs per minute

Divide 900 lightbulbs by 60 minutes

15

The rate is 15 light bulbs per minute

8 0
2 years ago
Solve the equation 2x-3 (x-2)-5=2
klemol [59]

Answer:

x = -1

Step-by-step explanation:

If you have any questions about the way I solved it, don't hesitate to ask me in the comments below ÷)

7 0
3 years ago
X^2=14x-49. i just dont know how to do the steps to solve this equation
KonstantinChe [14]
x^2=14x-49 \\ \\ x^2 - 14x + 49 = 0 \ / \ move \ terms \\ \\ x^2 - 2(x)(7) + 7^2 = 0 \ / \ rewrite \\ \\ (x - 7)^2 = 0 \ / \ square \ of \ difference \ method \\ \\ x - 7 = 0 \ / \ square \ root \ each \ side \\ \\ x = 7 \ / \ add \ 7 \\ \\

The answer is: x = 7.
5 0
3 years ago
Monica is counting books she has three stacks of some number of books and then 5 more books off to the side. Write a. Expression
AlladinOne [14]

Answer: n= number of books

n+5=?

Step-by-step explanation:

7 0
3 years ago
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