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Maurinko [17]
3 years ago
6

-4+8(7+×) is equivalent to

Mathematics
1 answer:
Helen [10]3 years ago
7 0
-4+56+8x= 8x+52
8x+1w is the answer
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Please please help!!
sweet-ann [11.9K]

Answer:

4

Step-by-step explanation:

12/2=6

20/2=10

10-6=4

7 0
2 years ago
What is <br> 7c — 3 &lt; — 7с — 28
Helga [31]

Answer:

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
The average amount of time that students use computers at a university computer center is 36 minutes with a standard deviation o
frosja888 [35]

Answer:

2119 students use the computer for more than 40 minutes. This number is higher than the threshold estabilished of 2000, so yes, the computer center should purchase the new computers.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 36, \sigma = 5

The first step to solve this question is finding the proportion of students which use the computer more than 40 minutes, which is 1 subtracted by the pvalue of Z when X = 40. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{40 - 36}{5}

Z = 0.8

Z = 0.8 has a pvalue of 0.7881.

1 - 0.7881 = 0.2119

So 21.19% of the students use the computer for longer than 40 minutes.

Out of 10000

0.2119*10000 = 2119

2119 students use the computer for more than 40 minutes. This number is higher than the threshold estabilished of 2000, so yes, the computer center should purchase the new computers.

8 0
3 years ago
Find the angle x (in degrees) that the wheelchair ramp makes with the ground.​
iogann1982 [59]

Answer:

x=175

Step-by-step explanation:

The sum of all the degrees in a triangle is 180. First, you have to rind what the third degree of the triangle is. We will call this y.

85+90+y=180

175+y=180

y=5

The floor is flat, so it will be 180 degrees, therefore, x+y=180. We can substitute 5 in for y, so 5+x=180.

So, x would be 175.

8 0
3 years ago
What is the value of the expression 8 to the 3 power​
kari74 [83]

Answer:

  • 512

Step-by-step explanation:

<u>8 to the 3 power​ is</u>

  • 8³ =
  • 8*8*8 =
  • 512
4 0
3 years ago
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