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Mashutka [201]
3 years ago
5

What number would you add to both sides of x2 + 7x = 4 to complete the square?  A.2^2 B.7^2 C, 7^2/2 D.(7/2)^2

Mathematics
1 answer:
Lostsunrise [7]3 years ago
7 0
The answer is d. (7/2)^2
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Can someone help with this question
Reptile [31]
Question # 55

We can see the trend from the given graph. From Monday to Thursday the price kept on decreasing while on Friday it increased. So first the price decreased and then increased.

Therefore, the correct answer to this question is option C. The price decreased at the beginning of the week and then increased at the end of the week.

Question # 56.

The schedule of athlete allows no more than 75 minutes of training. This means the training time is 75 minutes or less. One round of strength training requires 8 minutes. So s rounds of strength training will require 8s minutes. One round of endurance training require 12 minutes, so e rounds of endurance training will require 12e minutes.

The total time of both these trainings can be written as:

8s + 12e

We know that the time can be 75 minutes or lesser. So we can write the inequality as:

8s + 12e ≤ 75

So, option H is the correct answer

Question 57

The given equation is:

2y = - 3(x - 2)

In order to identify the slope we need to write the equation if slope intercept form. When written in slope intercept form, the coefficient of x term is the slope of the line. In order to write in slope intercept form, isolate y on one side as shown below:

2y=-3(x-2) \\  \\ 
2y=-3x+6 \\  \\ 
y=- \frac{3}{2}x+3

So, the slope of line is -3/2.

Hence option B is the correct answer

4 0
3 years ago
Supermarket manager arranged 10 rows of cans. he puts 2 cans in the first row, 4 cans in the second row, and 6 cans in the third
ruslelena [56]
He put 10 cans in the 5th row. 1st-2, 2nd-4, 3rd-6, 4th-8, 5th-10
3 0
3 years ago
A random variable is not normally distributed, but it is mound shaped. It has a mean of 14 and a standard deviation of 3. If you
Over [174]

Answer:

Step-by-step explanation:

from the question,

the mean 14

the standard deviation is 3

and sample size is 10.

since the n which is the sample size is 10, then the distribution is mound shaped.

why?

this is due to the fact that the random variable from which we took the sample is mound shaped.

The sampling distribution of the mean is normally distributed although the question says the random variable is not normally distributed. so the shape is bell shaped and normally distributed.

the standard deviation of the mean is

3/√10

= 0.948

5 0
3 years ago
What is the slope of the trend line in the scatterplot? Show work
Tom [10]

Answer:

y = -5x + 90

Step-by-step explanation:

y = mx + b is slope intercept form

b is the y intercept, meaning that 90 is the y-intercept

m is the slope (rise over run), 20/4, 5/1, 5

y = -5x + 90

this wasnt the best explanation but I hope it helped

3 0
3 years ago
Can someone help me with this question pls (8th grade math)
Serggg [28]

Answer:

The mapping is very disorganized and jumbled.

8 0
3 years ago
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