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Maslowich
2 years ago
10

What is the standard form of y-7=-2(x+1)

Mathematics
1 answer:
densk [106]2 years ago
7 0
The standard form is 2x+y=5
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A family went to a restaurant for dinner. The bill before tax and tip was $52.78. The sales tax is
Sergeeva-Olga [200]

Answer:

B

Step-by-step explanation:

52.78×6.5%=3.43

52.78×18%=9.50

52.78+3.43+9.50=65.71

4 0
2 years ago
Find the apothem and area of a square with a radius of 9.
Nonamiya [84]

Answer:

I think the answer is 18 square or 324.

Step-by-step explanation:

6 0
2 years ago
A) Work out the value of 19 + 7 divided by 2-5
agasfer [191]

Answer: -8.66666666667

Step-by-step explanation: Do it step by step. So 19+7= 26

Then 2-5= 3

So 26 divided by -3 = -8.66666666667

8 0
2 years ago
The mean incubation time of fertilized eggs is 21 days. Suppose the incubation times are approximately normally distributed with
Korvikt [17]

Answer:

a) 20.16; b) 20.49 and 21.51

Step-by-step explanation:

We use z scores for each of these.  The formula for a z score is

z=\frac{X-\mu}{\sigma}.

For part a, we want the 20th percentile; this means we want 20% of the data to be lower than this. We find the value in the cells of the z table that are the closest to 0.20 as we can get; this is 0.2005, which corresponds with a z score of -0.84.

Using this, 21 as the mean and 1 as the standard deviation,

-0.84 = (X-21)/1

-0.84 = X-21

Add 21 to each side:

-0.84+21 = X-21+21

20.16 = X

For part b, we want the middle 39%.  This means we want 39/2 = 19.5% above the mean and 19.5% below the mean; this means we want

50-19.5 = 30.5% = 0.305 and

50+19.5 = 69.5% = 0.695.

Looking these values up in the cells of the z table, we find those exact values; 0.305 corresponds with z = -0.51 and 0.695 corresponds with z = 0.51:

-0.51 = (X-21)/1

-0.51 = X-21

Add 21 to each side:

-0.51+21 = X-21+21

20.49 = X

0.51 = (X-21)/1

0.51 = X-21

Add 21 to each side:

0.51+21 = X-21+21

21.51 = X

4 0
3 years ago
Simplify completely the quantity 3 times x to the 4th power plus 5 times x to the 2nd power plus 2 times x all over x. (2 points
BartSMP [9]
3x^3+5x+2 is the answer
5 0
3 years ago
Read 2 more answers
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