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zmey [24]
3 years ago
5

Mr. Smith charged Jill $320 for parts and $150 per hour for labor to repair her bicycle. If he spent 3 hours repairing her bike,

how much does Jill owe him? Write an expression and show your work and answer.
Mathematics
1 answer:
nadezda [96]3 years ago
5 0

Answer:A repair bill for a car is $648.45. The parts cost $265.95. The labor cost is $85 per hour.

Step-by-step explanation:

had this question

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The number of square feet per house is normally distributed with a population standard deviation of 154 square feet and an unkno
11111nata11111 [884]

Answer: (1500.66,1599.34)

Step-by-step explanation:

Confidence interval for population mean:

\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}

,where \overline{x} = Sample mean , n= Sample size, z* = critical two tailed z-value , \sigma = population standard deviation.

As per given , we have

n= 16

\sigma = 154 square feet

\overline{x}= 1550 square feet

\alpha= 1-0.80 = 0.20

Critical z-value = z_{\alpha/2}=z_{0.2/2}=z_{0.1}=1.2815

Confidence interval for population mean:

1550\pm (1.2815)\dfrac{154}{\sqrt{16}}\\\\ = 1550\pm (1.2815)\dfrac{154}{4}\\\\= 1550\pm 49.33775\\\\ =(1550-49.33775,\ 1550+49.33775)\\\\\approx (1500.66,\ 1599.34)

Required confidence interval:  (1500.66,1599.34)

6 0
3 years ago
What is 15% of $48.32? Explain?
Elden [556K]
$48.32* (15/100)
= $7.25.

The final answer is $7.25~
5 0
3 years ago
Is suic!de a sin or is it not?
Effectus [21]
Yes it is a sin your life matters and god loves you god will take your life away when he wants to if you do subside you go to hell but I just want to let your know that you are loved and I pray that god helps you in any situation you are in the name of Jesus amen
6 0
3 years ago
Read 2 more answers
The formula for the area of a square is A = sa, where s is the length of a side.
Sliva [168]

Answer:

\sqrt{400} = 20

Step-by-step explanation:

Since the sides of a square are equal, A = s x s so taking the square root of the square provides the length of each side

6 0
2 years ago
The midpoint of AB is M(-2,5). If the coordinates of A are (1,7), what are the<br> coordinates of B?
ratelena [41]

Answer:

   (-5, 3)

Step-by-step explanation:

B = 2M - A

B = 2(-2, 5) -(1, 7) = (-4-1, 10-7) = (-5, 3)

5 0
3 years ago
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