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3 years ago

13

Two buses leave Houston at the same time and travel in opposite directions. One bus averages 55 mi/h and the other bus averages

45 mi/h. When will they be 400 mi apart?

1 answer:

Veronika [31]3 years ago

6 0

Well you can just keep adding 55 =1hr until you get to 400 the same with 45

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Simplify these fraction 9 1/3-5 3/4

poizon [28]

Answer : 3 7/12

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3 years ago

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12. A flat, square roof needs a square patch in the corner to seal a leak. The side length of

NISA [10]

Answer:

Step-by-step explanation:

Area of the good part= area of whole roof - area of bad part

Since the roof is a square roof, the area will be calculated using the formulae for area of a square

Area of a square =length²

Area of good part =(x+12)²-x²

A= {(x+12)(x+12)} - x²

A = (x²+12x+12x+144) -x²

Open the bracket and rearrange the equation

A= x²-x²+24x+144

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3 years ago

What is the best estimate of the area of the figure if each square has a side length of 1 mm?

Tanya [424]

29 square inches

Step-by-step explanation:

5 x 5 = 25

Triangles = 0.5

25 + 2 = 27

27 + (4 x 0.5)

27 + 2 =29

6 0

3 years ago

Workers are installing new seats in the football stadium with the team colors.Starting with the first row, every sixth row of se

evablogger [386]

Answer:

red cuz its an odd number so every even number row is blue

Step-by-step explanation:

3 0

2 years ago

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A student believes that less than 50% of students at his college receive financial aid. A random sample of 120 students was take

marusya05 [52]

Answer:

p= 0.9995 and we can conclude that students receiving aid is more than 50% according to the sample results in 2% significance level.

Step-by-step explanation:

$H_{0}$ : less than or equal 50% of students at his college receive financial aid

$H_{a}$ : more than 50% of students receive financial aid.

According to the nul hypothesis we assume a normal distribution with proportion 50%.

z-score of sample proportion can be calculated using the formula:

z= $\frac{X-M}{\frac{s}{\sqrt{N} } }$ where

X is the sample proportion (0.65)
M is the null hypothesis proportion (0.5)
s is the standard deviation of the sample ( $\sqrt{0.5*(1-0.5)}$ )
N is the sample size (120)

then z= $\frac{0.65-0.50}{\frac{\sqrt{0.25}}{\sqrt{120} } }$ ≈ 3,29

thus p= 0.9995 and since p<0.02 (2%), we reject the null hypothesis.

4 0

3 years ago