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Thepotemich [5.8K]
3 years ago
5

Jimmy and his family are on their way to visit some family friends who live 495 miles away from them. Based on the route they ch

ose, they expect to complete their trip in three days. The distances and average speeds for the first two days driven are shown below. • First day: 2 hours at an average speed of 30 miles per hour • Second day: 3 hours at an average speed of 65 miles per hour If the average speed on the third day is 60 miles per hour, how many more hours will it take for them to reach their family friends' home?
Mathematics
1 answer:
julsineya [31]3 years ago
5 0
That’s pretty hard questions
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SVETLANKA909090 [29]
11/2 * 16/9

11/1 * 8/9

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3 years ago
A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What size sample should be obtain
slega [8]

Answer: 8359

Step-by-step explanation:

The formula for sample size needed for interval estimate of population proportion :-

n=p(1-p)(\frac{z_{\alpha/2}}{E})^2

Given : The significance level : \alpha=1-0.95=0.05

Critical value : z_{\alpha/2}}=z_{0.025}=\pm1.96

Previous estimate of proportion : p=0.32

Margin of error : E=0.01

Now, the required sample size will be :-

n=0.32(1-0.32)(\frac{1.96}{0.01})^2=8359.3216\approx8359

Hence, the required sample size = 8359

5 0
3 years ago
Which of the following is the conjugate of a complex number with 2 as the real part and −8 as the imaginary part?
vampirchik [111]
The complex number is given as: 2-8i

So for conjugate, you just flip the sign of the imaginary part:

2+8i will be the answer
3 0
3 years ago
Read 2 more answers
The y-intercept of a parabola is 1, and its vertex is at (1,0). What function does the graph represent
Juliette [100K]
Wouldn’t be a quadratic right?
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3 years ago
Factor Completely: 3x2 + 9x - 30
enyata [817]

Answer:

3(x-2)(x+5)

Step-by-step explanation:

1. Factor out common term 3

3(x^2 +3x-10)

2. Factor (x^2 +3x-10)

3(x-2)(x+5)

8 0
3 years ago
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