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Sedaia [141]
3 years ago
7

Help me please and thank you

Mathematics
1 answer:
Yuri [45]3 years ago
4 0

Answer:

A

Step-by-step explanation:

Solution is in this picture.

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The average speed to go by car from home to college is 30 miles per hour. The average speed to go back home from college is 20 m
Levart [38]

Answer:

24 mph for both 60 miles and 40 miles.

Step-by-step explanation:

We need to find how long it takes to get to college and from it.

Speed x time (x) = Distance (60)

30x = 60

x=2

It takes two hours to get to college

20x = 60

x = 3

It takes 3 hours to get back. It's a total of 5 hours, 2 hours at 30mph and 3 at 20. Now we need to find the average

30+30+20+20+20=120

120/5= 24

The average speed for the round trip is 24.

To do the second part, we follow the same process, but replace 60 with 40 for distance.

30x=40

x= 1.33

20x=40

x=2

We can add the total distance and divide by total time to find the average.

The total distance is 80. Time is 3.33

80/3.33=24

The average speed is still 24.

3 0
3 years ago
Select the appropriate technique with the problem you are looking for.
Alenkinab [10]

Answer:

A, B, C, D

Step-by-step explanation:

(A) Checking the Equal Variance Assumption, the appropriate technique to use is:

- The ANOVA (Analysis of Variance) F test

- Plot residuals against fitted values

(B) Checking the Normal Assumption, the appropriate techniques to use are:

- Test for Kurtosis & Skewness

- Kolmogorov-Smirnov Test

- Q-Q Plots (the graphical method) also known as Quantile Plot

- Do not use a histogram; it is not advisable

(C) Checking for Model Misspecification, the appropriate techniques to use are:

- The Ramsey Regression Specification Error Test; also called RESET

- The Davidson & MacKinnon J. Test

(D) Checking for dependent errors, the appropriate technique to use is:

- Plot residuals against time variables

6 0
3 years ago
What is f(-3) if f(x) = 12x + 1] + 5?<br><br> Α. 0<br><br> B. 10<br><br> C. 12<br><br> D. -10
alexgriva [62]
Use the given functions to set up and simplify
f
(
−
3
)
f
(
-
3
)
.
−
35
3 0
3 years ago
if each border paving stone costs $4.75, how much will the stones on the border of the patio cost if there are 324 paving stones
8_murik_8 [283]

Answer:

If there are 324 paving stones, it will cost $1539

Step-by-step explanation:

324 x 4.75 = 1539

5 0
2 years ago
What is the answer to this question?
sukhopar [10]
First plug in f and g:
3 x^{2} +1-  [1-x]
Then distribute 3 x^{2} +1-1+x
Combine like terms
3 x^{2} +x
Now plug in 2 for x
3( 2^{2} )+2
3(4)+2=12+2=14

Hope that helps
8 0
3 years ago
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