Answer:
20 mph
Step-by-step explanation:
First problem:
The new speed is 26 mph.
The old speed was x.
The new speed is 30% higher than the old speed.
1.3x = 26
x = 20
Answer: 20 mph
Second problem:
A number, perhaps a percent or a fraction, is missing from the problem.
Answer:
x=5/84
Step-by-step explanation:
Answer:
a. A completely randomized design experiment
Step-by-step Explanation:
An experiment that is completely randomised is practically an effective way of controlling and reducing the influence of the confounding variables in a research study, especially when you have a sample that is large enough.
Randomisation will ensure that both the group that will wear the new shoe (treatment group) and the group that will not wear the new shoe (control group) will have averagely the same values for age and height. This will eliminate the chances of these confounding variables of correlating with the independent variable in the study, as there would be no difference, in terms of characteristics, between both groups.
Answer:
y=2x+2
Step-by-step explanation:
The equation will be y=2x+b. Note the slope is 2, since this line is parallel to y=2x+14.
Substitute (2,6) in it and we get 6=2(2)+b
6=4+b
b=2
So y=2x+2