Answer:
Step-by-step explanation:
(a) Let x represent the length of the first side. Then the second side is (x+4) and the third side is (x+3). The perimeter is ...
x + (x+4) +(x+3) = 15
3x = 8 . . . . collect terms, subtract 7
x = 2 2/3 . . . . divide by 3
The third side is x+3 = 5 2/3 inches.
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(b) For this, we are told the second side is S, so we have ...
S = (x+4)
x = S -4 . . . . . subtract 4 to solve for x
Using this in our expression (in part (a)) for the third side, we have ...
third side = (x +3) = (S -4) +3
third side = S -1
make 1 3/4 an improper fraction:
1 3/4 = 7/4
now you have 4/7 divided by 7/4
now reverse the 7/4 and multiply:
4/7 x 4/7 = 16/49
This may be 3 or it also may be 3
15% of 14.25.....turn percent to decimal..." of " means multiply
0.15(14.25) = 2.1375 rounds to 2.14....its B
Answer:
4.0486
Step-by-step explanation:
The margin of error is calculated using 
Where n=60 is the sample size and 
is the population standard deviation.
The critical value corresponding to 95% confidence interval is 
We substitute the values to obtain;
