Answer:
D. 55%
Step-by-step explanation:
The error range ± 9% means that the range is 9% below 62% or 9% above 62%.
The range is:
(62% - 9%) to (62% + 9%)
53% to 71%.
The only answer between 53% and 71% is 55%.
Answers A, B, C are all greater than 71%.
X^2 - 8x + 13 = 0
subtract 13 from both sides
x^2 - 8x = -13
-8/2 = -4, (-4)^2 = 16, add 16 to both sides
x^2 - 8x + 16 = -13 + 16
factor the left side
(x - 4)^2 = 3
The expression that we need to get is:
![N = \frac{(23)*(10.4) + (10.5)*(7.2)}{200}](https://tex.z-dn.net/?f=N%20%3D%20%5Cfrac%7B%2823%29%2A%2810.4%29%20%2B%20%2810.5%29%2A%287.2%29%7D%7B200%7D)
So the correct option is the second one.
<h3>Which expression gives the number of gallons of stain Bradley will need?</h3>
We know that 1 gallon is enough to cover 200 ft².
We have two rectangular areas, one of:
23 feet by 10.4 feet, and other of 10.5 feet by 7.2 feet.
Then the total area is:
A = (23 ft)*(10.4 ft) + (10.5ft)*(7.2 ft)
The number of gallons needed is given by the quotient between the area that we want to cover, and the area that covers one gallon, so the expression is:
![N = \frac{(23ft)*(10.4ft) + (10.5ft)*(7.2ft)}{200ft^2} \\\\N = \frac{(23)*(10.4) + (10.5)*(7.2)}{200}](https://tex.z-dn.net/?f=N%20%3D%20%5Cfrac%7B%2823ft%29%2A%2810.4ft%29%20%2B%20%2810.5ft%29%2A%287.2ft%29%7D%7B200ft%5E2%7D%20%5C%5C%5C%5CN%20%3D%20%5Cfrac%7B%2823%29%2A%2810.4%29%20%2B%20%2810.5%29%2A%287.2%29%7D%7B200%7D)
So the corerect option is the second one.
If you want to learn more about algebraic expressions:
brainly.com/question/4344214
#SPJ1
reduce the index of the radical and exponent with 3, rhen you get your answer, 6
Answer:
so lets just rewrite it with A=-3 amd B=-2
(-9^4^-9^2^5)^2
which is equal to... 1!
Hope This Helps!!!