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lubasha [3.4K]
3 years ago
10

Solar energy is considered by many to be the energy of the future. A recent survey was taken to compare the cost of solar energy

to the cost of gas or electric energy. Results of the survey revealed that the distribution of the amount of the monthly utility bill of a 3-bedroom house using gas or electric energy had a mean of $120 and a standard deviation of $11. If the distribution can be considered bell shaped, what percentage of homes will have a monthly utility bill of more than $109? Group of answer choices approximately 16% approximately 32% approximately 84% approximately 95%
Mathematics
1 answer:
ycow [4]3 years ago
8 0

Answer:

The answer is 132

Step-by-step explanation:

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Add.<br> (3х – 4) + (4х – 6)<br><br> А. 7х+ 10<br> В. 7х+2<br> C. 7х- 2<br> D. 7x - 10
LuckyWell [14K]

Answer:

D

Step-by-step explanation:

Because you have to do work

3 0
2 years ago
A machine makes 18 parts per hour if the machine work for 24 hourss how many parts will it have made
sweet-ann [11.9K]

Answer:

432 parts

Step-by-step explanation:

24 x 18 = 432

3 0
2 years ago
Atile factory earns money by charging a flat fee for delivery and a sales price of $0.25 per tile. One customer paid a
Vesnalui [34]

Answer: the first one is C

the second one is B

5 0
3 years ago
(4÷y+2) +(2÷y-3) =(6÷y+6)
Evgesh-ka [11]
<span>Simplifying 4(y + -3) = 6(y + 2) Reorder the terms: 4(-3 + y) = 6(y + 2) (-3 * 4 + y * 4) = 6(y + 2) (-12 + 4y) = 6(y + 2) Reorder the terms: -12 + 4y = 6(2 + y) -12 + 4y = (2 * 6 + y * 6) -12 + 4y = (12 + 6y) Solving -12 + 4y = 12 + 6y Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-6y' to each side of the equation. -12 + 4y + -6y = 12 + 6y + -6y Combine like terms: 4y + -6y = -2y -12 + -2y = 12 + 6y + -6y Combine like terms: 6y + -6y = 0 -12 + -2y = 12 + 0 -12 + -2y = 12 Add '12' to each side of the equation. -12 + 12 + -2y = 12 + 12 Combine like terms: -12 + 12 = 0 0 + -2y = 12 + 12 -2y = 12 + 12 Combine like terms: 12 + 12 = 24 -2y = 24 Divide each side by '-2'. y = -12 Simplifying y = -12</span>
3 0
3 years ago
(m^-4/3)^1/4 divided by m^0 n^3/4(m^-3/2 n^2)
postnew [5]
\frac{(m^{-\frac{4}{3}})^{\frac{1}{4}}}{m^{0}(m^{-\frac{3}{2}}n^{2})} = \frac{m^{-\frac{1}{3}}}{m^{-\frac{3}{2}}n^{2}} = \frac{m^{\frac{3}{2}}}{m^{\frac{1}{3}}n^{2}} = \frac{m^{\frac{7}{6}}}{n^{2}} = \frac{\sqrt[6]{m^{7}}}{n^{2}} = \frac{\sqrt[6]{m^{6} * m}}{n^{2}} = \frac{\sqrt[6]{m^{6}}\sqrt[6]{m}}{n^{2}} = \frac{m\sqrt[6]{m}}{n^{2}}
6 0
3 years ago
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