Need help!!!!!!!!!!!!!!

I need help with this one, it has fractions

Georgia [21]

Answer:

$\huge\boxed{-6m+8}$

Step-by-step explanation:

$=(\frac{2}{3})(-9m+12)$

$(\frac{2}{3})(-9m)+(\frac{2}{3})(12)$

$=-6m+8$

$Thus, the~third~option ~is~correct.$

5 0

3 years ago

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The z-statistic for a sample of delmar's practice times is 1.41. how should this statistic be interpreted in terms of the hypoth

mafiozo [28]

Answer: c) There is not enough evidence to reject H0

Step-by-step explanation:

7 0

3 years ago

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Customers experiencing technical difficulty with their Internet cable hookup may call an 800 number for technical support. Itake

Paladinen [302]

Answer:

(A) The percent of the problems takes more than 5 minutes to resolve is 60.87%.

(B) The problem solving time will be 50% as long as the difference between the two end points is 5.75.

(C) a = 0.50 minutes, b = 12 minutes.

(D) Mean = 6.25 minutes, Standard deviation = 3.32 minutes

Step-by-step explanation:

Let the random variable X represent the time it takes the technician to resolve the problem.

The random variable X follows an Uniform distribution with parameters a = 0.50 minutes and b = 12 minutes.

The probability density function of X is:

$f_{X}(x)=\frac{1}{b-a};\ a$

(A)

Compute the probability that the problems takes more than 5 minutes to resolve as follows:

$P(X>5)=\int\limits^{12}_{5}{\frac{1}{12-0.50}}\, dx$

$=\frac{1}{11.50}\cdot \int\limits^{12}_{5}{1}\, dx \\\\=\frac{1}{11.50}\cdot [x]\limits^{12}_{5}\\\\=\frac{1}{11.50}\cdot [12-5]\\\\=\frac{7}{11.50}\\\\=0.608696\\\\\approx 0.6087$

Thus, the percent of the problems takes more than 5 minutes to resolve is 60.87%.

(B)

Let the middle 50% of the problem-solving times be between u and v.

Then,

P (u < X < v) = 0.50

$\int\limits^{v}_{u}{\frac{1}{12-0.50}}\, dx=0.50\\\\\frac{1}{11.50}\cdot \int\limits^{v}_{u}{1}\, dx=0.50\\\\\frac{v-u}{11.50}=0.50\\\\(v-u)=5.75$

Thus, the problem solving time will be 50% as long as the difference between the two end points is 5.75.

(C)

The interval in which the technician can solve the problem is 30 seconds to 12 minutes.

So, the values of a and b in minutes is:

a = 30 seconds = 0.50 minutes

b = 12 minutes.

(D)

The mean time is:

$\mu=\frac{a+b}{2}=\frac{0.50+12}{2}=6.25\ \text{minutes}$

The standard deviation of the time is:

$\sigma=\sqrt{\frac{(b-a)^{2}}{12}}=\sqrt{\frac{(12-0.50)^{2}}{12}}=3.3197\approx 3.32\ \text{minutes}$

5 0

3 years ago

10 qt into gallons and quarts

Inga [223]

Answer:

qt is quarts so it would be 10 quarts and 2.5 gallons is 10 quarts

Step-by-step explanation:

4 0

4 years ago

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The absolute value of—

Alona [7]

Answer:

A

Step-by-step explanation:

The absolute value of -30 is 30. -15 is less than half of that because half of 30 is 15 and -15 is less than that.

Hope this helped and have a great day!

(Vote this brainliest please)

4 0

4 years ago

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