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Archy [21]
3 years ago
12

PLZ ANSWER IT HARD FOR ME

Mathematics
1 answer:
creativ13 [48]3 years ago
6 0
First you have to find a common denominator between all the fractions which would be 12 for the first week it would be reduced to 6 3/12 and the second 4 8/12 both added together would be 10 and 11/12 so the equation would be 15 4/12 - 10 11/12 which would be 4 5/12.
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F(x)=2x^2-5x+4 find f(-4) how do i do that?
Mars2501 [29]

Answer:

f(4)=2(x)^2-5(4)+4

Step-by-step explanation:

f(x) is basically just y, but it is also telling you what the value of x is. So if f(4) then that means that x is 4, so you can just replace x with 4 and simplify. Hope this helps :)

8 0
3 years ago
Read 2 more answers
Multiply and simplify 3a(4a^2 - 5a + 12)
elena-s [515]
3a(4a^2 - 5a + 12)=12a^3-15a^2+36a (C)
4 0
3 years ago
Random sample size of 81 are taken from an infinite population whose mean and standard deviation are 200 and 18, respectively. T
Ugo [173]

Answer:

the  mean and standard error of the mean are 200 and 2 respectively.

Step-by-step explanation:

Given that ;

the sample size n = 81

population mean μ = 200

standard deviation of the infinite population σ = 18

A population  is the whole set of values, or individuals you are interested in, from an experimental study.

The value of population characteristics such as the  Population mean (μ), standard deviation (σ) are said to be known as the population distribution.

From the given information above;

The sample size is large and hence based on the central limit theorem the mean of all the means is same as the population mean 200.

i.e

\mu = \bar \mu_x = 200

∴ The mean = 200

and the standard error of the mean can be determined via the relation:

\mathbf{standard \ error \ of \ mean = \dfrac{\sigma}{\sqrt {n}}}

\mathbf{standard \ error \ of \ mean = \dfrac{18}{\sqrt {81}}}

\mathbf{standard \ error \ of \ mean = \dfrac{18}{9}}

\mathbf{standard \ error \ of \ mean =2}

Therefore ; the  mean and standard error of the mean are 200 and 2 respectively.

6 0
3 years ago
Ajax is allowed to watch 2 hours of television on Saturday. Each episode of his favorite show lasts 30 minutes. How many episode
Lesechka [4]

Answer:

2 hours Total

30 minutes Each

1. 2 hours * 60 minutes (per hour)

  2 * 60 = 120 (total minutes allowed)

2. 120 (total) / 30 (each)

= 120 / 30 = 4 (number of shows

ANSWER: 4

Step-by-step explanation:

5 0
3 years ago
Ali is moving into her new apartment. Her bedroom on the floor plan is 3 inches. If the floor plan uses a scale of 1 inch = 4 fe
spayn [35]

Answer:

12 feet.

Step-by-step explanation:

1 inch = 4 feet.

Multiply 3 by 4.

3×4=12

I multiplied 3 by 4 because 1-inch equals 4 feet, which means if we multiply both terms by 3, you will get 3 inch = 12 feet.

Hope this helps!

3 0
2 years ago
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