The fraction model below shows the steps a student performed to find a quotient. Which statement best interprets the quotient?

Mathematics

2 answers:

vaieri [72.5K]3 years ago

7 0

Answer:

Step-by-step explanation:

Assuming the 3/8 markers are counting the lines on the number line, not the chunks in between the lines, there are 7 markers that are in the shaded area and another half distance between two markers at the end.

son4ous [18]3 years ago

7 0

Answer: A

Step-by-step explanation:

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Rileys parents got a cell phone plan that has a $40 monthly fee for the first phone. For each extra phone, there is a $15 phone

Solnce55 [7]

Okay. So when it comes to combining like terms, they should have the same variable and power. They dont have to be the exact same number, but they should at least have the same terms. In the expression 40 + 15e + 10e, 15e and 10e both have like terms, because they have the same variable. 15e + 10e is 25e. 40 has no like term, so that is left alone. The expression simplified is 40 + 25e.

5 0

3 years ago

Q-r=r solve for r<br>Please can someone explain this to me

AVprozaik [17]

Q - r = r
Flip
r = Q - r
Add r to both sides
2r = Q
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Have an awesome day! :)

6 0

3 years ago

The following function is probability mass function. f left-parenthesis x right-parenthesis equals StartFraction 2x plus 1Over 2

lora16 [44]

Answer:

a) Mean = 2.6

B) Variance = 9.2

Step-by-step explanation:

We are given the following probability mass function in the question:

$F(x) = \dfrac{2x+1}{25}, x = 0,1,2,3,4$

a) Mean of random variable

$\mu = \displaystyle\sum x_iF(x_i)\\\\=0(\dfrac{1}{25}) + 1(\dfrac{2+1}{25}) + 2(\dfrac{4+1}{25}) + 3(\dfrac{6+1}{25}) + 4(\dfrac{8+1}{25})\\\\=\dfrac{3+10+21+36}{25} = \dfrac{70}{25} = 2.8$

b) Variance of the random variable

$\sigma^2 = \displaystyle\sum x_i^2F(x_i)\\\\=0^2(\dfrac{1}{25}) + 1^2(\dfrac{2+1}{25}) + 2^2(\dfrac{4+1}{25}) + 3^2(\dfrac{6+1}{25}) + 4^2(\dfrac{8+1}{25})\\\\=\dfrac{3+20+63+144}{25} = \dfrac{230}{25} = 9.2$