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3 years ago

Plzz help Look at attachment it is choose all that apply you'll get 20 points

Mathematics

2 answers:

mariarad [96]3 years ago

7 0

Answer:

Step-by-step explanation:

150 - 120 = $ 30

For $30 , as per Plan A, he can watch 30÷5= 6movies

As per plan B, If Neil rents more than 6 movies, ie 7, 8 , .... then it would be a better buy

Ans: c and d

Dennis_Churaev [7]3 years ago

3 0

Answer:

7 purchases and above makes it the better buy.

Step-by-step explanation:

Plan B is $30 more than Plan A, but Plan A charges $5 per movie. 6 movies would cost $30, covering the difference between Plan B. So at 6 purchases the Plan's prices would even out, but Plan B would only become the better plan at 7 purchases. By the context of the question it is a bit hard to tell if you should answer 6, 7, and 8, or just 7 and 8, but it does say "better buy." I would go with answering 7 and 8 if I were you. Hoped this helped!

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Factor completely:<br>64 - y^3

madam [21]

From your equation, you can see that you have a difference of two cubes (aka two cubes being subtracted): 64, which is $4^{3}$ , and $y^{3}$ .

There is rule for the difference of two cubes:
The difference of two cubes is equal to the difference of the cube roots times a binomial, which is the sum of the squares of the roots plus the product of the roots.

That sounds pretty confusing, but it's much easier to understand when put mathematically. Let's say our two cubes are $a^{3}$ and $b^{3}$ . The difference of those two cubes is:
$a^{3} - b^{3} = (a - b)( a^{2} + ab + b^{2})$

In our problem, a = 4 (since $a^{3}$ = 64) and b = y (since $b^{3} = y^{3}$ . Plug these values into the rule to find the factor of $64 - y^3$ :
$64 - y^3 \\
= (4 - y)( 4^{2} + 4y + y^{2}) \\
= (4 - y)( 16 + 4y + y^{2})$

-----

Answer: $(4 - y)( 16 + 4y + y^{2})$

8 0

3 years ago

According to the empirical rule, 68% of 7-year-old children are between ___ inches and ___ inches tall.

AveGali [126]

Using the empirical rule 68% would fall within one standard deviation of the mean.

The standard deviation is given as 2 inches and the mean is 49 inches.

Since it is only one standard deviation find the lower number by subtracting the standard deviation from the mean and find the higher number by adding the standard deviation to the mean.

49 - 2 = 47

49 + 2 = 51

68% would be between 47 inches and 51 inches tall.

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3 years ago

Read 2 more answers

Fill in the table using this function rule. y = 5x=+1

icang [17]

Answer:

x = 1; y = 6

x = 5; y = 26

x = 8; y = 41

x = 10; y = 51

Step-by-step explanation:

Just substitute the x values

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2 years ago

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drek231 [11]

Answer:

Step-by-step explanation:

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2 years ago

The director of an animal shelter need to raise more than $50,000 during a fundraiser. Write an inequality that represents the a

mr_godi [17]

Answer:

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3 years ago