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3 years ago

10

Marla did 65 sit ups each day for one week used to the distributive propertyto show an expression you can use to find the total

number of sit ups Marla did during the week

1 answer:

Oxana [17]3 years ago

8 0

You could use the following 65 (7)

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Which equation is y = 2x2 – 8x + 9 rewritten in vertex form?

pishuonlain [190]

we have

$y=2x^{2} -8x+9$

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$y-9=2x^{2} -8x$

Factor the leading coefficient

$y-9=2(x^{2} -4x)$

Complete the square. Remember to balance the equation by adding the same constants to each side

$y-9+8=2(x^{2} -4x+4)$

$y-1=2(x^{2} -4x+4)$

Rewrite as perfect squares

$y-1=2(x-2)^{2}$

$y=2(x-2)^{2} +1$ -----> equation in vertex form

therefore

the answer is the option C

$y=2(x-2)^{2} +1$

3 0

3 years ago

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At the market, potatoes cost $1.15 per pound. Imagine you bought $3.45 worth of potatoes. How many pounds of potatoes did you bu

dusya [7]

You bought 3 potatoes

3.45/1.15
= 3

To check:
3.45/3
=1.15

Hope this helps!! :))

3 0

2 years ago

PLEASE HELP ME!!

Dmitry_Shevchenko [17]

It’s 18. 1/2 b*h b=4 h=9

8 0

3 years ago

Which polynomial is factored completely

Ket [755]

Answer: The correct option is c.

Explanation:

Reason for correct option:

$3x(9x^2+1)$

This expression cannot be factored further because $(9x^2+1)$ is the complete factor. Therefore the option c is correct.

Reason for incorrect option:

$5x^2-17x+14=5x^2-10x-7x+14=5x(x-2)-7(x-2)=(x-2)(5x-7)$

Since the given expression can be factored further therefore the option d is incorrect.

$4(4x^4-1)=4((2x)^2-1)=4(2x^2-1)(2x^2+1)$

Since the given expression can be factored further. Therefore the option a is incorrect.

$2x(y^3-4y^2+5y)=2xy(y^2-4y+5)$

Since the given expression can be factored further. Therefore the option b is incorrect.

4 0

4 years ago

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If you go out to eat, a good tip is $18 when the bill costs $100. What is this percent?

dlinn [17]

Answer:

This is a good tip and $18 is 18% of what the meal cost.

Step-by-step explanation:

On average the proper tip is 15% of the cost of your meal cost. In this case you have paid 18% of your meal cost.

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3 years ago

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