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Charra [1.4K]
3 years ago
8

Which expression is equivalent to this polynomial expression?

Mathematics
1 answer:
Mandarinka [93]3 years ago
5 0
Answer:

(D) 8x^2y^2 - 15x^2y + xy^2 + 5y

Explanation:

Step one : open brackets
Step two: solve

#note
If there is a minus sign outside the bracket, all terms inside are multiplied by -1 when the bracket is opened.

Answered by GAUTHMATH
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How do you do question b?
notsponge [240]

Part (b)

We use the result of part (a) and plug in (x,y) = (0,0). This is directly from the initial condition y(0) = 0.

\arcsin(4y) = x^2 + C\\\\\arcsin(4*0) = (0)^2 + C\\\\\arcsin(0) = C\\\\0 = C\\\\C = 0\\\\

-----------------

This means,

\arcsin(4y) = x^2 + C\\\\\arcsin(4y) = x^2 + 0\\\\\arcsin(4y) = x^2\\\\4y = \sin(x^2)\\\\y = \frac{1}{4}\sin(x^2)\\\\

is the solution with the initial condition y(0) = 0.

6 0
3 years ago
During the summer, Breanna works at a coffee shop. She saves 75% of her earnings to buy new school clothes. If Breanna earns $75
Westkost [7]

Answer: The best estimate for the amount of money she saves to buy clothes = $ 562.5

Step-by-step explanation:

Given: Breanna saves 75% of her earnings to buy new school clothes.

Earnings for Breanna = $ 750

The amount of money she saves to buy clothes = 75% of 750

= 0.75 x  750   [75%= 0.75]

= $ 562.5

Hence, the best estimate for the amount of money she saves to buy clothes =  $ 562.5

5 0
3 years ago
Read this excerpt from A Black Hole is NOT a Hole.
diamong [38]

Answer:

I think the author is meaning to tell you to use your imagination to think about what will happen when you enter. You don’t know until you through it.

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
What is an appropriate scale to graph a credit of $35 and a debit of $40?Explain your reasoning
miss Akunina [59]
A bar graph since I'm only going up by fives it's easy to show as a bar graph
4 0
3 years ago
Pat has been assigned the job of picking apples from the family orchard. He could do the job alone in 8 hours. He knows that his
schepotkina [342]

Answer:

3.7 hours

Step-by-step explanation:

Pat could do the job alone in 8 hours.

Patti could do the job alone in 7 hours

Output = Rate * time

Let the rate at which pat does the work = Rp

Let the rate at which Patti does the work = Rt

Let X be the total output

Rp * 8 = X

Rp = X/8

Rt * 7 = X

Rt = X/7

If both pat and Patti pick apples, we have

(Rp+Rt)T = X

(X/8 + X/7)T = X

[(7X + 8X)/56]T = X

[X(7+8)/56]T = X

Divide both sides by X

[(7+8)/56]T = 1

(15/56)T = 1

T = 56/15

T = 3.7 hours

8 0
3 years ago
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