MATHEMATICS HIGH SCHOOL

Which expression is equivalent to (–3y – x) – (5y – 8x)?–8y – 8x
–8y + 7x
2y – 7x
8y + 8x

Answers

Answer 1
Answer: If you would like to find the equivalent expression to (-3y - x) - (5y - 8x), you can do this using the following steps:

(-3y - x) - (5y - 8x) = -3y - x - 5y + 8x = -8y + 7x

The correct result would be -8y + 7x.
Answer 2
Answer:

Answer:

-8y + 7x.

Step-by-step explanation:

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A firecracker shoots up from a hill 140 feet high, with an initial speed of 100 feet per second. Using the formula H(t) = −16t2 + vt + s, approximately how long will it take the firecracker to hit the ground?A: Five seconds B: Seven seconds C: Nine seconds D: 11 seconds

Justin and his friend dan went to the movies. if they each bought popcorn for $4.25 and a soda for $2.25, what was their total bill after adding 5% sales tax?

Answers

Answer:

the answer is 32.50

Step-by-step explanation:

I added the two totals and then multiplyed them by 5

Answer:

6.55

Step-by-step explanation:

What is the correct answer to number 9? Please explain step by step.

Answers

Answer:

The answer to your question is   Momentum  = ((x + 2)^(2))/(x - 3)

Step-by-step explanation:

Data

mass = (x^(2)+ 4x + 4 )/(x^(2)- 9)

velocity = (x^(2)+ 5x + 6)/(x + 2)

Formula

Momentum = mass x velocity

Substitution

    Momentum = (x^(2)+ 4x + 4)/(x^(2)- 9) (x^(2) + 5x + 6)/(x + 2)

Factor    The first numerator is a perfect square trinomial and the second one is a trinomial of the form x² + bx + c.

    Momentum = ((x + 2)^(2))/((x - 3)(x + 3)) ((x + 2)(x + 3))/(x + 2)

Simplify and result

   Momentum  = ((x + 2)^(2))/(x - 3) or (x^(2) + 4x + 4)/(x - 3)

Find the value of x in the following parallelogram

Answers

Answer:

2x+4=6x-16 (opposite sides of parellogram are equal)

16+4=6x-2x

20=4x

20/4=x

x=5

Answer:

5

Step-by-step explanation:

2x + 4 = 6x - 16 (opposite sides of a parallelogram are equal)

2x - 6x = -16 - 4

-4x = -20

x = -20/-4

x = 5

hope you understood :)

Need help with this problem

Answers

All angles of a triangle have to equal 180 degrees. The top and bottom triangle are the same. So the first angle tells you 32 degrees. The second one has a little square which means 90 degrees. So 180 - 32 - 90 = 58.
So the angle A is 58. Since the top triangle and bottom triangle have the same angle measurement then angle C = 58 degrees.

If you get $28 for washing 07 cars. How many dollars do you get for washing two cars?

Answers

Answer: 8 dollars

Step-by-step explanation:

its mental math for me cant give one

Four books, one each on physics, chemistry, mathematics, and biology are about to be stacked on a shelf. If the books are stacked randomly, what is the probability the mathematics book is on top?

Answers

There are 4 books.
The math book can either be top, second from top, third from top, or on the bottom.
The probability of being in any single given position is 1/4 = 25% .
Since each book can be put on the top, and there are 4 books, the chances of a math book going on the top is 1/4, while the other 3 chances are the other books. So your answer is 1/4 or 0.25
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