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valentina_108 [34]
3 years ago
11

Find the product. (4m^2 – 5)(4m^2 + 5)

Mathematics
1 answer:
aliya0001 [1]3 years ago
3 0

Answer: 16m^4−25


Step-by-step explanation:

(4m^2−5)(4m^2+5)

=(4m^2+−5)(4m^2+5)

=(4m^2)(4m^2)+(4m^2)(5)+(−5)(4m^2)+(−5)(5)

=16m^4+20m^2−20m^2−25

=16m^4−25

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The points in the table lie on a line. Find the slope of the line.<br><br><br><br> slope:
777dan777 [17]

Answer:

Using the table, the slope is 1/2

4 0
2 years ago
Jade got a 90% on her math quiz. She had 36 questions correct. How many questions did Jade get wrong?
Brums [2.3K]

Answer:

4 questions

Step-by-step explanation:

90% is the same as multiplying a number by 0.9. Let's say the number of questions on the quiz is x. This means the amount she got right was 0.9x. We are given this is 36, so we can set them equal and simplify:

0.9x = 36

x = 40

She must have gotten 40 - 36, or 4 questions wrong.

7 0
2 years ago
A printing company charges $5.00 for the first 400 pages printed. For each page printed over 400, the customer is charged an add
Vadim26 [7]

Answer:

D

Step-by-step explanation:

Up to 400 pages, the cost is fixed at 5.00 dollars

After 400 pages the cost is 0.01 cents/page

  • It's not A. 400 is the number of pages. It is not a cost.
  • It's not B either. B means that no matter how many pages you print, it's going to cost 5 dollars + the number of pages times 1 cent.
  • C is not the answer. It is really just an answer put it. You pay 1 cent for each page between 400 and what you printed.
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5 0
3 years ago
2x-7/3-5x+4/5=-x-4/30
Strike441 [17]

Answer:

Exact form: -7/10

Decimal form: -0.7

Step-by-step explanation:

Isolate the variable by dividing each side by by factors that don't contain the variable.

5 0
2 years ago
Ruben put an empty cup underneath a leaking faucet. After 1 1/2 hours, Ruben had collected 1/4 cup of water. What is the rate, i
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Answer:

The rate is \frac{1}{6} cups per hour

Step-by-step explanation:

It took the faucet 1 1/2 hours, i.e 1.5 or 3/2 hours to fill 1/4 cup by leaking

We need to find the rate in terms of cups that can be filled by water in 1 hour.

Using unitary method:

If it takes \frac{3}{2} h for \frac{1}{4} cup;

then it will take 1 h for how many cups?

= \frac{1 \times \frac{1}{4} }{\frac{3}{2} }

= \frac{2}{4 \times 3}

= \frac{2}{12}

= \frac{1}{6} cups

Therefore, the rate is \frac{1}{6} cups per hour

5 0
3 years ago
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