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Lelechka [254]
3 years ago
5

How can I learn to do standard notation and scientific notation?

Mathematics
1 answer:
jonny [76]3 years ago
5 0
Just watch videos on youtube.
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What is an efficient way to compute 47^2–37^2 without using raw calculations?
e-lub [12.9K]

Answer:

(47+37)(47-37)

Step-by-step explanation:

47^2-37^2 is a difference of two squares. a^2-b^2 = (a+b)(a-b) so this expression can be factored to (47+37)(47-37) = (84)(10) = 840

6 0
3 years ago
Which could be the resulting equation when elimination is used to solve the given system of equations?
mash [69]

Answer:

10b=60

Step-by-step explanation:

just took on edge, might be late but i can help people in the future.

7 0
3 years ago
Determine the value of x for which a || b if m<30=80-x and m<7=90-2x.
abruzzese [7]
D. 10

m<3 = 80 - (10) = 70
m<7 = 90 - (20) = 70
8 0
3 years ago
Please help! I put a screenshot :) I would like<br> a detailed answer please :) 55 points :)
seropon [69]

Method A: If we count, we see that the answer is 31.

Method B: 19 - -12 = 31. We can even do -12 - 19 and we'll get the same answer: -31, and the absolute value of -31 is 31.

Both methods will give you the same answer.

6 0
3 years ago
Read 2 more answers
Here are the first four terms of a sequence.
Nataly_w [17]

Answer:

  • aₙ = 2n² + n + 1

Step-by-step explanation:

We observe that the difference of terms is 4, 7 and 15 and next level difference is 4. It means the sequence is quadratic.

<u>We can compare this with simple quadratic sequence </u>

  • 1, 4, 9, 16

<u>and find out that doubling each term gives us </u>

  • 2, 8, 18, 32

This is close to our sequence, write the terms as follows to find exact rule

<u>The first term: </u>

  • a₁ = 4  = 2*1² + 2 = 2*1² + 1 + 1

<u>The second term</u>

  • a₂ = 11  = 2*2² + 3 = 2*2² + 2 + 1

<u>The third term:</u>

  • a₃ = 22 = 2*3² + 4 = 2*3² + 3 + 1

<u>The fourth term:</u>

  • a₄ = 37 = 2*4² + 5 = 2*4² + 4 + 1

<u>The nth term as per observation above is:</u>

  • aₙ = 2n² + n + 1
8 0
3 years ago
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