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Alla [95]
2 years ago
6

What is -21 + 11 then 16 -23

Mathematics
2 answers:
Rom4ik [11]2 years ago
5 0

Answer:

- 21 + 11 \\  \\  =   - 10\\  \\ 16 - 23 \\  \\  =  - 7

vekshin12 years ago
4 0

Step-by-step explanation:

-21+11

= 10

16-23

= -7

it's was helpful to you

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30 Points! please help!
SVEN [57.7K]

Answer:

18) 4 * 10 ^ -10

19) t ^ 9

Step-by-step explanation:

18. When multiplying in scientific notation, just multiply the regular numbers together and add the exponents for the tens.

So it'll be 40 * 10^-11

However, the beginning number should have the decimal right after the 4, not any place after (for example, it's 3.056, not 30.56 or 3056.)

To fix this, move the decimal place forward one space from 40. to 4.0, and add 1 to the -11 power.

So the answer is now 4 * 10^-10

19. When dividing exponents, if the base number is the same, you can divide. (Basically, you can not divide x^2 and y^3 because x and y aren't the same)

Since in this case it's t, you can divide.

Dividing exponents is simple: just subtract them.

14 - 5 = 9

so the answer is t ^ 9

3 0
3 years ago
Based on a survey of U.S. residents completed in 2014, ___________ percent of respondents agreed that global warming is occurrin
Daniel [21]

Using the percentage concept, supposing 520 out of 1000 respondents believe in global warming, 52% of respondents agreed that global warming is occurring.

<h3>What is a percentage?</h3>

The percentage of an amount a over a total amount b is given by a multiplied by 100% and divided by b, that is:

P = \frac{a}{b} \times 100\%

In this problem, we suppose that 520 out of 1000 respondents believe in global warming, hence a = 520, b = 1000, and the percentage is of:

P = \frac{520}{1000} \times 100\% = 52\%

More can be learned about the percentage concept at brainly.com/question/10491646

3 0
1 year ago
Given that R = 4 x + 8 y Find y when x = 4 and R = 32
victus00 [196]

R = 4 x + 8y [ Given ]

when ,

x = 4 and R = 32

★ Substituting the values

=> 32 = 4 × 4 + 8y

=> 32 = 16 + 8y

=> 8y = 32 - 16

=> 8y = 16

=> y = 8/16

=> y = 2

7 0
3 years ago
Read 2 more answers
Please help me solve this angle problem. It is due today!
Paul [167]
Answer: B
No explanation
7 0
2 years ago
Im asking for you're help Citizen I have a question for you Me
Studentka2010 [4]

Answer:

No idea

Step-by-step explanation:

No idea for that either

8 0
2 years ago
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