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Art [367]
3 years ago
8

3. Find the values of the constants in each of the following:

Mathematics
1 answer:
lina2011 [118]3 years ago
7 0

9514 1404 393

Answer:

  a = 8; b = -9

Step-by-step explanation:

Filling in the given values gives you two equations.

  7 = a(2) +b

  -1 = a(1) +b

Subtracting the second equation from the first gives ...

  (7) -(-1) = (2a +b) -(a +b)

  8 = a . . . . . simplify

Using this value in the first equation gives ...

  7 = (8)(2) +b

  b = 7 -16 = -9

The constants are a = 8, b = -9.

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Choose the answer that makes the sentence true. (Blank) real numbers are integers. A. All B. Some C. No
zvonat [6]

Answer:

Some real numbers are integer

Step-by-step explanation:

Real numbers ;

  1. Natural numbers (counting numbers) = Integer
  2. Whole numbers = Integers
  3. Integers =Integers
  4. Rational numbers (fractions , repeating or terminating decimals) = Fraction and decimal are not integers
  5. Irrational numbers. = Not integer
4 0
3 years ago
Read 2 more answers
Solve for the unknown.​
natka813 [3]
Divide 4/2 so you get 2= n over 4 then multiply 2 by 4 and then multiply n over 4 by 4 you’ll get 4*2=n, multiply 4 and 2.

n=8
5 0
3 years ago
When babies are born, their lengths are recorded. Maddy is 18 1/2 inches. Her twin Alex, is 20 3/4 inches. How much longer is Ma
Furkat [3]

Answer:

Alex is 2 1/4 inches longer than Maddy

Step-by-step explanation:

Alex is longer than Maddy

20 3/4 - 18 1/2

Get a common denominator

20 3/4 - 18  2/4

2 1/4

Alex is 2 1/4 inches longer than Maddy

Maddy is -2 1/4 inches longer than Alex

7 0
3 years ago
Read 2 more answers
If KL = LM and KJ = JM, find m ∠KJL<br><br> please, i really need your help!
umka2103 [35]
The triangles are congruent by SAS, so the two angles with 7x and 3x+16 are equal. So

7x=3x+16
4x=16
x=4

So KJL=7(4)=28.
3 0
3 years ago
Choice 3: Kyra makes $700.00 a week in her job. She did such a great job this week that she is going to get a 15% raise next wee
nikklg [1K]

Answer:

15/100 x 700 = 105

Step-by-step explanation:

Consider 15% as 15 because you always consider a percent out of 100, you can remember by the word 'cent' meaning 100.

You need to FIRST find out what the percentage is OF whenever coming across these types of problems.

And the keyword 'of' means to multiply.

5 0
2 years ago
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