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-Dominant- [34]
3 years ago
15

4r + 9r- 11r +7rSimfly the expressions by combing like terms??

Mathematics
2 answers:
MissTica3 years ago
7 0
Solve this one in exactly the same way as I solved the one
that you posted 1 minute before this one.

--  add up all the ' r 's .

--  add up all of the just-plain-numbers

This time, the answer looks like  9r .

You should spend a few minutes with it so that
you know where this answer comes from.  
Alex787 [66]3 years ago
6 0
9r because 4+9 is 13+7 is 20-11 is 9
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One positive integer is 1 less than twice another. The sum of their squares is 106. Find the integers.
neonofarm [45]
They give us 2 pieces to the puzzle.  Both are positive numbers...x and y.
1.) 1 number is 1 less than twice another number. (x = 2y -1)...and
2.) the sum of their squares is 106.  (x^2 + y^2 = 106).

 substitute the value for x into the second equation.

(2y-1)^2 + y^2 = 106
(2y-1) (2y-1) + y^2 = 106  (use distributive property)
4y^2 - 2y - 2y + 1 + y^2 = 106  (subtract 106 from both sides)
4y^2 - 2y - 2y + 1 + y^2 - 106 = 106 - 106 (combine like terms)
5y^2 - 4y - 105 = 0  (factor)
(y-5) (5y-21) = 0  (set to 0)
y - 5 = 0
y = 5 

substitute the 5 into the equation for y   (x = 2(5) - 1)
           x = 9   if we square 9, we get 81.
subtracted from 106 we have 25...the square root of 25 is 5.

our answers are 5 and 9.
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3 years ago
Select Repeating or Nonrepeating to correctly classify each decimal.
astraxan [27]

Answer:

They all reapeating exept C

Step-by-step explanation:

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2 years ago
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<span>What is 80.68 +79.56 equal?
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3 years ago
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Really need helpllllll!!!!!
kirza4 [7]

Answer:

The relationship of the number of months and the total amount paid is proportional for both Hanks and Lynn.

Step-by-step explanation:

Let us divide the equation into 2 parts.

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Let

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The relationship between amount paid and the number of months is proportional

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She did not paid anything upfront but she paid $275 every month. Therefore,

x = number of month

y = total amount paid

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This relationship between amount paid and number of month is directly proportional

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Of the 1,640 students enrolled at a school, 50% come to school by bus, 35% come by car, and the rest of the students walk to sch
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