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Pani-rosa [81]
3 years ago
6

-8(2r - 8)+ 6 = -3(r + 7)

Mathematics
1 answer:
nordsb [41]3 years ago
4 0

Answer:

r = 7

Step-by-step explanation:

Use the distributive property by multipling the -8 to the 2r and the -8, do the same thing on the other side with the -3.

Afterwards, combine like terms by adding 64 and 6.

Next, add 3r to the left side, I usually choose the number with the variable (the letter) that looks like it will be easier to subtract. This leaves only 21 on the right side.

Next subtract 70 from both sides

Divide -13 by both sides

You should get the answer of r=7

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I need help with this question.
Marina CMI [18]
The region describes a rectangle. F(x,y) is optimized at the intersecting points around the rectangle.
You can try plugging in (-3,-5) , (-3,4), (4,4) , (4,-5) and see which one gives you the largest value.

The max value of f(x,y) is at point (4,-5)
---> 4(4) - 7(-5) = 16 + 35 = 51
5 0
4 years ago
The sum of twice a number and three is 21. find the number
Alisiya [41]

Answer:

sum of twice a number and three is 21

2x + 3 = 21

x = 9

7 0
4 years ago
What is the slope-intercept form of a line that contains the point (-2,-11) with a slope=4?
den301095 [7]

Answer:

I believe its c.

Step-by-step explanation:

There using the equation mx+b=y. M is the slope(4), b is the y intercept (3).

8 0
3 years ago
Read 2 more answers
Which equation shows an example of the associative property of addition? (–7 + i) + 7i = –7 + (i + 7i) (–7 + i) + 7i = 7i + (–7i
Anna007 [38]
The correct answer is the first option, which is:

 (–7 + i) + 7i = –7 + (i + 7i)

 The explanation is shown below:

 1. By definition, in the associate property of addition you summ the number by grouping them with parenthesis, without matter where you use those parenthesis.

 2. Therefore, as you can see, you can obtain the result of the addition  by agruping the numbers <span>(–7 + i) + 7i or  –7 + (i + 7i)</span> .
4 0
3 years ago
Read 2 more answers
A game show contestant is offered the option of receiving a computer system worth $2300 or accepting a chance to win either a lu
enot [183]

Step 01:

Game show

Data:

$2300 computer system

$5400 luxury vacation

$8700 boat

Step 02:

Expected winnings

p (luxury vacation) = 0.20

p (boat) = 0.15

E\text{ (game show) = \$5400}\cdot0.20\text{ + \$8700}\cdot0.15

E (game show) = $1080 + $1305 = $2385

The answer is:

The expected winnings are $2385

6 0
1 year ago
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