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Igoryamba
3 years ago
6

Pls Help! Brainliest if you can get it right!

Mathematics
1 answer:
Troyanec [42]3 years ago
8 0

Step-by-step explanation:

90-2x + 3x + 60 = 180

90 + x + 60 = 180

x + 150 = 180

x = 30°

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A CD usually sells for $12.00. If the CD is 20% off, and sales tax is 7%, what is the total price of the CD, including tax?
vredina [299]
$12 x .20 = $2.40 

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3 0
4 years ago
Solve the Equations
kkurt [141]

Answer and Step-by-step explanation:

1) - 6.5 r = - 58.5

- r = - 58.5/6.5

- r = - 9

<h2>r = 9 </h2>

2) c - 5.5 = 2.3

c = 2.3 + 5.5

<h2>c = 7.8</h2>

3) 56 = - 5.6s

56/5.6 = - s

10 = - s

- 10 = s

<h2>s = - 10</h2>

4) d/4 = 4.7

d = 4.7 / 1/4

d = 4.7 * 4

<h2>d = 18.8</h2>

5) - 9 = 6.9 + x

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- 15.9 = x

<h2>x = - 15.9</h2>

6) 23.5 = 4.7z

23.5/4.7 = z

5 = z

<h2>z = 5</h2>

7) - 2.7 = v + 4.9

- 2.7 - 4.9 = v

- 7.6 = v

<h2>v = - 7.6</h2>

8) 2.6 = k/3

k/3 = 2.6

k = 2.6 / 1/3

k = 2.6 * 3

<h2>k = 7.8</h2>

9) - 5.6f = 44.8

- f = 44.8/5.6

- f = 8

<h2>f = - 8</h2><h2 />

hope it helps, my friend

3 0
3 years ago
Imagine you are trying to maximize the calories you burn in a 60-minute workout you do a few times a week. Running burns 9 calor
amm1812
Running burns the most calories folwed by aerobic

so max out the most and min the least


most running
running has no limit, so see least

aerobic, aerobic has to be at most 30 (less than 30)

rowing has to be at least 15 mins
say row=15 mins

then you have 45 mins left
max out on running (minus 1 tho to do running)

so
44mins running 1 min run, 15min row
total calories=507 calories burned

the way to do it is
x=running minutes
y=aerobic minutes
z=rowing minutes

x+y+z=60
9x+6y+7z=max calories
x≥5
y≤30
z≥15
those are the equations
not sure what the objective function is
8 0
3 years ago
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