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serious [3.7K]
3 years ago
11

Solve for x. 8(x-1)=-4x+136

Mathematics
1 answer:
4vir4ik [10]3 years ago
3 0

Step-by-step explanation:

Given

8(x - 1) = - 4x + 136

8x - 8 = -4x + 136

8x + 4x = 136 + 8

12x = 144

x = 144 / 12

x = 12

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Stacey worked 12 hours and Amy worked 6 hours. They made the same amount of money per hour. If they made a total of $90 how much
IgorC [24]
Stacey { \to 12hours}

Amy { \to 6hours}

12 x 5 = 30

6 x 5 = 30

60 + 30 = 90

They made $5 an hour.
5 0
3 years ago
Use the laws of Sines and law of cosines to find missing dimensions​
Andrei [34K]

Answer:

A) ERROR

B) ∠C = 26°

Step-by-step explanation:

Houston, We have a problem!!! too much information

If we had a legit triangle, the law of sines would hold

19/sin138 = 8/sin20

  28.395 = 23.390

as this is NOT an equality, the triangle does not exist as described.

IF it did, we'd get different results depending on which set we used

∠F = 180 - 138 - 20 = 22°

Law of sines

19/sin138 = DE/sin22 ⇒ DE = 19sin22/sin138 = <u>10.63697...</u>

or

8/sin20 =  DE/sin22 ⇒ DE = 8sin22/sin20 = <u>8.762211...</u>

If we attempt to use Law of cosines

DE² = 19² + 8² - 2(19)(8)cos22 = <u>11.9639...</u>

so really none is correct because we attempt to use trig calculations to a non-triangle.

12) AC² = 15² + 19² - 2(15)(19)cos120

      AC = 29.51270...

29.51270 / sin120 = 15/sinC

C = arcsin(15sin120/29.51270) = 26.1142... <u>26°</u>

6 0
3 years ago
Read 2 more answers
Is y= -9/5x + 1/5 perpendicular to y= 5/9x + 2/9
Lunna [17]

The given lines are perpendicular

Step-by-step explanation:

if Two lines are perpendicular then their slopes are

mm_{1}=-\frac{1}{m_{2}}

Where m₁ is slope of first line and m₂ is the slope of second line.

Since the lines are in slope-point form the standard form is:

y=mx+b

where m is the slope

The slope of first line y= -9/5x + 1/5 is: m₁ = -9/5

The slope of second line y= 5/9x + 2/9 is: m₂= 5/9

So,  mm_{1}=-\frac{1}{m_{2}} i.e -\frac{9}{5}=\frac{5}{9}

So, The given lines are perpendicular

Keywords: Perpendicular lines, slope

Learn more about Perpendicular lines at:

  • brainly.com/question/6436086
  • brainly.com/question/12954015
  • brainly.com/question/1979240

#learnwithBrainly

3 0
3 years ago
I 100 points for this one because it is very personal.
konstantin123 [22]

Answer:

Hmmm, Well this is my personal opinion that you should figure this out yourself, this is a question only you can answer.

Step-by-step explanation:

P.S Can I have brainliest?

4 0
3 years ago
Read 2 more answers
Roman has 2 red pencils in his backpack. If this is 25% of the total number of pencils, how many pencils are in his backpack?
MrRa [10]
2 = 25%. 25% also means 1/4. So, it is a quarter of something. So. So find 100%, you have to multiply 2 by 4. 2 * 4 = 8. Roman has 8 pencils in his backpack.
6 0
3 years ago
Read 2 more answers
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