1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
olga nikolaevna [1]
2 years ago
12

Solve the system of equations -x+ 2y = –11 and 5x – 8y = 39 by combining the equations.

Mathematics
1 answer:
Alchen [17]2 years ago
3 0

Answer:

x=-5, y=-8. (-5, -8).

Step-by-step explanation:

-x+2y=-11

5x-8y=39

---------------

5(-x+2y)=5(-11)

5x-8y=39

---------------------

-5x+10y=-55

5x-8y=39

--------------------

2y=-16

y=-16/2

y=-8

-x+2(-8)=-11

-x-16=-11

-x=-11+16

-x=5

x=-5

You might be interested in
Bruce has a 16 ounces bottle of water that is 1/2 full. He drinks 1/5 of the water left in the bottle. How many ounces of water
Natali5045456 [20]

Answer: 1.6 Ounces.

16/2 is 8.

8/5 is 1.6

You can check this by multiplying 1.6 times 5 then by 2,

8 0
2 years ago
Which of the following is a factor of x4−8x2+16?
ad-work [718]
16 is correct I hope this helps :)))))))))))))
6 0
3 years ago
If z = -1.3, mu=80, sigma=30 What is the actual data value? Round to 2 decimal places.
Andre45 [30]

Step-by-step explanation: This simple confidence interval calculator uses a Z statistic and sample mean (M) to generate an interval estimate of a population mean (μ).

Note: You should only use this calculator if (a) your sample size is 30 or greater; and/or (b) you know the population standard deviation (σ), and use this instead of your sample's standard deviation (an unusual situation). If your data does not meet these requirements, consider using the t statistic to generate a confidence interval.

where:

M = sample mean

Z = Z statistic determined by confidence level

sM = standard error = √(s2/n)

As you can see, to perform this calculation you need to know your sample mean, the number of items in your sample, and your sample's standard deviation (or population's standard deviation if your sample size is smaller than 30). (If you need to calculate mean and standard deviation from a set of raw scores, you can do so using our descriptive statistics tools.)

6 0
2 years ago
(x/6)-10=2<br> please help me find x
Ymorist [56]

Answer:

x = 72

Step-by-step explanation:

( \frac{x}{6})  - 10 = 2 \\ ( \frac{x}{6} ) = 2 + 10 \\  \frac{x}{6}  = 12 \\ x = 12 \times 6 \\ x = 72

8 0
1 year ago
3+3+3+3+3 what is the product?
lukranit [14]
The correct answer is 15
7 0
3 years ago
Read 2 more answers
Other questions:
  • My mum was 27 when I was born. 8 years ago she was twice as old as I shall be in 5 years time. How old am I now?
    9·1 answer
  • Please help and show work!!! Find the line perpendicular to y=-1/4x+7 and goes through the point (1,1).
    13·1 answer
  • .
    9·1 answer
  • To find the quotient Two-fifths divided by one-fourth,
    8·2 answers
  • Factor completely. a2 + 28 a + 27
    10·1 answer
  • A vase in the shape of an oblique cylinder has the dimensions shown. What is the volume of the vase?
    14·2 answers
  • Solve the quadratic y = −x^2 + 4x + 1 with steps plz!
    13·1 answer
  • 1/2+3/8=<br> .............………
    13·2 answers
  • What is 3 inches converted to feet?
    6·2 answers
  • the equation y=5,280x gives the number of feet,y,in x miles.what does the number 5,280 represent in this relation ship
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!