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
igomit [66]
3 years ago
13

X+7z=16 3x+y=8 y-7z=-12

Mathematics
1 answer:
svet-max [94.6K]3 years ago
8 0

x = 16 - 7z  \\ \ \\ \ 3(16 - 7z) = 8 \\ 48 - 21z = 8 \\  - 21z =  - 40 \\ z =  \frac{40}{21}  \\  \\  \\ y   - 7( \frac{40}{21} ) =  - 12 \\ y -  \frac{40}{3}  =  - 12 \\ y =  - 12 +  \frac{40}{ 3}  \\ y =  \frac{4}{3}
You might be interested in
Sonya wants to know how much her annual take-home pay will be after she pays FICA taxes totaling 7.65% on an annual salary of $3
cestrela7 [59]
36590*0.0765=2799.135
36590-2799.135=33790.865
Final answer: $33,790.87
3 0
4 years ago
-2/-2 simplified as a whole number
Katarina [22]

Answer:

1

Step-by-step explanation:

I'd prefer to write this expression as -2/(-2).  That quotient is 1.

5 0
3 years ago
F(x)=6x-18 sub in f(x/3), f(x)/3
arlik [135]

These are two separate problems: in the first we will have to substitute in a new value for x into the original equation and in the second we will manipulate the preexisting equation for f(x).

To begin, we will sub in f(x/3). To do this, we will substitute each variable x in the equation (in this case there is only one) with x/3, and then simplify the resulting equation.

f(x) = 6x - 18

f(x/3) = 6(x/3) - 18

To simplify, we should distribute the 6 on the right side of the equation.

f(x/3) = 6x/3 - 18

Now, we can divide the first term on the right side to finalize our simplification.

f(x/3) = 2x -18

Secondly, we are asked to find f(x)/3. To do this, we will take our original value for f(x), and then simplify divide that entire function by 3.

f(x) = 6x - 18

f(x)/3 = (6x-18)/3

This means that we must divide each term of the binomial by 3, so we are really computing

f(x)/3 = 6x/3 - 18/3

We can simplify by dividing both of the terms.

f(x)/3 = 2x - 6

Therefore, your answer is that f(x/3) = 2x - 18, but f(x)/3 = 2x - 6. It is important to recognize that these are two similar, yet different, answers.

Hope this helps!


8 0
3 years ago
Is 0.3 great than or less than 0.39
uranmaximum [27]

0.3 is less than 0.39 because 0.3 is equivalent to 0.30

3 0
4 years ago
Read 2 more answers
Drea and Sajini both worked at a local ice cream shop over the summer. Together, they earned a total of $425. Drea earned $25 mo
Oksi-84 [34.3K]

Answer:

Sajini = 200

Drea = 225

Step-by-step explanation:

d = amount Drea earned

s = amount Sajini earned

Together they earned 425

d+s =425

d = s+25


The system of equations

d+s =425

d = s+25


I will use substitution to solve

Substitute d= s+25 into the first equation

d+s =425

(s+25) + s = 425

Combine like terms

2s+25 =425

Subtract 25 from each side

2s+25-25 =425-25

2s = 400

Divide by 2

2s/2 =400/2

s =200

Sajini = 200

Now we need to find d

d = s+25

d = 200 + 25

d = 225

Drea = 225


7 0
3 years ago
Read 2 more answers
Other questions:
  • anne picks a 4-digit number the first number is not 0 the four digit number is a multiple of 5 how many different 4-digit number
    5·1 answer
  • Ally has one coupon for $5.00 off and another coupon for 25% off. The store only allows one coupon per purchase. If Ally's purch
    12·1 answer
  • 8 divided by 870. long division and b it's hard for me
    15·1 answer
  • It takes 3.5 minutes to upload 12 photographs from a smart phone to a computer and then an additional 1.25 minutes to upload the
    6·1 answer
  • 1 3/7 plus 1 5/7 is how much in all
    10·1 answer
  • Bacteria A has a growth rate of 0.68% per minute. Bacteria B has a growth rate of 0.012% per second. Determine which bacterium h
    9·2 answers
  • How much smaller is 63512 than 94291
    12·2 answers
  • Someone PLEASE help me !!
    6·2 answers
  • If the equations 100x+300=500 and x+3=5 give the same answer, how are they related?
    14·1 answer
  • Plzzzzzzzzzzzzz help meeeeeeeee
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!