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
Svetradugi [14.3K]
3 years ago
12

Solve the system of equations x + y = 4 and -9x + 7y = -84 by combining the equations.

Mathematics
1 answer:
Yanka [14]3 years ago
6 0

Answer:

x = 7

y = -3

Step-by-step explanation:

x + y = 4                 (Multiply this by 9)

-9x + 7y = -84

9x + 9y = 36

-9x + 7y = -84

16y = -48

y = -3

x + y = 4  

x - 3 = 4

x = 7

You might be interested in
EASY Work!! Please look at the picture and yes it’s easy for other people but not me for people asking.
Keith_Richards [23]

Answer:

7()=11

8()=42

I could barely see the answer for number 9 sorry :(

Step-by-step explanation:

the 7() is 2(3)+5

2(3)=6

6+5=11

Question (8)

c^2+3a x b

c(6)^2+ 3(3) x 2/3

36+9 x 2/3

36+6=42

7 0
3 years ago
Read 2 more answers
A gallon of water weighs 8.354 pounds Simon uses 11.81 gallons of water while taking a shower about how many pounds of water did
krek1111 [17]
Simon used about 98.66 pounds
8 0
3 years ago
Please HELP!! ILL GIVE BRAINLEST! QUCIK PLEASE HELP!!
Elena-2011 [213]

Answer:

d. linear; $25/hour

Step-by-step explanation:

From looking at the graph, we have that renting for 2 hours costs $50, for 4 hours costs $100, for 6 hours costs $150, and for 8 hours costs $200. To find out whether the quantities described in the table are linear, we have to see if there is a constant rate of change of price.

For hour 2 to hour 4, we can see that the price increases by $50. This is the same for hour 4 to hour 6 and hour 6 to hour 8. For every 2 hour time interval, the price increases by $50. Therefore, there is a constant rate of change and the quantities described in the table are linear.

Now we have to find the constant rate of change per hour. We know that the price increases by $50 every 2 hours, so, by dividing both the hours and price increase by 2, the price increases by $25 per hour. So the constant rate of change is $25/hour.

Linear. $25/hour

Answer choice d.

I hope you find my answer and explanation to be helpful. Happy studying.

6 0
3 years ago
CAN SOMEONE PLEASE HELP? THESE QUESTIONS ARE REALLY HARD AND I HAVE BEEN STUCK ON THEM FOR A WHILE. I REVIEWED THE LESSON AND EV
aniked [119]

Well if I did the right calculations... Kim is 24. The sister is age twelve! Hope I helped.

A. K+S=36

B. Well Simple Addition and Subtraction solves this easily. If you Add 12+12 it equals 24. It still needs to be larger so that Kim is twice as old as her little sister. So you Add another 12 which gives you 36. Or you can easily subtract 12 from it and that will also bring you to 24.

6 0
3 years ago
Read 2 more answers
Craig went bowling with $190 to spend. He rented shoes for $ 10.00, paid $20 for food, and paid $10.00 for each game bowled. How
Mazyrski [523]
Craig could play 16 games
4 0
2 years ago
Other questions:
  • What is 3+3/-4+6-34+9
    6·2 answers
  • The number of hours, t, that bacteria spread 10-fold can be modeled by the equation B(t) = B0(10)2t. There are 25 bacteria prese
    5·1 answer
  • A fair coin is tossed four times. What is the probability that the number of heads appearing on the first two tosses is equal to
    8·1 answer
  • Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 229 wi
    11·1 answer
  • If the function f(x) = -1/2x - 7 were graphed, which of the following would be true?
    13·1 answer
  • A bag contains blue, red, and green marbles. Paola draws a marble from the bag, records its color, and puts the marble back into
    6·1 answer
  • PLEASE HELP ME THIS IS DUE SOONNN. ILL MAKE IT A LOT OF POINTS AND IF U ANSWER BOTH CORRECTLY ILL GIVE YOU BRAINLIEST PLEASE
    7·1 answer
  • For which situation could flipping a coin be
    13·1 answer
  • A bus leaves Flacq at 07 05 and reaches Curepipe at 08 50, after travelling a distance of 91 kilometres. Find the average speed
    5·1 answer
  • A fair coin is tossed 3 consecutive times. What is the probability that the result of the first toss is heads and the results of
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!