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
dlinn [17]
3 years ago
5

Solve this system of equations: 2x - y = 7 5x + y = 21

Mathematics
1 answer:
JulsSmile [24]3 years ago
7 0
7x= 28 so x is 4 and y is 1.. So (4,1)
You might be interested in
Suppose y varies directly with x. If y = 4 when x = -2, find x when y = 6.
daser333 [38]

Answer:

Step-by-step explanation:

3 0
3 years ago
A local deli sells 4-inch sub sandwiches for $2.95. It has decided to sell a “family sub” that is 50 inches long. How much shoul
lilavasa [31]
You take 50/4 which equals 12.5

so now you say “well one sub is 2.95”
take that and multiply it by 12

12 x 2.95 = 35.4

then you take 2.95 and divide it by 2 that is 1.48

so now you take 35.4 + 1.48

the cost should be 36.88
5 0
2 years ago
Hey can someone help me with #8? I need to find the rate of change and idk where to get started
AveGali [126]
I’m not 100% sure I’m correct on this but when she started at 12,584 miles, her tank was full. After driving, it was at 12,584 miles which is a difference of 208 miles. So if you put that into a fraction: it would be 31.12 dollars/208 miles, Which means every 31.12 dollars spent, she is able to drive 208 miles. Now all you need to do is simplify that. If you divide 31.12 by 208, you get around .149. That rounded would be about .15 gallons of gas. So every (and I don’t know if t tells you to round or not so be careful on that) .149 dollars, (not 149, it’s .149) she goes one mile.
5 0
3 years ago
2. LUIS WANTS TO BUY 2 PENCILS AND 1 NOTEBOOK IN THE STORE. EACH PENCIL COSTS $2 AND THE NOTEBOOK COSTS $6. HOW MUCH MONEY DID L
navik [9.2K]

Answer:

Luis spent $10 in total

2×2=4 6×1=6 6+4=10

Step-by-step explanation:

4 0
3 years ago
How to do zero-product property
SVEN [57.7K]
An number multiplied by zero is zero. This is because you are essentially saying that 1,000 0 times is zero.
6 0
3 years ago
Other questions:
  • Which is bigger 5 cups or 40 fluid ounces
    9·2 answers
  • How many solution does each graph have
    9·1 answer
  • 7. Which two equations are equivalent?
    14·1 answer
  • What is the slope of -3,5 and 1,2
    13·2 answers
  • The store offers a 20% discount. the discount price of a hat is 18$. what is the regular price?
    10·1 answer
  • PLEASE HELP ASAP I WILL GIVE BRAINLIEST TO FIRST CORRECT ANSWER
    14·2 answers
  • It has been observed that some persons who suffer acute heartburn, again suffer acute heartburn within one year of the first epi
    11·1 answer
  • In a bag there are red, orange and black counters.
    14·1 answer
  • Help with #7 please :) i’ll mark you brainily
    13·2 answers
  • Prove :.........<br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B%20%5Cfrac%7B1%20%2B%20cosx%7D%7B1%20-%20cosx%7D%20%7D%20%20%
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!