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
bija089 [108]
3 years ago
7

Solve by substitution -4x+y=6 -5x-y=21

Mathematics
1 answer:
inn [45]3 years ago
7 0

Answer:

x=-3, y=-6. (-3, -6).

Step-by-step explanation:

-4x+y=6

-5x-y=21

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

-9x=27

x=27/-9

x=-3

-5(-3)-y=21

15-y=21

y=15-21

y=-6

You might be interested in
Lena paid $18.96 for 3pounds of coffee. What is the cost per pound for this coffee
STatiana [176]

Answer:

6.32

Step-by-step explanation:

divide 18.96 by 3  and the outcome is 6.32

6 0
3 years ago
HELP MEEE PLS recipe cslls for 2 cups of suger and makes 48 cookies recipe B calls for 3 cups of suger and makes 54 of the same
JulijaS [17]

Answer:

So, when we solve for x we see that we can make 16 cookies using 1 cup of sugar. Then, yes, as you suggested we could divide 30 cookies by this ratio to see that we need less than 2 cups of sugar to make 30 cookies: And, as you said, this value is less than 2 cups, the value under Quantity B. Good job! I hope this helps :)

Step-by-step explanation:

5 0
2 years ago
The cost in dollars of making x items is given by the function C(x) = 10x + 500. a. The fixed cost is determined when zero items
Brilliant_brown [7]

Answer:

a. $500

b. $250

Step-by-step explanation:

a. For zero items produced, cost will be-

C(0) = 10(0) + 500 = 0 + 500 = 500

b. For zero items produced, cost will be-

C(25) = 10(25) + 500 = 250 + 500 = 750

c. If C(x)_{max} = 1500

10x + 500 = 1500\\10x = 1000\\x = 100

∴ domain for cost function will be [0,100] and range will be 100

7 0
3 years ago
PLEASEEE HELP ITS FOR A GOOD CAUSE !!
Andrews [41]

Answer:

And what cuase might that be...? Jkjk ofc ill help

Step-by-step explanation:

Amswer is C. im 99 percent sure i did the math and to double check i put it into a site ans it said it was C! Hope this helps! :)

7 0
3 years ago
0.26 is bigger, the same, smaller than 206 thousandths?
mezya [45]

Answer:

I believe the answer is bigger than.

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • The length of a rectangle is 8 1/2 inches and the width is 3 1/4 inches. What is the ratio, using whole numbers, of the length t
    14·1 answer
  • Please fill out the function table.<br>Questions are in the photo.
    6·2 answers
  • I wanted to walk one mile each day in the morning I walked 4/10 if a mile and in the evening I walked 2/5 of a mile what was the
    7·2 answers
  • How do you find the normal approximation without using the continuity correction?
    5·1 answer
  • All real numbers that are less than -2
    14·1 answer
  • a bus is leaving the bus station at 5:45 p.m. and it takes 2 days 6 hours 30 minutes to reach a destination if the bus leaves on
    7·1 answer
  • Help!! please answer this easy math &lt;3 :)
    10·2 answers
  • Which of the following tables represents a function?
    12·2 answers
  • Solve each of the following quadratic equations<br><br> 3x=0.5x^2<br><br><br> 0=5x^2-2x+6
    10·1 answer
  • The population of a town in 2007 is 113, 505
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!