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
DENIUS [597]
2 years ago
5

Solve each system of equations by substitution -4x+y=-5 and 2x+y=7

Mathematics
2 answers:
Nadya [2.5K]2 years ago
6 0

Answer:

(2,3)

Step-by-step explanation:

cestrela7 [59]2 years ago
6 0

Answer:

x = 2 and y = 3

Step-by-step explanation:

-4x + y = -5  -------------------(I)

         y = 4x  - 5 ------------(II)

2x + y = 7 -------------------(III)

Substitute y = 4x - 5 in equation (III)

2x + 4x - 5 = 7

   6x - 5 = 7

Add 5 to both sides

6x = 7 + 5

6x = 12

Divide both sides by 6

x = 12/6

x = 2

Plugin x =  2 in (II)

y = 4*2 - 5

y = 8 -5

y = 3

You might be interested in
A function has the rule y= -2x+11
Anon25 [30]
Input is 4 
so y=-2(4)+11
y=-8+11
y=11-8
y=3
Ans
(4,3)
4 0
3 years ago
Read 2 more answers
Alex has a grid in the shape of a rectangle. he has right triangles. each right triangle has an area of 25 square millimeters an
Maurinko [17]
First you have to find the area of the rectangular grid. The area of a rectangle is length•width.
So:
A= 20•12
A= 240cm
Then you need to convert 240cm into mm.
240cm is 2400mm.

Then you need to figure out how many triangles can fit into the rectangle if all the triangles have an area of 25mm. So you divide 2400 by 25.
2400:25= 96

So Alex can fit 96 triangles into the grid.
4 0
3 years ago
A club has 800 members. 100 of the members were randomly picked and were asked if the dues should be raised. 6 of the members sa
frez [133]

Answer:

About 48 members would be expected to say that dues be raised

Step-by-step explanation:

Here, we shall be using a case of a representative sampling to determine the actual.

Out of the 100 selected members, 6 said the dues should be raised;

This represents a percentage of 6/100 = 6%

So out of the 800, the expected number of members that would ask for a dues raising will be;

6/100 * 800 = 48

5 0
3 years ago
HELLLLLLLLLPPPPPPPPPPPPPPPP Please
morpeh [17]
The answer is 15.50 your welcome
8 0
3 years ago
(-2g + 7) - (g + 11)<br><br> please i need help
Lina20 [59]

Answer: -3g - 4

(-2g + 7) - (g + 11)

= -2g + 7 - g - 11

= -3g - 4

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Find the range for f(x) = x^2 1, for x &lt; 0.<br><br> y ≥ 1<br> y &gt; 1<br> y &lt; 1<br> y ≤ 1
    6·1 answer
  • A meeting takes place between a diplomat and fourteen government officials. however four of the officials are actually spies. if
    8·1 answer
  • Each day, Steve walked 1/12 mile more than the previous day. The first day he walked 1/12, the second day he walked 2/12 mile, t
    10·1 answer
  • PLEASE HELP?<br> I don’t know why but I’m so lost.
    9·1 answer
  • Maria uses 1 1/5 cups of milk for her cereal and
    12·2 answers
  • What is the slope of y = -1 + 3x?
    7·1 answer
  • 358 tickets to the school basketball game on Friday were sold.Students tickets were $1.50 and non-student tickets were $3.25. Th
    10·1 answer
  • a laptop's screen is 8 inches long. if the diagonal measures 10 inches, what is the width of the laptop
    15·1 answer
  • Given f(x) = -x +6, Evaluate f(x) for X= -1 and 3 and 5<br> Range:
    12·1 answer
  • How do I compare Elenas and Noah’s money using fractions?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!