One of the ways to solve a system of equation is by using the substitution method
The values of x and y are -9 and 5
<h3>How to use the
substitution method </h3>
The equations are given as:
2x + 6y = 12
x + y = -4
Make x the subject in the second equation
x = -4 - y
Substitute x = -4 - y in the first equation
2(-4 - y) + 6y = 12
Expand
-8 - 2y + 6y = 12
Add 8 to both sides
- 2y + 6y = 20
So, we have:
4y =20
Divide through by 4
y = 5
Recall that:
x = -4 - y
So, we have:
x = -4 - 5
x = -9
Hence, the values of x and y are -9 and 5
Read more about the substitution method at:
brainly.com/question/13476446
Answer:
30 cm^3
Step-by-step explanation:
for find the volume we have to multiply the three numbers:
V = 5 x 2 x 3 = 30 cm^3
Answer:
415 books, I dont understand the second question, sorry
Step-by-step explanation:
1 small box=20 books
1 big box=45 books
5 small boxes×20 books= 100 books
7 large boxes×45 books= 315 books
315 books+100 books=415 books
14.
Subtracting a negative number is like adding a positive number. So, you can change 9 - (-5) into 9 + 5, which is much simpler. Then, just add to get 14.
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Answer:
53 degrees
Step-by-step explanation:
m<J = m<Q
