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Tema [17]
4 years ago
10

How do I use substitution to solve a system of linear equations?

Mathematics
1 answer:
ELEN [110]4 years ago
7 0

Answer:

for example:

y=2x+4

 3x+y=9

We can substitute y in the second equation with the first equation since y = 2x+4.

  3x+(2x+4)=9

5x+4=9

5x=5

x=1

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Algebra 1 plz help me
sasho [114]

Answer:

Step-by-step explanation:

solution is (4,3)

OR

x=4

y=3

this point lies in both the tables.

we have to find a pair which lies on both.

8 0
3 years ago
Lesson 4-1 Solving Systems of Equations by Graphing
bagirrra123 [75]

Answer:

Where's the question?

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
PLEASE HELPPPXPDPD. If -5c+6=-69, what is the value of 6c-15?
crimeas [40]

Answer: 75

Step-by-step explanation:

To find the value of 6c-15, we first want to finc the value of c. Once we find c, we can plug it in and solve.

-5c+6=-69            [subtract both sides by 6]

-5c=-75                  [divide both sides by -5]

c=15

Now that we have the value of c, we can plug it in and solve.

6(15)-15                 [multiply]

90-15                     [subtract]

75

The value is 75.

4 0
3 years ago
a student gets 11 out of 16 problems correct on a homework assignment. what percent of the assignment did the student get corret
Greeley [361]

Answer:

68.75 Percent

Step-by-step explanation:

11/16 =0.6875

0.6875 into percent is 68.75

7 0
3 years ago
-1/2x = -7 please answer I need help
Sloan [31]

Answer:

x = 14

Step-by-step explanation:

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Multiply -2 to both sides of the equation:

-2 * (-1/2x) = -2 * -7

x = -2 * -7

x = 14

Note that when you multiply two negative numbers, the answer will be positive.

14 is your answer for x.

~

3 0
3 years ago
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