3 years ago

When solving the system x + 2y = 9 and x - y = 6 by substitution, what can be substituted for x in the second equation?

1 answer:

8 0

X+2y = 9 ---------eq.1
x-y =6 ----------- eq.2

x = 9 -2y (from eq. 1)

Now substitute the value of x in the second eq.2

9-2y-y =6
-3y = -3
y =1

So,
x +2 (1)= 9
x= 7

You might be interested in

1a simplify 6x × 3y

lesantik [10]

18xy
You need to do 6*3=18
Then x*y= xy

6 0

2 years ago

Brand A has a recognition value worth 43 billion more than brand B if the total value of these two brands is 111billion find the

saveliy_v [14]

Answer:

68 and 43 are the answer

6 0

3 years ago

For what value of the variable will the expression 8b-27 <br><br> -11

raketka [301]

Answer: 8b - 38

Step-by-step explanation:

8 0

2 years ago

Every 125 pages that Raul reads during his summer reading challenge, he will collect 5 book points to use at his local library.

monitta

Answer:

The answer is " $\frac{1}{25}$ "

Step-by-step explanation:

They might claim that perhaps the ratio to Raul would've been: $\frac{y}{x} = \frac{5}{125} = \frac{1}{25}$ per each 125(x) page, which he reviewed throughout a summer competition.

Raul's cost per unit for each paragraph reads is $\frac{1}{25}$ page points, that's why the model a link with the same unit rate. please find the graph in the attached file.

8 0

2 years ago

That’s all i need to know. Thanks!

Svet_ta [14]

Answer:

c = 5

Step-by-step explanation:

a^2 + b^2 = c^2

3^2 + 4^2 = c^2

9 + 16 = 25

c^2 = 25

sqrt of 25 = 5

c= 5

6 0

3 years ago

Read 2 more answers