3 years ago

How do i solve systems by substitution

1 answer:

8 0

Answer: x = 2, y = 9

Step-by-step explanation:

y = 9x - 9 Substitute x for 2

y = 9(2) - 9 Multiply 9 with 2

y = 18 - 9 Subtract 18 - 9

Final Answer: y = 9 and x = 2

Mark me as brainliest!

You might be interested in

Solve.

BlackZzzverrR [31]

Ok first U start with 3

5 0

3 years ago

Convert –18° to radians.<br> Answer: D on edg (- pie/10 radians)

Natalija [7]

Answer:

$-\frac{\pi }{10}$ radians

Step-by-step explanation:

4 0

2 years ago

Seema used compatible numbers to estimate the product of (-25.31)(9.61). What was her estimate?

3241004551 [841]

If she used rounding she would’ve gotten -25×10 equals -250

3 0

3 years ago

Which is the inverse of the function f(x) = x2 − 4?

Rudiy27

The function is not one-to-one function, hence the inverse doesn't exist for the whole domain of the function. But if we restrict the domain to $x\in(-\infty,0]$ or $x\in[0,\infty)$ , then we can give the inverse.

$f(x)=x^2-4\\\\y=x^2-4\\\\x^2=y+4\\\\x=\sqrt{y+4} \vee x=-\sqrt{y+4}\\\\f^{-1}(x)=\sqrt{x+4}\vee f^{-1}(x)=-\sqrt{x+4}$

So, when $D_{f(x)}:x\in(-\infty,0]$ , the inverse is $f^{-1}(x)=-\sqrt{x+4}$ and when $D_{f(x)}:x\in[0,\infty)$ , the inverse is $f^{-1}(x)=\sqrt{x+4}$ .

7 0

3 years ago

Which equation represents the line on the graph?

Flura [38]

Answer:

Y=-1/3x+2

Reason:

the line is negative so it Goes down one right 3 and the line is on the positive 2 on the y axis.

7 0

3 years ago