All categories

3 years ago

Solve the system by substitution. y = 3x y = -4x – 49

Mathematics

1 answer:

Alex787 [66]3 years ago

6 0

Answer:

Step-by-step explanation:

Substitute 3x into y=-4x-49

y=−4x−49

3x=−4x−49

3x+4x=−4x−49+4x(Add 4x to both sides)

7x/7=−49/7

(Divide both sides by 7)

x=−7

Step: Substitute−7forxiny=3x:

y=3x

y=(3)(−7)

y=−21(Simplify both sides of the equation)

Answer:

x=−7 and y=−21

You might be interested in

Given that f(x)=3x+1 and g(x)=4x+2/4, solve for g(f(0))

maksim [4K]

$f(x)=3x+1\\\\g(x)=\dfrac{4x+2}{4}\\\\f(0)=3\cdot0+1=0+1=1\\\\g(f(0))=g(1)=\dfrac{4\cdot1+2}{4}=\dfrac{4+2}{4}=\dfrac{6}{4}=\dfrac{6:2}{4:2}=\dfrac{3}{2}=1.5$

7 0

3 years ago

Graph the following inequality and then select the correct graph below. x - y - 2 ≥ 0

-Dominant- [34]

Answer:

the graph in the attached figure

Step-by-step explanation:

we have

$x-y-2\geq 0$

Isolate the variable y

$-y\geq -x+2$ -----> Multiply by $-1$

$y\leq x-2$

The solution of the inequality is the shaded area below the solid line

The equation of the line is $y= x-2$

The slope of the line is positive

The y-intercept of the line is the point $(0,-2)$

The x-intercept of the line is the point $(2,0)$

Using a graphing tool

the graph in the attached figure

7 0

3 years ago

Read 2 more answers

What fraction is halfway between 9/10 and 10/10. Question 8

Bumek [7]

$\frac{-9.5}{10}$ is halfway between $\frac{-9}{10}$ and $\frac{10}{10}$ .

hope that helps :)

5 0

3 years ago

Is the following table proportional or non-proportional?

Helga [31]

Answer: Proportional

Step-by-step explanation: 8 goes into 36, 2 goes into 24, and 5 goes into 10

8 0

3 years ago

Choose the algebraic expression that best matches this verbal description: "the sum of 3 and 7 times a number x

aniked [119]

Answer:

Step-by-step explanation:

the sum of 3 and 7 is 3+7. then times x

8 0

3 years ago