3 years ago

Need help to solve Solving system of equation by Substitution method ( standard form)

1 answer:

7 0

Y- -7-23
3x-4y= 30

3x-4(-7x-23)=30
3x+28x+92=30 -4 multiplied by -7x and -23 is a positive outcome not negative
31x+92=30
31x=30-92
31x=-62
x= -62/31
x= 2

I think this is the answer, I am a little rusty in the substitution method

You might be interested in

What is the surface area of a sphere that has a radius of 5 units? Use 3.14 for π. A. 254 units2 B. 300 units2 C. 314 units2 D.

VladimirAG [237]

Answer:

C. 314 units2

Step-by-step explanation:

Sphere Formula:

SA=4πr²

SA= 4×3.14×5²= 314 units2

3 0

3 years ago

Read 2 more answers

Salma wants to buy a new house but needs money for the down payment. Her parents agree to lend her money at an annual rate of 4%

DochEvi [55]

Answer:

Total Interest at the end of two years will be $320. She will owe a total repayment amount of $4000 plus $320 for a total of $4320.

Step-by-step explanation:

Hope this helps.

8 0

3 years ago

Hey guys- need help here. Topic- exponents.

evablogger [386]

Your answer is m= -12

5 0

2 years ago

What is the equation, in point-slope form, of the line that is parallel to the given line and passes through the point (−3, 1)?

puteri [66]

Answer: The answer is (D) $y-1=\dfrac{3}{2}(x+3).$

Step-by-step explanation: We are given to find the equation of a line which is parallel to the line in the graph and passing through the point (-3, 1).

The points (-2, -4) and (2, 2) lie on the line in the graph, so its slope will be

$m=\dfrac{2+4}{2+2}=\dfrac{6}{4}=\dfrac{3}{2}.$

The slope of the line parallel to the line in the graph will also be same. Since the new line passes through the point (-3, 1), so the equation of the line will be

$y=1=m(x+3)\\\\\Rightarrow y-1=\dfrac{3}{2}(x+3),$

which is in the slope-intercept form.

Thus, the correct option is (D).

3 0

3 years ago

The function, f(x)=45/x models the volume of a gas in a balloon under xx units of pressure at a constant temperature. Which best

JulijaS [17]

My guess will be postive real numbers since pressure can not be negative or imaginary but can be a fraction or irrational

3 0

3 years ago