Pls help! will give brainlist!

The equations below represent the total amount charged, Y, by two different plumbers as a function of the number of hours worked, X.

Plumber A: y = 20x + 60
Plumber B: y = 40x

The graphs of these functions cross at the point (3, 120). What does the point (3, 120) signify?

A. The point (3, 120) is the slope of the system of equations.

B. The point (3, 120) is the Y intercept of the system of equations.

C. The point (3, 120) is the solution for the system of equations.

D. The point (3, 120) is when the plumbers worked 120 hours.

C) The solution for the system of equations

Step-by-step explanation:

Point (3, 120) is where both lines intercept!

Basically, (3, 120) is where both equations are equal to each other.

(120 = 20(3) + 60) = (120 = 40(3))

We can test it!

120 = 20(3) + 60

120 = 60 + 60

120 (Correct)

120 = 40(3)

120 = 120 (Correct)

answer: the answer is 5/22

step-by-step explanation: if you subtract 17 from 22 the answer is 5 therefore the remainder of students are female

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places