Question Help A contractor bought 7.6 112 of sheet metal. She has used 3.7 ft2 so far and has $78 worth of sheet metal remaining. The equation 7.6x - 3.7x = 78 represents how
much sheet metal is remaining and the cost of the remaining amount. How much does sheet metal cost per square foot?
Sheet metal costs $ per square foot.

d. it is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

step-by-step explanation:

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

final total: 63

step-by-step explanation:

60 times sales tax

60 times 0.05

3

60 + 3

63