During his vacation, Dalyn rents a small boat from a rental service that charges a flat fee of $30 plus $10 per hour (including taxes). The total charge comes to $110. Which equation can be used to calculate the number of hours, X, that Dalyn rents the boat?
A 10x + 30 = 110; 8 hours
B 10(x + 30) = 110; 8 hours
C 30x + 10 = 110; 7 hours
D 30(x + 10) = 90; 7 hours

A. 10x + 30 = 110; 8 hours

Step-by-step explanation:

We get A as our answer because we know that there is an hourly fee of 10 so we can write that as 10x. Next we know we have an inital fee of 30. So in our equation we would just write it as 30. Finally we know what the total was. 110. So that would go into our equation as 110. So our final equation would be 10x + 30 = 110. Then when you solve it you get 8 for our missing number. In this cause 8 = x.

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct

i don't see any steps below, sweetheart