A joined figure with a half circle with a radius of 3ft and a triangle with a base of 6ft and a height of 7ft. The total area is a design for a mini golf corse and the turf is $1.50 per square ft

While it says they are joined, we will have to solve them as seperate shapes then add the area at the end.

Since we have a half circle and a triangle, the formulas for the areas are as follows

Half-Circle

it is the regular circle formula, but divided by 2, since it is half the size of a regular circle

(pi*r^2)/2

Triangle

it is the formula for the area of a triangle, being base times height divided by 2

(b*h)/2

Plug in the numbers into the appropriate variables, then add. you should get a total area of 49.274 ft^2. Then you just multiply the final area by the $1.50 to get the cost of the mini gold course.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.