PLEASE HELP WILL MARK BRAINLIEST!! John is at the beach and he wants to rent a jet ski and beach chairs for the day. The following functions represent the cost for each, where J(x) represents the cost of the jetski and B(x) represents the cost of the beach chairs.

J(x) = 30x + 7
B(x) = 5x + 3

Which of the following functions could represent his total cost, C(x), for the rentals at the beach?

A: C(x) = 35x + 10
B: C(x) = 25x + 4
C: C(x) = 35x + 4
D: C(x) = 25x + 10

Aladder that is 20ft long is leaning against the side of a building. if the angle formed between the ladder and the ground is 75 degrees how far is the bottom of the from the base of the building?

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. kevin spins the spinner 180 times. kevin determines about how many times the spinner will land on red or green, and his work is shown below. -kevin has the formula reversed; it should be the total number of sections over the number of red or green sections. -kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections. -kevin should multiply by the number of sections in the spinner rather than the total number of spins. -kevin calculated the prediction correctly and did not make any mistakes.

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?