15 points!
m varies jointly as x and y, and m = 7 when x = 3 and y = 15 solve for m when x = 25 and y = 9. you may use k to represent the constant of variation in working if nesessary

m = 35

Step-by-step explanation:

∵ m ∝ xy

∴ m = kxy

∵ m = 7 when x = 3 and y = 15

∴ 7 = k (3) (15)

∴ 7 = 45k ⇒ ∴ k = 7/45

∴ m = 7/45 xy

∵ x = 25 and y = 9

∴ m = (7/45) (25)(9) = 35

1,150 give brainliest

step-by-step explanation

2r= 2300

r =1150

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

~