WILL MARK BRAINLEST IF CORRECT HELP ME OUT

x = 12

Step-by-step explanation:

Equation:    0.52(x) + 0.72(4) = 0.57(x + 4)

0.52(x) + 0.72(4) = 0.57(x + 4)                     Multiply

0.52x + 2.88 = 0.57x + 2.28                       Subtract 0.52x from both sides

2.88 = 0.05x + 2.28                                     Subtract 2.28 from both sides

0.6 = 0.05x                                                  Divide all sides by 0.05

x = 12

-Chetan K

you would use (d.) the law of cosines or a^2 = b^2 + c^2 – 2bc(cos a)

, b^2 = a^2 + c^2 – 2ac(cos b), or c^2 = a^2 + b^2 - 2ab(cos c). you wouldn't use b. the law of sines as it is mostly effective when 1side and 2angles are given. a and c aren't the answer for they are the improper versions of the law of cosines. hope this is .

45

step-by-step explanation:

to find a percentage, add a decimal in front and multiply it by the other number.

.25 times 180= 45