All them all together than divide that number by the amount of numbers you added together to get 79
Answer:
6
Step-by-step explanation:
Alright! So, this might seem complicated at first, but in the end its just a bit of algebra. If we think of a triangle, adding all of the sides together creates the perimeter. This means that 3(x-3) + 4x-1 + 2x+5 = 49. After this we can simplify to 9x - 5 = 49, and 9x = 54. Since 54/9 = 6, this means that x = 6.
13y+x-7y. The answer to this expression is 6y+x
tan(70)=12cm/y The tangent of the angle equals the opposite over the adjacent
y=12cm/tan(70) Isolate y and plug into calculator
y = 4.4 cm (Rounded to the nearest tenth)