Answer:
x = -13/5
Step-by-step explanation:
let x be the number
8x + 6 = 3x - 7
move variables to left and numbers to right
8x - 3x = - 7 -6
5x = -13
x = -13/5
The first, third, and sixth are correct.
Answer:
c ≈ 9.1 m
Step-by-step explanation:
Using Pythagoras' identity in the right triangle.
The square on the hypotenuse is equal to the sum of the squares on the other 2 sides , that is
c² = 4.1² + 8.1² = 16.81 + 65.61 = 82.42 ( take square root of both sides )
c =
≈ 9.1 m ( to the nearest tenth )
Answer:
6cm
Step-by-step explanation:
14
4^4 * 4^(-9) = 4^(4-9) = 4^(-5) or 1/(4^5)