Step-by-step explanation:
Question 1:
Question 2:
- 0.45z = 72
- z = 72 * (1/0.45) = 160.
9k² = 225
k² = 225 : 9
k² = 25
k = -5 and k = 5 because :
(-5)² = (-5) * (-5) = 25
5² = 5 * 5 = 25
Answer:
1) 25
2) (5+4)×2+6-(2×2)-1
Step-by-step explanation:
1) do exponents: 6×7-9×9+64,
do multiplication: 42-81+64,
do add & subtract: 25
2) (5+4)×2+6-(2×2)-1
(9)×2+6-(4)-1
18+6-4-1
=19
Answer:
-3
Step-by-step explanation:
Be smart you will learn
Substituting the value of X in each of the equations.The best answer would be the equation satisfying both of the sides.
Therefore,
Substituting the values in the second equation gives the best answer.
8(1.2)^2 + 34 = 45.52 centimeters