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Answer:
x = 2
Step-by-step explanation:
-12 = -3x²
divide through by -3
-12/-3 = -3x²/-3
4 = x²
square root both sides
[4]^½ = x²× x^½
so therefore: 2 = x
Answer:
6.79
Step-by-step explanation:
First of all, you will have to know how much is 3% of 7 in order to decrease it by that amount.
7 x 0.03 = 0.21
Now that you know the amount, you can subtract it from seven and therefore you have decreased 7 by 3%.
7 - 0.21 = 6.79