Answer:
400
Step-by-step explanation:
Percentage decrease = 20% × 500
New value = 500 - Percentage decrease
500 - (20% × 500) =
500 - 20% × 500 =
(1 - 20%) × 500 =
(100% - 20%) × 500 =
80% × 500 =
80 ÷ 100 × 500 =
80 × 500 ÷ 100 =
40,000 ÷ 100 =
400
Answer:
40 years old
Step-by-step explanation:
Here a = 2, b = -2, c = -1
b^2-4ac = (-2)^2 - 4(2)(-1)
= 4 +8
= 12
Answer:
AD = 12 units
Step-by-step explanation:
AD = CD
so
4x = 10x-18
subtract 10x from both sides to get:
-6x = -18
divide each side by -6 to get:
x = 3
insert x into your problem and you get 4(3) which equals 12
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