There is a very simple way of dealing with percentages.
"increase" means add
"decrease/discount/reduce" means subtract
Now, we know that the original price is 100%.
100% = 1 (like 50% = 0.5)
So if an object's price is x and it is 20% off, we get:
100%x - 20%x
Taking x common,
x(100% - 20%)
= 0.8x
Therefore, if we fist add/subtract the percentages we can multiply directly with the original to get the answer. This is as follows:
5] Increase 101 by 16%
1 + 0.16 = 1.16
So the answer is:
101 * 1.16
= 117.16
6] Decrease 36 by 21%
1 - 0.21 = 0.79
The answer is:
36 * 0.79
= 28.44
7] Let original price be x, we know it is 35% off
1 - 0.35
= 0.65
0.65x = 13
x = 20
Answer:
The answer is 5000 dollars
Step-by-step explanation:
What is it? You didn’t post anything?
Answer:
3/4 of a mile
Step-by-step explanation:
1/3x = 1/4
x = 1/4 * 1/3
x = 3/4
The values of <span> f(-2), f(-0.5), and f(3) can be solved by substituting the values inside the parentheses to the function to the variable x. We do as follows:
</span><span>1. f(x)=-x+4
</span>f(-2) =-x+4 = 2+4 = 6
f(-0.5) =-x+4 = 0.5 + 4 = 4.5
f(3) =-x+4 = -3+4 = 1<span>
2. f(x)= 3/8x-3
</span>f(-2)= 3/8x-3 = -15/4<span>
f(-0.5) </span>= 3/8x-3 = -51/16<span>
f(3) </span>= 3/8x-3 = -15/8
Hope these answers the question.
