3755 x .4 = 1502$. He earned 1502$
Answer:
The correct option in both cases is None of these
Step-by-step explanation:
(1.5x , 1.5y)
means we had (x,y) before
we only had to multiply each of the two by 1.5
So the percentage enlargement will be;
(1.5x-x)/x * 100
= 0.5x/x * 100
= 0.5 * 100 = 50%
The answer is none of these
for the second one, we have
(0.7x-x)/x * 100%
= -0.3x/x * 100%
= -30%
This is a 30% reduction
The answer here too is none of these
Answer:
0
Step-by-step explanation:
-20.5 is the same as -20.5
, since anything to the zero power is equal to 1.
Answer:
40 miles
Step-by-step explanation:
Let's set <em>x</em> to the number of miles driven, and <em>t</em> to the number of hours it took to drive.
We know that 40<em>t</em> is equal to <em>x</em>.
We also know that 40<em>t</em> is equal to 30(<em>t</em> + 1/3).
Solve for t:
40t = 30(t+1/3)
40t = 30t + 10
Subtract 30t from both sides:
10t = 10
Divide 10 from both sides:
t = 1
40t = 40 x 1 = 40 miles
