Answer:
A: 15%
Step-by-step explanation:
First test:
15 ÷ 20 = 0.75
0.75 * 100 = 75%
Second Test:
18 ÷ 20 = 0.9
0.9 * 100 = 90%
90% - 75% = 15%
Answer:
Slower speed = 9 mph
Step-by-step explanation:
Let the initial speed (slower speed) = s mph
Speed 's' =
s = -------(1)
If the cyclist increases the speed by 3 mph then the final speed = (s + 3) mph
He can reduce the time 't' by 10 minutes ( hours)
Now, (s + 3) =
s + 3 = --------(2)
Substitute the value of 's' from equation (1) to the equation (2).
6t² - t = 2
6t² - t - 2 = 0
6t² - 4t + 3t - 2 = 0
2t(3t - 2) + 1(3t - 2) = 0
(2t + 1)(3t - 2) = 0
t = hours
But the time can't be negative.
Therefore, t = hours is the answer.
From equation (1),
s =
s = 9 miles per hour.
Slower speed = 9 mph is the answer.
Answer:
12%
Step-by-step explanation:
0.9/7.5 *100
= 12%
We know that
[volume of the prism]=L*W*H
L=x²*y in
W=x in
H=y² in
[volume of the prism]=(x²*y)*(x)*(y²)-----> x³*y³ in³
the answer is
x³*y³ in³
I’m tired I’ve so much homework to complete and a long day of school :(