Answer:
A = 13
Step-by-step explanation:
To find the area of a triangle, multiply the base by the height, and then divide by 2.
13 x 2 = 26
26 / 2 = 13
Answer:
x = 5/6-4y^2
Step-by-step explanation:
^ = to the power of and * = times
y = square root of 6x-5/4x
(times by the square root on either side, sorry I don't know how to word it)
y^2=6x-5/4x
(times by 4x either side)
4xy^2= 6x-5
(+5 either side)
4xy^2+5=6x
(-4xy^2 either side)
5=6x-4xy^2
(factorize)
5=x(6-4y^2)
(divide by (6-4y^2))
5/6-4y^2 = x or x = 5/6-4y^2
Tell me if this is incorrect.
Answer:
There are 1,500 books in Library 1
Step-by-step explanation:
30 = 0.02x
Divide 0.02(or 2%) from both sides
1,500
You need to divide the 20 books by the percentage that they are compared to the total amount.
Answer:
x = 12
Step-by-step explanation:
First we need to add x & 1/4x.
Pretend there's a 1 infront of x, so that the equation looks like:
1x + 1/4x = 15
To combine the two terms, we need to get the 1 to have the same denominator as 1/4, so let's multiply 1 (which is the same as 1/1) by 4/4.
You get 4/4! Substitute that into the equation:
4/4x + 1/4x = 15
Now combine the terms:
(4/4x + 1/4x = 5/4x)
5/4x = 15
Finally, multiply both sides by 4/5 to cancel out the 5/4:
x = 15*4/5
x = 60/5
x = 12
Hope it helps (●'◡'●)
Answer:
a = 20
Step-by-step explanation:
The mean is calculated as
mean =
= =
Then
= 27 ( multiply both sides by 5 to clear the fraction )
115 + a = 135 ( subtract 115 from both sides )
a = 20