Answer:d
Step-by-step explanation:
Answer:
Step-by-step explanation:
The two triangles are similar and therefore we can set up a proportion
9/(9 + 72) = (3x - 20)/(3x - 20 + 56) Combine like terms on the right
9/(81) = (3x - 20)/(3x + 36) Cross multiply
9(3x + 36) = 81 (3x - 20) Remove the brackets.
27x + 324 +1620 = 243x Add 1620 to both sides
27x + 324 + 1620 = 243x Subtract 27x from both
1944 = 216x divide both sides by 216
x = 9
If you feel comfortable canceling the size of the numbers can be reduced.
9/81 = 1/9
1/9 = (3x - 20)/(3x + 36)
3x + 36 = 9(3x - 20)
3x + 36 = 27x - 180
36 + 180 = 24x
216 = 24x
216/24 = x
x = 9
There is another cancelation possible, but this is simple enough.
1
Week = w
1 hour = d
Formula
w = dm + c
The m is the gradient
The c is the d when w is 0
First let’s do m
m is basically how much the d changes from one point to another
So how much does d changes from 20 to 15.5
Write answer in comments then I will continue
Answer:
First evaluate 4^t
put x= 1 in 4^x
It's 4^1 = 4 but f(x) = 8
So we need to multiply with 2
So it's A) 2.4^x
(4 + 4 - 0.4) / 0.4 = (8 - 0.4) / 0.4 = 7.6 / 0.4 = 19
