Answer:
56 7/10
Step-by-step explanation:
convert 40 1/2 to a fraction 40 1/2 = 81/2
multiply both sides by 7/5
this gets w by itself on the left
81/2 x 7/5 = 567/10 = 56 7/10
F(x)=5
f(1)=5 it was just the (x) that should be substituted
Step One
Find the total number of rocks in the gravel pit
58 + 213 + 522 = 793
Step Two
Set up the probabilities.
P(Sedimentary) = 58 / 793 = 0.0731
P(metamorphic) = 213/ 793 =0.2686
P(igneous) = 522 / 793 = 0.6583
Check
When these are added together the answer should be one.
0.0731 + 0.2686 + 0.6583 = 1 just as it should.
It would be B because you would take amelias age and take two away since todd is five years younger to get the a-5.
hope this helps :)