You want
. We can go about this by casework. WLOG x=9, we have 8 digits: 1-8. With x=8 we have 2-9, but we already counted 8 and we already considered the 9 case, so we have 2-7 actually, which will give us 6 numbers. With x=7, with the same logic we are only looking for the numbers 3-6 which there are 4 of. With x=6, you are looking for the numbers 4-5 which are 2. With x=5 run out of numbers to pick. The numbers are indistinguishable and it does not matter whether we use x or y so we just have to ad up the cases we already have to get: 20.
Answer:
Step-by-step explanation:
<u>Given function:</u>
A model rocket is launched off the ground at an initial velocity of 80 feet per second.
<u>This gives us </u>
<u>The function becomes:</u>
Correct option is B.
Answer:
15
Step-by-step explanation:
By the diagram, you can see the sum of segment AB and segment BC is segment AC. Adding the given expressions for AB and B is
. Simplifying the equation
, gives
. Substituting
in the equation for segment AC gives 15.
Answer: 30.9842843211
Step-by-step explanation:
194.68÷3.14= 61.9685686423
61.9685686423÷2= 30.9842843211
By defferentiating the about using product rule
vdyu/dx +udvdx
dy/dx 4×^3 +6×^2-4× -4=o