19. (X+5)-3
20. 2a
21.3b
22. 5y-5
23. 1/2n-15
Answer: D
Explanation: if you round it will be Volume ≈ 65.42 units^3
Answer:
45
Step-by-step explanation:
1/6 of 54= 9
9*5=45
∆ABC=∆DEF
AB=DE –>String
BC=EF–> Rib
m<C=m<F=90° –>List
AC=DF
So m<A=m<D=35 (It is not clear whether the number is 35 or 36, but the same number)
Answer: 219.375 miles
<u>Step-by-step explanation:</u>
d = r * t
= 67.5 * 3.25
= 219.375