Answer:
1. yes
2. yes
3. no
4. no
5. yes
Step-by-step explanation:
Answer:
Four times his sister's age would be 4b. his age is two years less, so we need to subtract 2.
put together, this is 4b - 2.
Answer:
Isolate the variable by dividing each side by factors that don't contain the variable.
x= 40
Answer:
12.56 square cm
Step-by-step explanation:
Let A be the area of the sector of circle.

Answer:
x=4
Step-by-step explanation:
log(2x-7) = 0
10^[log(2x-7)] = 10^0
2x-7 = 1
2x = 8
x = 4