Which expression is equivalent to 5(2+7)?

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

Scott harris can invest $7,000 in a 1-year cd that earns interest at an annual rate of 4 percent compounded monthly. the amount per $1.00 is 1.040742. he can also invest $7,000 in a 1-year cd at annual rate of 4 percent compounded quarterly. the amount per $1.00 is 1.040604. what is the difference in the amount of interest earned for each investment? a) $0.96 b) $0.81 c) $0.87 d) $0.88

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?