11. Simplify: {(5/2×1/10)+ 7/3 × 5/2} - (4/3 ×13/8) 12. Write any 5 rational numbers between −5/7 and 7/8 13. Subtract the sum of −2/3 and 1/3 from the sum of 5/3 and −4/3. 14. Divide the sum of 18/5 and −71/5 by their difference. 15. What should be added to (1/2+1/3+1/5) to get 4?

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

ion

step-by-step explanation:

ion ion ion ion ion ion ion ion ion ion ion

this is the formula: v = the value of investment at the end of the time period

p = the principal amount (the initial amount invested)

r = the annual interest rate

n = the annual frequency of compounding (how many times a year interest is added)

t = the number of years the money is invested

^ means raise to the power of