Sam‘s final grade for an class is based on his sores form a midterm test (m), a project (p) and a final exam ( f). the midterm test counts twice as much as the project, and the final exam counts twice as much as the midterm. which mathematical expression below can be used to calculate sam‘s final grade?
a. p+m+f
b. p+2m+4f
c. p+2m+f
d. p+m+2f

B

Step-by-step explanation:2 is double 1 and 4 is double 2

f is the midpoint of

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!