The sum of twice a number and ha;f the number is 10

4

Step-by-step explanation:

solution,

here,

Given , The sum of teice and half of the number So,

Let the number be x

According to the question,

2x + x/2 = 10

or, 4x + x = 2*10

or, 5x = 20

or, x = 20/5

or, x = 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!

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.