Core Math 6 2014 - MA3106 IC Are these expressions equivalent? Explain why or why
not
42 +35 7(6+5)
They are equivalent because 42+35=77 and 7(6+5)=77
Please help

yes

Step-by-step explanation:

when you add 6 and 5 you get 11

7 times 11 is 77

42 plus 35 is 77

they equal eachother

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!

1/3 + 1/3 ≠ 2/6 because 1/3 alone = 2/6  

step by step explanation:

1/3 + 1/3 = 2/3       2/3=4/6