What’s the surface area for this figure? (If u can please help!)

172cm^2

Step-by-step explanation:

Surface Area of Triangles;

A=B x H / 2

  =(4x3) /2

  = 6cm

 Multiply 6 by 2 since there are two triangles at both ends

6 x 2 =12cm^2

Surface area of the rectangles;

A=LW

  =10x5

  =50cm

Multiply by three since there are three triangles

50cm x 3 = 150cm^2

Add everything both total triangle and rectangle surface areas together

A= 12 + 150

  =172cm^2

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!

the answer is b