find the area of the trapezoid by decomposing it into other shapes.
a) 25 cm?
b) 27 cm?
c) 30 cm?
d) 35 cm?

C

Step-by-step explanation:

You can decompose it into two triangles and one rectangle. The rectangle has a length of 4 and the width is 5. The area of the rectangle is 20.

The right triangle has a height of 5 and a base of 1. You multiply it to get 5 then divide by 2. The right triangle has an area of 2.5.

The left triangle has a height of 5 and a base of 3. (7cm - 4 cm) Multiply to get 15 and divide by 2. The left triangle has an area of 7.5.

Add all three up.

20 + 2.5 +7.5

30

1.true 2.false? ? i think. .

step-by-step explanation:

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!