Sonny has a stack of bricks. Each brick weighs 1`\frac{1}{4}` pounds. The stack of bricks weighs 8`\frac{3}{4}` pounds. How many bricks are in the stack?

i will pick c put check it over to be sure

step-by-step explanation:

answer: the first graph

step-by-step explanation:

a triangular prism is a 3 dimensional shape composed of triangles and rectangles. it is made from two triangular bases and three rectangular sides.  

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -