We know:


substitute a = -3; b = 7; c = -15
Answer:
C
Step-by-step explanation:
(2x-3)(4x+5)
=2x(4x+5)-3(4x+5)
=8x^2+10x-12x-15
=8x^2-2x-15
Answer:
352
Step-by-step explanation:
512 - 256 + 128 - 64 + 32 = 352
Answer:
the answers are c, d, &f
Step-by-step explanation:
the equivalence to 12:3
1200:300. = 12:3 (reduce by 100)
12:3= 4:1 (reduce by 3)
24:6= 12:3 (reduce by 2)
area of tile = 6 *14 = 84 square inches
number of tiles = 8500/84 = 101.19
102 tiles are needed