Answer:
x = 30
Step-by-step explanation:
Put in proportions =
Cross multiply and get 27x = 45 x 18
OR...
27x = 810.
THEN...
divide by 27 on both sides to get 30
x = 30
Model house dimensions
5 cm × 4 cm = 20 cm²
1 cm = 1.5 m
multiply cm by 1.5 = meters
5 × 1.5 = 7.5 m
4 × 1.5 = 6 m
Real house dimensions
7.5 m × 6 m = 45 m²
Answer:
y=1/2x-7
Step-by-step explanation:
-9=1/2(-4)+b
-9=-2+b
b=-7
y=1/2x-7
Answer:
x² + 6x + 9
Step-by-step explanation:
(x + 3)² = (x + 3)(x + 3)
Each term in the second factor is multiplied by each term in the first factor , that is
x(x + 3) + 3(x + 3) ← distribute parenthesis
= x² + 3x + 3x + 9 ← collect like terms
= x² + 6x + 9
Well i think the answer is 2