Answer:
f(x) = -3x + 4
Second option
Step-by-step explanation:
In function notation, the <u>"y" variable is isolated and replaced with "f(x)"</u>.
Isolate "y" by keeping "y" on the left and moving everything else to the right. To move something, do its reverse operation to both sides.
9x + 3y = 12
9x + 3y - 9x = 12 - 9x Do -9x on both sides
3y = -9x + 12
3y/3 = -9x/3 + 12/3 Divide by 3 on both sides
y = -3x + 4 Change to function notation
f(x) = -3x + 4 Answer
Answer:
70 sq ft
Step-by-step explanation:
count the squares.
Answer:
C
Step-by-step explanation:
Area of a circle = pi × r²
Area = 3.14 × 16²
803.84 cm²
9514 1404 393
Answer:
C. 36√3 square units
Step-by-step explanation:
Your knowledge of special triangles tells you that height CD is ...
CD = 6√3
so the area is ...
A = 1/2bh
A = 1/2(12)(6√3) = 36√3 . . . . square units
_____
<em>Additional comment</em>
The 30°-60°-90° right triangle that is half an equilateral triangle has a short side equal to half the length of the long side. The Pythagorean theorem tells you that the middle-length side is √(2²-1²) = √3 times the shortest side. That is, the side length ratios in this "special" triangle are ...
1 : √3 : 2
This means the length DB is 12/2 = 6, and the length CD is 6√3.
