Answer:
T.A. = 144 + 36√3 units²
Step-by-step explanation:
∵ The total surface area of the pyramid = the sum of the area of
the four faces (one base and 3 side faces)
∵ The 3 side faces have the same dimensions 12 , 10 , 10
∴ the area of the 3 faces = 3 × 1/2 × 12 × h
∵ The height of each triangle is ⊥ to its base
∵ The triangle are isosceles
∴ The height bisects the base
∴ h² = 10² - 6² = 64
∴ h = √64 = 8
∴ The area of the 3 triangles = 3 × 1/2 × 12 × 8 = 144 units²
∵ The base is equilateral Δ with side length 12
∵ Area equilateral triangle = 1/4 × s² × √3
∴ The area of the base = 1/4 × (12)² × √3 = 36√3 units²
∴ T.A. = 144 + 36√3 units²
Answer:
A
Step-by-step explanation:
A line of best fit needs to match the direction of the points and fit in-between the points as much as possible
C is not the right direction
D is not the right direction
B is to the left of the points
Answer:
7x^2 - 12x - 10
Step-by-step explanation:
5x^2 - 8x + 1 + (x^2 - 4x - 11)
7x^2 - 8x + 1 - 4x - 11
We know that
the percent<span> equation. is equal to
A = </span>P<span> × </span><span>B
part a)</span><span>What is 50% of 80?
P=50%----> 0.50
B=80
A=0.50*80
part b) </span><span>70% of what number is 32?
P=70%----> 0.70
A=32
B=?
A=P*B
32=0.70*B</span>
Answer:
Answer: <u> </u><u>x²</u><u>(</u><u>5</u><u> </u><u>+</u><u> </u><u>4</u><u>2</u><u>x</u><u> </u><u>-</u><u> </u><u>3</u><u>0</u><u>x</u><u>²</u><u>)</u><u> </u>
Step-by-step explanation:
» First factorise out x²:
» Then factorise the second bracket using quadratic knowledge:
» The second bracket can not be factorised further because its roots/zeros are not whole numbers
