Okay so lets look at what it says.
Opposite in the case of math almost always means negative. So (2(-n)+5)*2. This can be simplified to (-2n+5)*2 = 22 + n
Again, simplify it and its -4n+10 = 22 + n
Subtract 10 from both sides and its -4n = 12 + n
Add 4n to both sides and you get 0 = 12 + 5n
Subtract 12 from both sides and its 5n = -12.
Divided both sides by five and you have n = -12/5
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:
ax+by =c
Step-by-step explanation:
where a and b are the coifficients of the x and y variable respectively
Your choice of answer D is correct.
_____
When the number of days is zero, the height is 130 inches. This eliminates choices B and C. Evaluating the expression for n=13 gives
... 130 + 13×13 = 130 + 169 = 299 . . . . . corresponding to answer D.
Answer:
x-30y=100 and 10y=x-20
Step-by-step explanation: