Answer:
b
Step-by-step explanation:
When the object hits the ground , the h = 0 , that is
- 16t² + 54 = 0 ( subtract 54 from both sides )
- 16t² = - 54 ( divide both sides by - 16 )
t² = ( take square root of both sides )
t = ≈ 1.84 seconds ( to 2 dec. places )
Answer:
The coordinates of point S are (5, 9) will make line PQ // line RS ⇒ A
Step-by-step explanation:
<em>Parallel lines have the same slopes</em>
The slope of a line = Δy/Δx, where
Let us first find the slope of the line PQ.
∵ P = (-2, -2) and Q = (0, 7)
∴ Δx = 0 - (-2) = 0 + 2 = 2
∴ Δy = 7 - (-2) = 7 + 2 = 9
∴ The slope of PQ = 9/2
∵ Line PQ // line RS
∴ The slope of line PQ = the slope of line RS
∴ The slope of line RS =9/2
∵ Point R = (3, 0) and point S = (x, y)
∵ The slope of line RS = 9/2
∵ The slope = Δy/Δx
∴ Δy/Δx = 9/2
→ That means Δy = 9 and Δx = 2
∵ Δy = y - 0
∵ Δy = 9
∴ 9 = y
∵ Δx = x - 3
∵ Δx = 2
∴ 2 = x - 3
→ Add 3 to both sides
∴ 2 + 3 = x - 3 + 3
∴ 5 = x
∴ The coordinates of point S are (5, 9) will make line PQ // line RS
Answer:
<em>hope</em><em> </em><em>this</em><em> </em><em>helps</em><em> </em><em>you</em><em>.</em>
Answer:
The chart goes as follows.
| wearing a watch | no watch | total
wearing a belt | 62 | 32 | 94
no belt | 29 | 20 | 49
total | 91 | 52 | 143
Step-by-step explanation:
62 wear a belt and watch.
32 wear a belt but no watch.
29 wear a watch but no belt.
and 20 don't wear either.
Answer:
t=-105
Step-by-step explanation:
divide 7 by -1/15 to get t separated