Answer: x=2 y=-2
(2,-2) one solution
Step-by-step explanation:
Solve by substitution
Option B:
General formula for the height(feet) of a projectile over time:
where h represents height (feet)
t represents time
represents initial velocity
represents initial height(feet)
General formula for the height(metres) of a projectile over time:
where h represents height (feet)
t represents time
represents initial velocity
represents initial height(metres)
<u>Given data in the question:</u>
metre
m/s
To determine the equation to find time:
Substitute and in general formula for the height(metres) of a projectile over time:
Therefore option B is the correct answer.
Answer:
<h2>7. 62.8 sq.in.</h2><h2>8. 21.2 sq.in.</h2>
Step-by-step explanation:
The formula of an area of a triangle:
a, b - adjacent sides
θ - included angle
=============================================
7.
a = 9in, b = 14in, θ = 85°
sin85° ≈ 0.9962
Substitute:
8.
a = 12 in, b = 5 in, θ = 135°
sin135° = sin(180° - 45°) = sin45° ≈ 0.7071 <em>used sin(180° - x) = sin(x)</em>
Substitute: