A rock is tossed from the top of a bridge into the water below and is represented by the equation f(x) = -2x2 + 5x + 7, where f(x) is
the height of the rock in metres and x is the time in seconds.
Find the roots of the equation to determine how long it took
for the rock to enter the water.
• When you solved the equation, you got two different values
for x. Why is only one of the values an appropriate answer?

intensity of the vector is v= √37 ≈ 6.08 units and make angle ∡α ≈ 9.46° with east direction

step-by-step explanation:

required vector is consists of the two componentsvx= 2+4=6 units   and vy= 1 unit and vx ⊥ vywe will use pythagorian theorem to find intensity of the vector vv∧2 = vx∧2 + vy∧2 => v = √vx∧2 + vy∧2 = √6∧2 + 1∧2 = √36+1 = √37 ≈ 6.08 unitsthe angle ∡α between vector and east direction we wil find with tanαtanα = 1/6 => α = arc tanα = arc 1/6 => α ≈ 9.46°

hope this

25.2

step-by-step explanation:

2+4x6-8/10= 25.2

x is greater than 5

step-by-step explanation:

2x+7 is greater than 17

    -7                           -7

2x is greater than 10

divide by 2 each side

x is greater than 5