I don't know if it's 74, but I got -80. here's how:
(3x + 5 x -4x + 7) (-4)
(8 x -4x + 7) (-4)
(8 x 3) (-4)
24 x -4 = -80
This problem is a projectile problem. The initial velocity is 50m/s at an optimum angle of 45. The maximum height or the height of the y component is at it's highest is asked.
Informtion needed:
Acceleration due to gravity = 9.81m/s^2
Formula:
Hmax = ((V^2)(sin(angle))^2)/2g
Hmax = ((50^2)(sin45)^2)/(2*9.81) = 63.71 or letter B 63.5 m is the closest answer.
Hey, There 20percntcooler! :)
To solve these equations, we will need to substitute.

or

We can substitute this for x so, we don't have to deal with two different variables.

or if substituted:

Solve for y.

Add like terms.

Subtract 4 from both sides.


Divide both sides by 3.


Now lets input the value for y into the equation to find the value of x.

Add 0 to both sides.




Hope this helps.
-Benjamin
Answer:
Step-by-step explanation:
The angle adjacent to the 106 degree angle is 180 degrees - 106 degrees, or 74 degrees. Next, the adjacent angle to the 145 degree angle is 35 degrees; in other words, the two bottom angles of this triangle are 35 degrees and 35 degrees. That means that a 35 degree angle is vertical angle to x, and so x is also 35 degrees.
The sum of the three interior angles is 35 degrees + 74 degrees and