Answer:
B
Step-by-step explanation:
To find the y-intercept, plug in x=0 in the original equation. (You want to find what y is when x=0)
2x + 3y = -12
2(0) + 3y = -12 (Plug in x=0)
3y = -12 (2*0=0, so you can ignore that part)
y = -4 (Divide both sides by 3)
This narrows down our choices to either A or B.
To find the x-intercept, plug in y=0 into the original equation. (You want to find what x is when y=0)
2x + 3y = -12
2x + 3(0) = -12 (Plug in y=0)
2x = -12 (3*0=0, so you can ignore that part)
x = -6 (Divide both sides by 2)
If our x intercept is -6 and our y intercept is -4, that makes our answer B.
E=0.5mv^2
That's the formula for kenetic energy. The only unknown we don't have is the velocity. In perticular the final velocity. To find this final velocity we need to use kinematic equations. Since we have the time and I'm also assuming that the initial velocity was zero we're going to use Vf=Vi+at. The acceleration is 9.8m/s^2 because its free fall and we have the time 22s. Vf= 9.8*22=215.6m/s
Now that we have the final velocity plug it in to the kenetic energy formula.
=0.5*3*215.6^2= 69725.04J
Answer:
2.4in.
Step-by-step explanation:
If 125 miles is an inch, then it could be put into an equation like this: 125x=300. To solve it, divide both sides 125 to leave X alone on one side. X=2.4. Since 125= 1inch, then there is no more work needed.
Answer:
1)v=-2/45 2)y=-6.31
Step-by-step explanation:
1) -9/4v+4/5=7/8
-9(10)v+4(8)=7(5)
-90v+32=35
-90v=4
v=-4/90
v=-2/45
2)7.3y-5.81=-51.9
7.3y=-51.9+5.81
7.3y=-46.09
y=-6.31
