If the average of four scores is going to be 93,
then the four scores will add up to (4 x 93) = 372 .
The first three scores add up to (95 + 92 + 89) = 276 .
In order to reach a 93 average for four scores,
Brenda needs (372 - 276) = 96 on the fourth test.
Yay Brenda ! It'll be tough, but you can do it !
I dont think this may be right but i think it is 401
<span>First of all, there should be coherence for the units of measurement -- either they are all meters or they are all ft. I would assume they are all ft.
The correct answer is 75 ft above. T
The explanation is the following: suppose the ground level is the x-axis, the 2 feet of the arch lie respectively on (0,0) and (100,0) on the ground level. Since the arch is 100ft high, the vertex of the parabola will be the point (100,100). Thus, we can find the equation describing the parabola by putting the three points we know in a system and we find that the equation of the parabola is y=(-1/100)x^2+2
To find the focus F, we apply the formula for the focus of a vertical axis parabola, i.e. F(-b/2a;(1-b^2+4ac)/4a).
By substituting a=-1/100, b=2 and c=0 into the formula, we find that the coordinates of the focus F are (100,75).
So we conclude that the focus lies 75ft above ground.</span>
X=1,
X=-3
Use Photomath it helps
Answer:
3.5 cm
Step-by-step explanation:
6x-1=4x+6
6x-4x=1+6
2x=7
x=7÷2
x=3.5
I hope my answer will help you and i guess it's correct
