<span>A. {+8) is the answer
</span>
Answer:
30
Step-by-step explanation:
Formulate:
50%×60
0.5×60
= 30
X= (85+92+88+98)/4
The slash means to divide. So you’re making a fraction with all the scores on top and the number of scores on the bottom.
Applying the equation for the area of the trapezoid, it is found that the height is of 10 cm.
The <em>area of a trapezoid</em> is <u>half the multiplication of the sum of the bases and the height</u>, that is:
For this problem, we have that: 
, hence:
The height is of 10 cm.
To learn more about area of a trapezoid, brainly.com/question/9918120
Answer:
x =70
Step-by-step explanation:
The variation model we'll need here is y = kxz, where k is the constant of proportionality. We are told that when y = 105, x = 2 and z = 9. This gives us enough info with which to calculate k:
9 = k(2)(9), or 1 = 2k, or k = 1/2.
Then the governing equation is
y = (1/2)xz.
If y = 105 when z = 3, then we have 105 = (1/2)(x)(3).
To solve this for x, first multiply both sides by 2, obtaining 210 = 3x.
Finally, we divide both sides by 3, obtaining the final result x = 70
