Answer:80%
Step-by-step explanation:
18/90 × 100%
=20%
he got 20% of the questions wrong
100% - 20% =80%
=>he got 80% of the questions correct
Answer:
Step-by-step explanation:
<u>Use two points on the graph to get an equation:</u>
<u>The slope</u>: m = (60 - 8)/6 = 8.667
<u>The y- intercept</u> is 8
<u>The equation of the line of best fit:</u>
Answer:
Expected winnings for one spin = 0.1
Step-by-step explanation:
Expected Value = Sum of [(Probability of X)(Value of X)]
E(X) = Σ [P(X).X]
Two Events : X = +68 , P(X) = 1/38 and X = -2 , P(X) = 37/38
E(X) = [(68) (1/38)] + [(-2)(37/38)]
[(68)(0.03)] + [(-2)(0.97)]
= 2.04 - 1.94
= 0.1
Let the constant of variation be c.
We are given that y varies inversely with 2.5x, this means that:
y = (c) / (2.5x)
This can be written as:
2.5xy = c
Now, we a re given that y = 5.6 at x = 30.
Substitute with these values in the equation to get the value of c as follows:
2.5xy = c
2.5(30)(5.6) = c
c = 420
Therefore, the equation that describes the relation is:
2.5xy = 420
Answer:
π = 3.142. π (pi) is the ratio of the diameter to the circumference of a circle. ...
144 = 12" x 12" = the number of square inches in 1 square foot. The math is easier if you measure everything in inches and divide the final answer by 144 to find the number of square feet.
