The common factor of 7 and 15 is 1
Answer:
20
Step-by-step explanation:
The cost of the x mangoes was ...
c = 10(x/4)
The revenue from the sale of mangoes was ...
r = 20(x-5)/5
The profit is the difference between revenue and cost:
10 = r - c = 20(x -5)/5 -10(x/4) = 1.5x -20 . . . . substitute and simplify
30 = 1.5x . . . . . add 20
20 = x . . . . . . . .divide by 1.5
The trader bought 20 mangoes.
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<em>Check</em>
He paid 20(10/4) = 50 naira. He sold the 15 good mangoes for 20/5(15) = 60 naira, so made a 10 naira profit.
Answer:
Triangle A
Right
Triangle B
Acute
Triangle C
Obtuse
Triangle D
Acute
Step-by-step explanation:
Hello,
The method is to find the roots of the denominator.
x²-2x-15=x²+3x-5x-15=x(x+3)-5(x+3)=(x+3)(x-5)
Roots are x=-3 and x=5
Answer C
Answer:
0.7131 is the probability that the sample mean is greater than 32.6
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 33
Standard Deviation, σ = 7.46
Sample size, n = 110
Standard error due to sampling =
Formula:
P(sample mean is greater than 32.6)
Calculation the value from standard normal z table, we have,
0.7131 is the probability that the sample mean is greater than 32.6.