Answer:
Will's age = 9 years
Bill's age = 11years
Step-by-step explanation:
Let will age = x
Bill = x +2 since he is 2 years older
x(x+2) = 5( x +x+2) - 1
Opening brackets
x² + 2x = 5(2x + 2) - 1
x² + 2x = 10x + 10 - 1
x² + 2x = 10x + 9
Collect like terms
x² + 2x - 10x - 9 = 0
x² - 8x - 9 = 0
Solve quadratically using factorisation method by finding two factors of +9 that can add up to give -8, the coefficient of x.
The factors are -9 and +1
x² + x - 9x - 9 = 0
x(x + 1) -9( x +1)
x+1) (x -9) =0
x + 1 = 0 or x -9 =0
x = -1 or 9
Age can not be negative
Therefore,
Will's age = 9 years
Bill's age = x+2 = 9+2 = 11years
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Answer:
6.4 cm
Step-by-step explanation:
Area of triangle = 17.28 cm²
Answer:
42 inches
By regulation it may be no more than 2.75 inches (7.0 cm) in diameter at the thickest part and no more than 42 inches (1.067 m) in length.
Step-by-step explanation:
baseball bat - is a smooth wooden or metal club used in the sport of baseball to hit the ball after it is thrown by the pitcher.
length- a measure of distance.
9 is 1/10 of 90 because if you add 1 zero it is 90
Answer: 0.7030
Step-by-step explanation:
Given : The population proportion for company's orders come from first-time customers : p=0.43
Sample size : n= 98
The test statistic for population proportion:-
For , 
For , 
Hence, the probability that the sample proportion is between 0.33 and 0.46 is 0.7030.
