Answer:
14 did not finish under 4 hours.
Step-by-step explanation:
Givens
Total number of competitors = 35
% who finish under 4 hours = 60%
Formula
Those who did not = 35 - 60%*35
Solution
Those who did finish under 4 hours = 35 * 60%
Those who did finish under 4 hours = 35*60/100 = 2100/100
Those who did finish under 4 hours = 21
Those who did not = 35 - 35*60/100
Those who did not = 35 - 21
Those who did not = 14
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There is another way to do this. Realize that 40% did not finish the race in under 4 hours.
Those who did not finish in under 4 hours = 35*40/100 = 1400 / 100 = 14
Answer:
Step-by-step explanation:
Find all solutions to the equation.
7 sin^2(x) - 14 sin x + 2 = -5
7sin^2(x)-14 sin x+7 =0
sin^2(x)-2sin x+1 =0
(sinx-1)(sinx-1)=0
sinx=1
x=π/2+2pi*k, k=integer
Answer:
YES
Step-by-step explanation:
Any straight line can be represented by an equation of the form
Y = mX + b
where m is the slope and b is the Y intercept, so these two equations are lines. The only solution is where the two lines cross, so must satisfy both equations. Plugging in 3 for X and -2 for Y we get
Y = -3X + 7
-2 = -3(3) + 7
-2 = -9 + 7
-2 = -2 True
AND,
Y = 2X - 8
-2 = 2(3) - 8
-2 = 6 - 8
-2 = -2 True
So since both are true, yes (3, -2) is the solution.
Answer:
is this a question? also, 6/4 is not irrational, it is rational, and an irrational number is a number that cannot be expressed as a ratio of two integers, aka a simple fraction
