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9514 1404 393
Answer:
450 L
Step-by-step explanation:
Let x represent the number of liters of 70% solution needed. Then the amount of 15% solution needed is (550-x), and the total amount of acid in the mixture is ...
0.70x + 0.15(550-x) = 0.60(550)
0.55x + 82.5 = 330 . . . . simplify
0.55x = 247.5 . . . . . . . . . subtract 82.5
x = 450 . . . . . . . . . . . divide by 0.55
450 liters of 70% acid solution must be used.
2p+9=25
2p=25-9
2p = 16
p = 8
You can prove this is true because
8 pens plus 8+9 pencils are 25
Answer:
2(d-vt)=-at^2
a=2(d-vt)/t^2
at^2=2(d-vt)
Step-by-step explanation:
Arrange the equations in the correct sequence to rewrite the formula for displacement, d = vt—1/2at^2 to find a. In the formula, d is
displacement, v is final velocity, a is acceleration, and t is time.
Given the formula for calculating the displacement of a body as shown below;
d=vt - 1/2at^2
Where,
d = displacement
v = final velocity
a = acceleration
t = time
To make acceleration(a), the subject of the formula
Subtract vt from both sides of the equation
d=vt - 1/2at^2
d - vt=vt - vt - 1/2at^2
d - vt= -1/2at^2
2(d - vt) = -at^2
Divide both sides by t^2
2(d - vt) / t^2 = -at^2 / t^2
2(d - vt) / t^2 = -a
a= -2(d - vt) / t^2
a=2(vt - d) / t^2
2(vt-d)=at^2
From the calculation below, the probability that a tourist will spend more than $250 on the 2 legs of the trip is 2/3.
<h3>How do we calculate the amount spent using probability?</h3>
From the question, the number of possible options available and their total amount is as follows:
Airplane and Van = $350 + $60 = $410
Airplane and Cab = $350 + $40 = $390
Bus and Van = $150 + $60 = $210
Bus and Cab = $150 + $40 = $190
Train and Van = $225 + $60 = $285
Train and Cab = $225 + $40 = $265
From the above, it can be observed that we have a total number of 6 different options available and 4 of the options are more than $250.
Therefore, we have:
Probability of spending more than $250 = Number of options that are more than $250 / Total number of different options = 4/6 = 2/3
Learn more about probability here: brainly.com/question/11034287.
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