The probability that a student will fail is 3/25, there are 25 of them, thus the sample space is 25 and 3 out of that is 3/25 or 0.12.
what's the probability that one will pass? well, the opposite of failing, thus is the complement of 0.12, namely, 1 - 0.12.
Answer: 8(x + (-5)) = 2x
Step-by-step explanation: Lets have that "certain" number be x. We wrote an equation to represent the problem.
You have to find a common denominator for the fractions. 5 and 7 both go into 35 which is the lowest common multiple of 5 and 7. 2/5 is multiplied by 7/7 and 3/7 is multiplied by 5/5. Then add the two fractions. So 29/35 parts are finished of the total number of bracelets.
Sarah bought 3 bracelets and 2 pairs of sunglasses.
Step-by-step explanation:
Total items bought = 5 items
Total spent = $24
Cost of one bracelet = $5
Cost of pair of sunglasses = $4.50
Let,
x be the number of bracelet bought.
y be the number of sunglasses bought.
According to given statement;
x+y=5 Eqn 1
5x+4.50y=24 Eqn 2
Multiplying Eqn 1 by 5

Subtracting Eqn 2 from Eqn 3

Dividing both sides by 0.50

Putting in Eqn 1

Sarah bought 3 bracelets and 2 pairs of sunglasses.
Keywords: linear equations, subtraction
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