9514 1404 393
Answer:
4
Step-by-step explanation:
The 10 non-yellow counters in the bag represent 5/7 of the total number of counters, c.
10 = (5/7)c
10(7/5) = c = 14
There are 14 counters in the bag, of which 14-10 = 4 are yellow.
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<em>Alternate solution</em>
Let y represent the number of yellow counters in the bag. The probability of drawing a yellow counter is the number of yellow counters divided by the total number of counters:
y/(y +3 +7) = 2/7
Multiply both sides of this equation by 7(y+10) to get ...
7y = 2(y +10)
7y = 2y +20 . . . . eliminate parentheses
5y = 20 . . . . . . . . subtract 2y
y = 20/5 = 4 . . . . divide by the coefficient of y
There are 4 yellow counters in the bag before any are taken.
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<em>Another alternate solution</em>
If the probability of yellow is 2/7, the ratio of yellow (y) to non-yellow is ...
yellow : non-yellow = 2 : (7-2) = 2 : 5 = y : (3+7) = y : 10 = 4 : 10
⇒ y = 4
There are 4 yellow counters in the bag.
The answer to the question is rational.
Answer:6
Step-by-step explanation: add up all the fractions. The answer will be 24/4. Divide 24/4 equals 6.
Standard form:
5,098,000
Scientific notation.
1) only 1 digit should be before the decimal point.
5.098000
2) only non-zero number must be part of the coefficient. the rest are included in the base of 10.
5.098 x 10^6 Choice D.
Exponent is the number of times the decimal moved from its original placement to its place after the 1st digit.