Answer:
ratios, fractions, statistics, and percentage increase or decrease.
Step-by-step explanation:
5x+2/5=x-1/10
Convert 2/5 and -1/10 to equal fractions.
2/5= 4/10
5x+4/10= x-1/10
Subtract x on both sides.
4x+4/10= 1/10
Subtract 4/10 on both sides.
4x=-3/10
Divide both sides by 4.
x=-0.075
I hope this helps!
~kaikers
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.
A) 276 / 138 = 2
B) 26/2 = 13, 13/2 = 6.5
Answer is B
Answer:
we have x = -62 or x = 66
Step-by-step explanation:
16=(x-2)^2/3
I would take square root first
4 = (x - 2)^ (1/3)
or -4 = (x - 2)^(1/3)
.....
4^3 = x - 2
64 = x - 2
x = 66
or -4 ^3 = x - 2
-64 = x - 2
x = -62
we have x = -62 or x = 66
