This is the concept of application of quadratic equations; To get the number of dimes and quarters we proceed as follows;
suppose there are x dimes and y quarters;
x+y=95.......i
but we know;
$0.1=1 dimes
$0.25=1 quarters
thus
0.1x+0.25y=23.45.....ii
solving equation i and ii by substitution we shall have:
from i;
x=95-y
thus substituting the value of x in equation ii we get
0.1(95-y)+0.25y=23.45
9.5-0.1y+0.25y=23.45
collecting like terms we get:
0.15y=13.95
dividing both sides by 0.15 we get;
y=13.95/0.15=93
x=95-93=2
therefore we conclude that there were 2 dimes and 93 quarters
Remember if straight line total is 180 degree
You have to remember that 1 equal 100% and that what you need to do is just to multiply the number by 100 and add at the end symbol % .
<span>.0015 * 100 = 0.15% </span>
Answer:
1/10 or 10%
Step-by-step explanation:
<u>There are 6 numbers:</u>
<u>Probability of drawing 3 is:</u>
<u>Then probability of drawing an even number is:</u>
- 3/5 as 3 even numbers out of 5 total numbers left
<u>Combination of two above is:</u>
