Answer:
Your answer is D. 16 3/4
Step-by-step explanation:
10 1/12 + 6 2/3 = 67
4
= 16 3/4
= 16.75
Calculation steps
Conversion a mixed number to a improper fraction: 10 1/12 = 10 · 12 + 1/12
= 121/12
Conversion a mixed number to a improper fraction:
6 2/3 = 6 · 3+2/3
= 20/3
Add: 121/12 + 20/3 = 121/12 + 20 · 4/3 · 4 = 121/12 + 80 12 = 121 + 80/12 = 201/12 = 67/4
Answer:
126 people
Step-by-step explanation:
Given that, ratio of people who preferred tea to those who preferred coffee = 9:5
Let number of people who preferred coffee = x
Number of people who preferred tea = x + 36
Total number of people in survey = x + (x+36)
Ratio of people who preferred tea to those who preferred coffee = (x + 36)/x = 9/5
Cross multiply to solve for x
5(x + 36) = x(9)
5x + 180 = 9x
Subtract 5x from both sides
180 = 9x - 5x
180 = 4x
Divide both sides by 4
180/4 = x
45 = x
x = 45
<em>Number of people who preferred coffee = x = 45</em>
<em>Number of people who preferred tea = x + 36 = 45 + 36 = 81</em>
<em>Total number of people in the survey = x + (x + 36) = 45 + 81 = 126 people</em>
Often, the simplest way to solve "ax2 + bx + c = 0" for the value of x is to factor the quadratic, set each factor equal to zero, and then solve each factor. But sometimes the quadratic is too messy, or it doesn't factor at all, or you just don't feel like factoring.
Answer:brainliest plsssss
Step-by-step explanation:
1/2x+15=x
X+30=2x
30=2x-x
30=x
Number of girls in class
30-12=18
☆ the number of girls in his class are 18
