Definition
A y-intercept is the place where a line or curve crosses, or touches, the y-axis - the vertical, often darkened line in the center of a graph. It is also the point at which x = 0.
If there are 18 people, then 12 of them are athletes.
If there are 3 athletes, then there are 12 musicians.
The number of musicians is 3 times the number of athletes
Answer: The answer is (D) The number of musicians is 3 times the number of athletes.
Step-by-step explanation: Given that the ratio of musicians to athletes in a school is 3 : 1. We are to select the correct statement out of the given four options.
Since the total number of people are not given, so we cannot say that 13 of them are musicians. Therefore, option (A) is incorrect.
If there are 18 people, then number of athletes is given by
and hence the option (B) is not correct.
If there are 3 athletes, then
x=3, and so the number of musicians = 3 × 3 = 9 ≠ 12. Therefore, the option (C) is not correct.
Number of musicians = 3x = 3 × x = 3 × number of athletes.
Thus, the correct option is (D) The number of musicians is 3 times the number of athletes.
W=a/9
A=
The number of ants after 60 days is 240.
An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
The population of ants doubles every 20 days.
Current number of ants = 30
Now,
The number of ants after 20 days.
= 30 x 2
= 60
The number of ants after 40 days.
= 60 x 2
= 120
The number of ants after 60 days.
= 120 x 2
= 240
Thus,
The number of ants is 240.
Learn more about expressions here:
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