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.
(x + 4) and (x – 4)
(x + 3) and (x – 4)
(x + 4) and (x – 1)
(x + 3) and (x – 1)
The quadratic trinomial can be factor using the following formula:
.
1. For the quadratic trinomial find the roots:
.
2. The factoring form of trinomial is
.
3. The factors are x+4 and x-1
Answer: correct choice is C.
Answer:
Always true
Step-by-step explanation:
Here, we want to evaluate if the given statement is true
The discriminant D can be calculated using the formula;
b^2 - 4ac
if D is greater than 0, then we will have only real roots
In a case where a and c are of opposite signs;
then -4ac will always give a positive value which can be added to b^2
This positive value will ensure that D is greater than zero and hence we can have only real roots
So this assertion is always true if a and c are of opposite signs
What is the value for x?
The value of x for the expression -4x - 5 + 2x = -11 is 3.
An equation is a mathematical statement that is made up of two expressions connected by an equal sign.
Example:
-4x - 5 + 2x = -11 is an equation.
We have,
-4x - 5 + 2x = -11
Combine like terms.
-2x - 5 = -11
Add 5 on both sides.
-2x = -11 + 5
-2x = -6
Divide both sides by -2.
x = 3
Thus,
The value of x is 3.
Learn more about equations here:
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Answer:
x = 3
Step-by-step explanation:
-4x - 5 + 2x = -11
add 5 to both sides and cancel the -5 on the left
-4x + 2x = -6
combine -4x and 2x
-2x = -6
divide both sides by -2 and cancel the -2 on the left
x = 3
12 cm
4 cm
Find the volume.