Answer:
There are 25 students in the class.
Step-by-step explanation:
Since we know the percentage of students who want an ice cream party is 20%, and 5 students want an ice cream party, we know that:
, where S is the total amount of students. We can then solve for S:
Given equation
Multiply by S
Divide by 0.2
Therefore, there are 25 students in the class.
1) n(6;1;-1)=n(A;B;C), point A(2;9;4)=A(x₀;y₀;z₀);
2) common view for a plane according the conditions is: A(x-x₀)+B(y-y₀)+C(z-z₀)=0;
3) after substituted coordinates: 6(x-2)+(y-9)-(z-4)=0; ⇒ 6x+y-z-17=0.
Answer:
3 rounds
Step-by-step explanation:
Variable x = number of rounds
2x + 13 = 3x + 10
13 = x + 10
3 = x
Answer:
x = 19
Step-by-step explanation:
x = the number
The words translate into algebra as
4x + 25 = 6x - 13
Solve for x.
25 + 13 = 6x - 4x
38 = 2x
x = 19