Answer:
y is the variable in that expression.
<span>0.3278
Use combination formula ((20C4)*(15C3))/(35C7) = 0.3278
20C4 - combinations of 4 females from 20
15C3 - combinations of 3 males from 15
35C7 - all possible combinations of 7 students from 35 students in total</span>
Answer:
Use y + x = 3 and solve for either x or y.
Step-by-step explanation:
Substitution is a method to solve a system of equations by substituting an expression from one equation into the other.
To begin, first solve one equation by isolating for one variable. Choose the equation which will have the least number of steps to do so.
y + x = 3 can be solve for x or y by subtracting the other variable. Since this only requires one step use this equation. Either variable can be used.
Answer:
2x+3+5x+6 = 7x+9
Step-by-step explanation:
2x + 3 + 5x + 6
= 2x + 5x + 3 + 6
= 7x + 9
Hope it helps