Answer
Step-by-step explanation:
When you are substituting equations, all you are doing is plugging in variables. Lets do an example..something random but easy...
y = 2x - 3
4x + 2y = 10
So since 2x + 3 equals y we are going to plug in those numbers into the second equation.
4x + 2(2x - 3) = 10
Now we distribute
4x + 4x - 6 = 10
Combine like terms.
8x - 6 = 10
Add 6 to both sides.
8x = 16
Divide.
x = 2
And thats how you substitute equations.
I hope this helps love! :)
Answer:
the right answer is one solution
Answer:
"statement 1: The number of boys at the school is
of the number of girls." is true.
Step-by-step explanation:
Given:
Ratio of Number of boys to the number of girls = 4 : 5
Total number of students = 270
To find:
Number of boys in terms of number of girls = ?
Solution:
As per given statement,
Let, Number of boys = 
Let, Number of girls = 
Total number of students = Number of boys + Number of girls = 270

Therefore, number of boys = 4
30 = 120
And, number of girls = 5
30 = 150
As per Statement 1:
Finding
of the number of girls:
= Number of boys.
Finding
of the total number of students:
= Number of boys.
Number of boys is equal to
of total number of students.
So, "statement 1: The number of boys at the school is
of the number of girls." is true.
Answer:
Option B
Step-by-step explanation:
x^3
Coefficient = 1
Option B