Answer:
C. $114
Step-by-step explanation:
Take the cost per mile times the miles traveled.
0.19 x 600 Multiply
114
2(2x) + 1x = 40 or 4x + 1x = 40 is the result of combining by substitution
<em><u>Solution:</u></em>
Given that we have to combine 2y + 1x = 40 and y = 2x using substitution method
The substitution method for solving systems of equations involves expressing one variable in terms of another, thus removing one variable from an equation.
<em><u>Given equations are:</u></em>
2y + 1x = 40 -------- eqn 1
y = 2x ----------- eqn 2
We can substitute eqn 2 in eqn 1
Which means, substitute y = 2x in place of y in eqn 1
2(2x) + 1x = 40
4x + 1x = 40
5x = 40
x = 8
From eqn 2,
y = 2(8)
y = 16
Thus by combining using substitution method we found the solution
Answer:
The quantity of board which Mr. Stevens need to buy is 22.4 meters
Step-by-step explanation:
Given as :
The length of board = 6.9 meters
The width of board = 4.3 meters
Let The measure of new board = x meter
Now,
The measure of new board = The perimeter of board
∵ The board is of rectangle figure
As, The perimeter of rectangular board = 2 × Length + 2 × width
So, The measure of new board = 2 × Length + 2 × width
or, x = 2 × 6.9 + 2 × 4.3
or, x = 13.8 + 8.6
or, x = 22.4 meters
So, The measure of new board = x = 22.4 meters
Hence The quantity of board which Mr. Stevens need to buy is 22.4 meters Answer
Let the original number be x
X^2 + 11 = 36
Subtract 11
X^2 = 25
Square root both
X = 5
Solution: her original number is 5
