Answer:
5X - 10
Step-by-step explanation:
Sarah had X
Then, Rachael had 4X
And, Addie had X - 10
Total dollar = X + 4X + X - 10
= 5X - 10
Answer:
Her cousin used Yard to measure the wall.
Step-by-step explanation:
Firdaus measured the length of the wall and got 9 feet.
Her cousin measured the same distance and said that it was 3.
To find the answer, we have to use division.
Let "x" the divisor which divide 9 and gives the answer 3.
9 ÷ x = 3
3x = 9
To find x (divisor) we need to divide both sides by 3, we get
3x ÷ 3 = 9 ÷ 3
x = 3
So 1 unit cousin's measure = 3 feet Firdaus measure
We know that 1 yard = 3 feet.
Therefore, her cousin used Yard measure to measure the wall.
The first step to solve this problem is to represent
variables for the width and the length:
Let w = width of the rectangle
2w – 1 = length
of the rectangle
The formula to compute for the area of the rectangle is:
A = LW
Substituting the values and variables to the formula:
28 = w (2w – 1)
2w^2 – w = 28
2w^2 – w – 28 = 0
Solve the quadratic equation:
(2w + 7)(w – 4) = 0
w = -7/2 or w = 4
You cannot use the -7/2 because there is no negative
measurement.
W = 4 feet
L = 2(4) – 1 = 7 feet
Therefore the dimension of the rectangle is 4 feet by 7
feet.
