Answer : option C, 5x2 + 32x − 21
In the rectangle, the length = 5x - 3 and width = x + 7
We know the formula for area of rectangle = length * width
Area of rectangle = (5x-3)(x+7)
WE multiply it using FOIL method
F - First terms, 5x * x = 
O- Outer terms, 5x * 7 = 35x
I - Inner terms, -3 * x= -3x
L - Last terms, -3 * 7 = -21
Now we add all the terms
combine like terms
So area of a rectangle =
Answer:
The answer is 9
Step-by-step explanation:
56+(3x+7)=90 (In the picture it shows a 90 degree angle.)
Then, you can start solving the equation.
90-56=34
3x+7=34 (Subtract by 7)
3x=27 (Divide by 3 on both sides)
x=9
First u need to divide 135 by 0.4 which equals 337.5, So her gross pay is $337.50
Answer:
6.1 gallons of 100% antifreeze and 48.9 gallons of 10% antifreeze
Step-by-step explanation:
Let the amount of 100% antifreeze be x gallon
let the amount of 10% antifreeze be y gallon
total amount to drum = 55 gallons
therefore x + y = 55 -------------------------------Eqn 1
100%(x) + 10(y) = 20%(55)
x + 0.1y = 11--------------------------------------Eqn 2
Both equations are solved simultaneously
From eqn 1 x = 55-y
Substitute x = 55-y into eqn 2
55-y+0.1y = 11
collecting like terms
44 = 0.9y
y = 48.88889
x = 55- 48.88889 = 6.11111 gallons
Therefore 6.1 gallons of 100% antifreeze and 48.9 gallons of 10% antifreeze
