Answer:
9
Step-by-step explanation:
First side: (2+3)=5
Second side: (5-2)=3
Perimeter: (12+5)=17
Take perimeter and minus the first and second side
17-5-3=9//
No. You can only add variables that have the same exponents. Also, during addition of variables with the exponent, you do not add the exponents.
Answer:
$63
Step-by-step explanation:
<em>I believe you meant Richard worked for 7 </em><em>hours</em> and made $9 per hour.
In order to know how much Richard earned for 7 hours, you have to <u><em>multiply Richard's salary rate with his number of working hours.</em></u>
- 7 hours x 9 dollars/hour = $63
Therefore, Richard earned $63 for his 7-hour work.
<u>Additional Information</u>
Another example is: if Richard worked for 10 hours, you just have to multiply his salary rate again to his number of working hours.
- 10 hours x 9 dollars/hour = $90
Answer:
Area = 84 in²
Step-by-step explanation:
In order to find the area of the rectangle, you need to first set up an equation to find the length based on the information already given in the problem. Since the perimeter = 40 and the formula to find perimeter of a rectangle is: P = 2W + 2L, where W = width and L=Length, we can solve for 'L' by putting in the values given:
P = 2W + 2L or 40 = 2W + 2(3W - 4)
The length of the rectangle is '4 less than 3 times the width'. This can be written as the expression '3W - 4'.
Distribute: 40 = 2W + 2(3W - 4) or 40 = 2W + 6W - 8
Combine like terms: 40 = 8W - 8
Add '8' to both sides: 40 + 8 = 8W - 8 + 8 or 48 = 8W
Divide both sides by '8': 48/8 = 8W/8 or 6 = W
Solve for L: 3W - 4 or 3(6) - 4 = 18 - 4 = 14
Since L=14 and W = 6, we can solve for Area using the formula: A = LxW or A = (14)(16) = 84in².
