Step-by-step explanation:
5ab + 8c
Putting values of a = 3 b = 2 and c = 9
5(3)(2) + 8(9)
30 + 72
102
Answer:
D. w = l − 40; the width increases as the length decreases
Step-by-step explanation:
The formula for the perimeter of a rectangle =
P = 2l + 2w
Where to find the Width, we make w the subject of the formula.
Hence:
P - 2l = 2w
w = P - 2l/2
From the question, P = 80
Hence,
w = 80 - 2l/2
w = 80/2 - 2l/2
w = 40 - l
The width of a rectangle is always the longer side ,hence:
D. w = l − 40; the width increases as the length decreases
Answer:
Step-by-step explanation:
rational number
Kai had a gross weekly paycheck of 616 dollars last week.
He worked 6 hours for 4 days = that's equals to 6 * 4 = 24 hours
And 8 hours for 1 day.
=> 24 + 8 = 32 hours for 1 week
=> 616 dollars / 32 hours = 19.25 dollars is his hourly rate.
Answer:
Step-by-step explanation:
Consider the figure as the difference of a trapezoid and a rectangle.
<u>Area of the trapezoid:</u>
- a = 3 - (-2) = 5 units
- b = 9 - (-6) = 15 units
- h = 5 - (-5) = 10 units
- A = (a + b)h/2 = (5 + 15)(10)/2 = 100 square units
<u>Area of the rectangle:</u>
- l = 5 - (-2) = 7 units
- w = -1 - (-5) = 4 units
- A = lw = 4*7 = 28 square units
<u>Area of the figure:</u>
- 100 - 28 = 72 square units