9514 1404 393
Answer:
13 cm wide; 15 cm long
Step-by-step explanation:
Let w represent the original width. Then the original length is (w+2) and the original area is w(w+2). After the decrease, the width is (w-1) and the length is (w+1). The decreased area is (w-1)(w+1). The difference between these areas is 27, so we have ...
w(w+2) -(w-1)(w+1) = 27
w^2 +2w -(w^2 -1) = 27
2w +1 = 27
w = (27-1)/2 = 13
The original piece of cardboard was 13 cm wide and 15 cm long.
So whenever a question says "of" multiply. So 2/9x90= 180/9= 20. 1/6x90= 90/6= 15. 90-(20+15)=90-35=55.
55 of the books are romance novels. (or 11/18)
Hope this helps!
<span>7t +12
Substitute 9 for t
7(9)+12
Multiply 7 by 9
63+12
Add
Final Answer: 75</span>
Answer:
216 ft^2
Step-by-step explanation:
area of a triangle: (height * base)/2
in this problem,
height = 12, base = 36
area = 12*36/2 = 6*36 = 216
216 ft^2
Answer:
x = 0, 1, -4
Step-by-step explanation:
You can look at the graph where the equation intersects the x-axis.
