Answer:
The perimeter of a playing card is 30 centimeters. The area is 50 square centimeters. What are the dimensions of the playing car
d?
centimeters by
centimeters
centimeters by
centimeters
1 answer:
Step-by-step explanation:
We get two equations here. One for the area and one for the perimeter. The area gives us x×y=50. The perimeter, if we have a rectangle, x+y+x+y=30=2x+2y. For this to work we need to make a simple expression for x or y. Let's go with x here. 2x+2y=30 so x=15-y. if we fill that in the other equation we get (15-y)×y=50 (see picture). y=5 or y=10. If we fill in x×5=50 we get x=10 and vice versa. So the dimensions are 5 centimeters by 10 centimeters
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Hello Trickstwin,
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How are you doing? Referring to your question, of course, we see that the painter paints half a room in half a day. We want to find the base of this operation. So, we have to figure out how many rooms he paints in one full day. If he paint half a room in half a day, he then must paint a room in one whole day. So we know the following:
Which leads on. We multiply that one day by seven, and funny enough:
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Thank you,
Darian D.