If a = –3.7, what is the value of –a? A. 3.7 B. 3 C. –3.7 D. –3
1 answer:
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Let the side of one edge of tile = a cm.
So area of tile = (side)^2 =
But area of tiles = 900 square centimeter.
So
So side of one edge of tile is = 30 cm
So area of tile = (side)^2 =
But area of tiles = 900 square centimeter.
So
So side of one edge of tile is = 30 cm
The key here is to not worry too much and just follow PEMDAS.
Here we have the expression . Following PEMDAS, we complete the expression inside the parentheses first, or
. This gives us
or just
Hope this helps.
To solve this problem you must apply the proccedure shown below:
1. You have that Jim drove the car 2,718.3 miles for a total mileage of 87,416.
2. Then, to calculate the mileage before last month, you only need to substract the total mileage given in the exercise above and the mileage drove last month, as following:
Therefore, the answer is: 84,697.7 miles.