Answer two questions about Systems AAA and BBB: System AAA \text{\quad}start text, end text System BBB \begin{cases}x+3y=-9\\\\2
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Answer:
See explanation
Step-by-step explanation:
The distibutive property states that for all real numbers a, b and c
Draw a rectangle with length of (a+b) units and width of c units. The area of this rectangle is
Divide this rectangle into two rectangles: first rectangle with the length of a units and the width of c units and the second rectangle with the length of b units and the width of c units. The area of these rectangles are
These two rectangles together form initial rectangle, so the sum of the area of two smaller rectangles is the area of the bigger rectangle.
<h2>Plane's speed without wind i s 117.68 mph</h2>
Step-by-step explanation:
We have speed of plane without wind is x.
Distance to brothers place = 200 miles.
A headwind of 20 mph slowed down the plane's speed on the first leg of the trip
Speed to brothers place = x - 20
We have
Distance = Speed x Time
A tailwind of 20 mph sped up the plane on the return trip
Speed of return trip = x + 20
We have
Distance = Speed x Time
The entire trip took 3.5 hours.
That is
Plane's speed without wind i s 117.68 mph