Joe walked four over nine of a mile in four over five of an hour. What is his unit rate in miles per hour?

1 answer:

8 0

four over nine of a mile in four over five of an hour

= 4 4
----- / ----
9 5

= 4 5
----- * ----
9 4

= 20
-------
36

= 5
-----
9

answer is : four ninths over four fifths = five over nine mile per hour (first choice)

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The width of a golden rectangle is 15 feet. Find the perimeter of the rectangle to the nearest foot.

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Answer:

79 ft

Step-by-step explanation:

Golden rectangle side ratios 1 : (1+sqrt5 )/2

(approx 1: 1.618)

15 + 15 + 2*15*1.618 = ~79 ft

BUT perhaps the 15 is the 1.618 side

15/1.618 + 15/1.618 + 15 + 15 ~ 49 feet

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A ladder is leaning against a brick wall so that the top of the ladder is even with the top of the wall. If you know that the he

ASHA 777 [7]

Answer: the top of the ladder is at 24 feet from the ground

Step-by-step explanation:

Use the Pythagorean theorem to solve for the unknown, since we notice that the ladder is the hypotenuse of a right angle triangle formed by the horizontal distance from the wall to the base of the ladder, and the height of the top of the ladder against the wall. We need to find one of the triangle's sides given its hypotenuse and the other side, so we use the formula: