3 years ago

Work out the value of 3 to the power of minus 2 give your answer as a fraction

Mathematics

1 answer:

aivan3 [116]3 years ago

8 0

Your answer is 3 because all you do is form it in a fraction

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A rectangular garden is 8 metres longer than it is wide. if its area is 240m2 , how many metres is the width (ie. the shortest s

Snezhnost [94]

Area of a rectangle is length by width, width is x, length is x+8
x×(x+8)=240
x²+8x=240
x²+8x-240=0
Use the quadratic formula to solve
$x=\frac{-b±\sqrt{b^{2}-4ac}}{2a}
x=\frac{-8±\sqrt{8^{2}-4(1)(-240)}}{2(1)}
x=\frac{-8±\sqrt{64-4(-240)}}{2}$ $x=\frac{-8±\sqrt{1024}}{2}
x=\frac{-8±32}{2}
x=\frac{24}{2} OR \frac{-40}{2}
x=12 OR -20$
It is a distance so can't be negative, so the answer must be 12

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3 years ago

Help with these questions 20 points if answered

fomenos

Answer:

200 cans

Step-by-step explanation:

8 cans x 5 cans = 40 cans on the base

5 layers of 40 cans=5 x 40 = 200 cans total

6 0

3 years ago

Bernard is training for a race . He performs the same exercise routine every day. In a 7 day week does Bernard spend more time w