3 years ago

HELP PLZ!! The price of a radio was discounted 20% on the first day of a sale. The sale

Mathematics

2 answers:

Volgvan3 years ago

5 0

Answer:

first day =64%

the second day = 36%

Kisachek [45]3 years ago

3 0

Answer:

combined discount is 40%

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rewona [7]

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3 years ago

A circle has its center at (0,0) and passes through the point (0,9). What is the standard equation of the circle?

Alexxandr [17]

Answer:

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Step-by-step explanation:

The standard equation of a circle is:

$(x-h)^2+(y-k)^2=r^2$

Where the center of a circle is (h,k) and r is the radius of the circle. In this case because a circle is equidistant from the center and we have a point where it passes through 9 that means that the radius is 9. However, since the standard equation states that we must write r in the form of $r^2$ this means that $r^2=9^2$ . Therefore by plugging in the values we have: