An equation of a circle is: x2 + y2 – 10x + 20y - 16 =
What is its center?
What is its radius?

answer: 2x + 2 − 2 = 10 − 2; subtraction property of equality

step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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step-by-step explanation:

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour