Worth 50 ! the equation a = r() gives the area a of a circle, where r is the radius and c is the circumference. solve the equation for c.

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Missouri has a shape that is similar to a trapezoid with bases of about 198 miles and 276 miles and a height of about 270 miles. what is the area of missouri in square miles? explain how you found the answer.

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80