Math

5.Jack participated in a 6 day bike marathon of 430 kilometers. He biked 90 kilometers on each of the first 4 days and y kilometers on the fifth day. Which equation can be used to find b, the number of kilometers Jack biked on the sixth day?
A.b=430-90+(4xy)
B.b=430-4+(90xy)
C.b=430-(90x4)-y
D.b=430-(90xy)-4
C

6.Which statement about polygons is false?
A.If all the angles of a triangle are congruent then the measure of each angle is 90 degrees
B.If a traingle has a right angle then both of the other angles are acute
C.If a figure is a rectangle then the sum of the measures of 4 angles is 360 degrees
D.If a quadrilateral has exactly 2 obtuse angles then each of the other angles is an acute angle
A

The circumference of a circular garden is 40 feet. Which expression best represents the radius of the garden?
A.40/pi
B.40xpi
C.40/2pi
D.40x2pi
pi=3
C

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1. All are right.

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