Answer:
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For each pair (x,y) we check 5x-4y and if it's 17 we check YES otherwise NO.
(2,9) 5(2) - 4(9) = 10 - 36 = -26 NO
(-3,-8) 5(-3) - 4(-8) = -15 + 32 = 17 YES
(1,-3) 5(1) - 4(-3) = 5 + 12 = 17 YES
(-6,2) 5(-6) - 4(2) = -30 - 8 = -38 NO
The hour hand makes a full circle of 12 hr, in 45 min=0.75 hours it will will have made 0.75/12 of a full circle. Given that the tip of the hour hand travels along the circumference of a circle, the radius of circle will be equal to the lenth of the hand.
But:
circumference is given by:
C=2*π*radius
The distance traveled by the hand in 12 hours will be:
2**36=76π mm
The distance traveled in 45 min will be:
0.75/12 *72π=4.5π mm
in 45min, the min hand will make 45/60=3/4 of a full circle. If the min hand is 150% of the hour hand, then its length is 150/100*36=54 mm.
Thus the tip of the minute will travel along the entire circuference of a circle with a 54 mm radius, this implies that for a full circle we shall have:
2*π*54mm=108π mm.
Hence;
in 45 min, the tip of the minute hand will have traveled 108*3/4*π=81π mm
Debt Is A Negative Value
Growth Is A Positive Value
Sea Level Is Zero Or No Value
Answer:
area of the BCD triangle=1/2×10×9
=45
area of the ABD triangle=1/2×10×3
=15
Total area=45+15
=60 square centimetres