Trish's resting heart rate is 50 beats per minute. For every minute she exercises, her heart rate increases 5 beats per minute.
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<h2><em><u>Ans</u></em><em><u>wer</u></em><em><u>:</u></em></h2>
Let m<6 be X
140° + X = 180°
X = 180° - 140°
X =40°