Mrs Jermaine, the Headteacher, lives
in a nearby town and drives 20 miles to
School in the morning.
on Monday her journey takes 20
minutes.
on Tuesday har average speed for the
journey to school is 60 kilometres per
hour
pid Mrs Jermaine drive more quickly to
school on Monday or Tuesday?

you'll just earn points here

step-by-step explanation:

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92

93-8=85

855=17

17*4=68

there are 68 purple marbles in that bag