Mathematics: 50 points! one algebra 2 question! (must show work) julia ran and bikes for a total of 40 miles in 5.8 hours. her average running speed was 5.5 mph. her average biking speed was 13.5 mph. let x = total hours julia ran ley y = total hours julia biked use substitution to solve for x and y. show all work. round answers to the nearest tenth. a) how many hours did julia run? b) how many hours did julia bike?

50 points! one algebra 2 question! (must show work)

amayax77

30.09.2020

5.5x+13.5y=40
x+y=5.8

x=5.8-y
5.5(5.8-y)+13.5y=40
31.9-5.5y+13.5y=40
8y=8.1
y=1.0125 or about 1.0 hours
x=4.7875 or about 4.8 hours

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charlesmb7985

25.06.2022

B: -2

Step-by-step explanation:

The reference angle for 4th-quadrant angle 330° is 30°. The sine is negative in the 4th quadrant, so ...

csc(330°) = 1/sin(-30°) = -1/sin(30°) = -1/(1/2) = -2

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