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morning. How many minutes did Marcia practice in the morning? in the afternoon?

2006-11-06 13:24:59 · 5 answers · asked by lester w 1 in Science & Mathematics Mathematics

5 answers

x= morning
y = afternoon

x + y = 40 eq.1

y = x - 10
x - y = 10eq.2

add eq.1 and 2

x + y = 40

x - y = 10
________

2x = 50
x = 25

use eq.1 to get value of y
x + y = 40
y = 40 - x
y = 40 - 25
y = 15

she practiced 25 minutes in the morning and 15 in the afternoon

2006-11-06 13:30:57 · answer #1 · answered by kezongputi 2 · 1 0

marcia cheated and recorded and just played some back in the afternoon so she really only practiced for 15 mins in the morning

2006-11-06 13:35:29 · answer #2 · answered by Anonymous · 0 1

As for the mile its self, there's no longer a lot you're able to do to make the time greater suitable. i might advise which you shop a mushy yet, mushy %. on the 1st 2 laps, then start to %. up velocity on the third or 4th lap to make you time greater suitable. you need to have dedication to run a mile swifter than you're use to. preparation for this is a distinctive tale. basically jog the full situation at a %. which you would be able to shop the full mile. Run common, and attempt to take off time each and every run. it relatively is going to basically take 5-10 instructions of working to get under 10 minutes.

2016-10-15 11:22:48 · answer #3 · answered by ? 4 · 0 0

25min. in the morning and 15 min. in the afternoon.

2006-11-06 13:27:46 · answer #4 · answered by Guppie 2 · 0 0

25 minutes in the morning

15 minutes in the evening

Duhhhhhh

2006-11-06 13:27:17 · answer #5 · answered by Aaron 4 · 0 1

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