The best estimate would be 2,000 but, the original answer is 2,023
Answer:
multiply the first equation by -2, then add them
Step-by-step explanation:
7x+4y=-4 *-2 7x+4y=-4 *-2 = -14x-8y=8
5x+8y=28
-14x-8y=8 x=-4, y=6
-9x=36
x=-4
7(-4)+4y=-4
-28+4y=-4
4y=24
y=6
Perimeter = 2(L + W)
2(L + 10) = 50
2L + 20 = 50
2L = 30, L = 15
Solution: the length is 15 inches
75, 73, 76, 78, 79, 78, 79, 81, 80, 82, 81, 84 what is the mean
Ugo [173]
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Answer:
3 metres
Step-by-step explanation:
If y= distance (in meters) from the finish line
x= time in seconds after the beginning of the leg of relay race.
At x=0, when the race has not started,
From the runner's equation
y+4(0)=100
y=100 metres
Also, from his opponent's equation
y+3.8x=97
y+(3.8X0)=97
y=97
The distance needed by the runner to catch up to his opponent
= 100-97 =3 metres
