crybaby222psyc
16.09.2019 •
Mathematics
Hi! can anyone answer these five questions ? (with some workings)
1. jim walks 3 miles in 51 minutes. how long would it take him to walk 2 miles?
2. in 7 hours carla can earn £52.50. how much can she earn in 4 hours?
3. a car uses 9 litres of petrol to travel 126 km. how far will it travel on 5 litres of petrol?
4. a watch loses 90 seconds in 15 hours. how much will it lose in 7 hours?
5. £450 can be exchanged for $630. how many dollars would you get for £290?
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Ответ:
3miles= 51 mins
(Divide by 3)
1mile = 17 mins
(Multiply by 2)
2miles = 34 mins
Ответ:
2.30 because 52.50÷ 7=7.5 And 7.5×4=30
3. 70 because 126÷9= 14 and 14×5=70
4.42 because 90÷15=6 and 6×7=42
5. 406
Ответ:
9514 1404 393
y = -3x
Step-by-step explanation:
The slope formula gives the slope of the segment between the given points.
m = (y2 -y1)/(x2 -x1)
m = (-3 -(-5))/(2 -(-4)) = 2/6 = 1/3
The slope of the perpendicular line is the opposite reciprocal of this, so is ...
m' = -1/(1/3) = -3
A perpendicular line is ...
y = -3x