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wariber [46]
3 years ago
15

A boat travels 60 km upstream

Mathematics
1 answer:
trapecia [35]3 years ago
3 0

Answer:

16 km/h   ….. still water boat rate

4 km/h   …. Current rate

Step-by-step explanation:

The speed of the boat supposed to be x km/h

The current rate is y km/h

(x + Y) * 3 = 60

(x – y) * 5 = 60

3x + 3y =60 ….. ①

5x – 5y = 60 ….. ②

① * 5 … 15x + 15y = 300   … ①’

② * 3 … 15x – 15y = 180   … ②’

①’- ②’ … 30y = 120

Y = 4 km/h   …. Current rate

15x = 300 – 15*4 = 240

X = 16 km/h   ….. still water boat rate

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yan [13]

Answer:

The correct option is;

line a and line b

Step-by-step explanation:

Lina a passes through (-1, 0) and (1, 2)

Line b passes through (2, 2) and (-1, -1)

Line c passes through (0, 3) and (1, 0)

Line d passes through y = 1

An equation that has no solution

By examination, from the plot of the coordinates using an online tool, the system that would have no solution is the system of line a and line b because they are parallel lines and cannot meet or have a point where there is a common solution, therefore, there are no solutions when the equations of the two lines are combined in one equation

Slope of line a = -2/-2 = 1

Slope of line b = 3/3 = 1

The slopes of lines a and b are equal, therefore, line a and line b are parallel.

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3 years ago
Assuming there’s is a proportional relationship which additional set of values could be included in the table
schepotkina [342]

Answer:

I don't know

Step-by-step explanation:I need the answer

5 0
3 years ago
Read 2 more answers
when asked to write a point slope equation for a line passing through the points (-3,-5) and (2,4) a student wrote y-4=-9/5(x-2)
Eduardwww [97]
(-3,-5)(2,4)
slope(m) = (4 - (-5) / (2 - (-3) = (4 + 5) / (2 + 3) = 9/5

y - y1 = m(x - x1)
slope(m) = 9/5
(2,4)...x1 = 2 and y1 = 4
sub
y - 4 = 9/5(x - 1)....this is the correct answer

the student figured the slope wrong....it is 9/5...not -9/5
5 0
3 years ago
Help me please I'm very confused about this!
Colt1911 [192]

Answer:I think it's trying to find the area of which is a 5 times 2 = 10

Step-by-step explanation:

6 0
3 years ago
The rectangular field has a perimeter of 98 meters. The width of the perimeter is three times as much as five times the length.
White raven [17]

Answer:

a) x = 3.0625m

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b) A = 140.68359375 m²

Step-by-step explanation:

Let x be the length

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x + y = 49

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y = 15x

x + 15x = 49

16x = 49

x = 3.0625 m

y = 15(3.0625) = 45.9375

A = xy = 3.0625(45.9375) = 140.68359375

4 0
3 years ago
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