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3 years ago

Please see attached. Please explain.

Mathematics

1 answer:

Gemiola [76]3 years ago

8 0

Your mom can explain ok stop asking

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On the River current a canoe traveled 30 km in 3 hours and 20 min, against the current the canoe traveled 28 km in 4 hours. how

mihalych1998 [28]

Answer:

12 km

Step-by-step explanation:

Let

x km/h = speed of the canoe on the lake

y km/h = speed of the current

With the current:

Speed = x + y km/h

Distance = 30 km

Time = 3 hours 20 minutes = $3\dfrac{1}{3}$ hours

Thus,

$30=3\dfrac{1}{3}(x+y)\\ \\30=\dfrac{10}{3}(x+y)\\ \\90=10(x+y)\\ \\x+y=9$

Against the current:

Speed = x - y km/h

Distance = 28 km

Time = 4 hours

Thus,

$28=4(x-y)\\ \\x-y=7$

Add these two equations:

$x+y+x-y=9+7\\ \\2x=16\\ \\x=8\ km/h$

On the lake:

Time = 1.5 hours

Speed = 8 km/h

Distance $=8\cdot 1.5=12\ km$

7 0

3 years ago

Ayuda es para ahoritaaa

Tpy6a [65]

Answer:

a) 67

b) 122

c) que angulo

d) 40

Step-by-step explanation:

3 0

3 years ago

Point R is on line segment QS. Given RS = 13 and QS = 20, determine the length of QR

Aleksandr-060686 [28]

Answer:

Length of QR = 7

Step-by-step explanation:

20 - 13 = 7

6 0

3 years ago

Part B

SVEN [57.7K]

Answer:

$500

Step-by-step explanation:

substitute the values for X & S in the equation from part A:

y=20x + 0.15s

x=($20x25) + (0.15x$0)

= $500

3 0

3 years ago

What is the length of ab

Marina86 [1]

Answer:

a,2

Step-by-step explanation:

3×=4×-2

if ×=2

3(2)=4(2)-2

6=8-2

6=6

this is the answer I hope it will help you

8 0

3 years ago