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svp [43]
3 years ago
9

Rowing upstream for 5 mi against a strong current, your speed is 20% less than your normal rowing speed. On the return trip down

stream, your speed is 20% greater than your normal rowing speed. Will you finish the whole trip in the same time as if you had rowed at normal speed throughout? How much longer than usual will your total time be?
Mathematics
1 answer:
spayn [35]3 years ago
3 0

Answer:

it would be the same as rowing normal speed because you loose 20% for 5 mi and gain 20% back for 5 mi

Step-by-step explanation:

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strojnjashka [21]
8x + 2y = 44
5x + 2y = 35

Since 2y is already common, there is no need for multiplication. Just reverse the signs on the equation.

Like this; 

8x + 2y = 44
-5x - 2y = -35

All the additions become subtractions and vice versa.

-2y and +2y get cancelled.

Leaving;

8x = 44
-5x = -35

Now, subtract again. 

8x - 5x = 3x

44 - 35 = 9

So;

3x = 9

x = 9 / 3

x = 3

We found 'x' and now we have to find 'y'.

Just substitute. 

[8 x 3] + 2y = 44

24 + 2y = 44

2y = 44 - 24

2y = 20

y = 20 / 2

y = 10

Now, we re-check;

[8 x 3] + [2 x 10] = 44

24 + 20 = 44

Explaining the error for #9b is simply doing the whole sum. 

Hope this helped! :) I tried my best to explain. 

7 0
3 years ago
Tim​ Urban, owner/manager of​ Urban's Motor Court in Key​ West, is considering outsourcing the daily room cleanup for his motel
pantera1 [17]

Answer:

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Step-by-step explanation:

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7 0
3 years ago
Right now, Simran's father is three times as old as Simran. Five years ago, he was four times as
Illusion [34]
Hello,

Let's f the age of the father
s the age of Simran

f=3*s
f-5=4*(s-5)
==>3s-5=4s-20
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3 0
3 years ago
Read 2 more answers
BRAINLEIST!!!! You have a credit card with a balance of $754.43 at a 13.6% APR. You have $300.00 available each month to save or
Alex
We are given
P = $754.43
r = 13.6% annual

for a.
A = 150
for b.
A = 300

First, change the interest into effective monthly
i = (1 + 0.136/12)^12 - 1
Solve for i

Next, use the general formula
A = P i ( 1 + i)^n / (1 + 1)^n - 1
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6 0
3 years ago
F(x)=−4x ^ 2 +10 {Find }f(-2)
BlackZzzverrR [31]

Answer:

f(-2) = -6

Step-by-step explanation:

<u>Step 1:  Set x to -2 </u>

f(-2) = -4(-2)^2 + 10

f(-2) = -4(4) + 10

f(-2) = -16 + 10

f(-2) = -6

Answer:  f(-2) = -6

3 0
3 years ago
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