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exis [7]
4 years ago
13

HELP FOR BRAINIEST AND 50 POINTS

Mathematics
2 answers:
motikmotik4 years ago
7 0
X - speed of the current
40+x - speed with current 
40-x - speed against current

t-time
(40+x)*t=100
(40-x)*t=60

           40t+xt=100
 <span>  +      40t-xt = 60
</span>           80t      =160
                t      = 2

40t+xt=100,   
40*2+2x=100
80+2x=100
2x=100-80
2x=20
x=10 mi/h

10 mi/h speed of the current.


lapo4ka [179]4 years ago
4 0

The answer is x/10mph Hope I helped!

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A man sells 8 articles for Rs. 7360 and makes a profit of
Bogdan [553]

Answer:

SP of 8 articles =Rs 7360

Profit=15%

Now,

SP of each article =7360/8= Rs920

Wkt,

SP=CP+profit (let CP=x)

920=x+15%of CP

920=x+15÷100× x

920=x+15x÷100

920=(100x+15x)÷100

920=115x÷100

92000=115x

92000÷115=x

Therefore, x=Rs 800

CP=800(i.e Cost price of one article)

Again,

SP of 13 articles=Rs 11440

SP of 1 article=11440÷13=Rs 880

Since,SP>CP

Profit!

Profit=SP-CP

=880-800

=Rs 80

Profit%=profit÷CP×100%

=80÷800×100

=10%

4 0
3 years ago
7.suppose you have a 6-sided number cube and a coin. Event A is that you roll the number cube and land on 1, and event B is that
kykrilka [37]
Event A - roll a 6-number cube 
Event B - flip a coin

*Independent events    *not mutually exclusive events

Both events are independent and not mutually exclusive.
Independent event means that one can happen without relying on the outcome of the other one.
Not mutually exclusive event means that both can happen at the same time.  
4 0
3 years ago
Read 2 more answers
Cost for bowling at Blue Oaks bowling alley are $2.50 for shoes and $4.25 for each game bowled. Austin bowled 5 games. what was
yanalaym [24]
2.5 + 4.25x

2.5 + 4.25(5) = 2.5 + 21.25
= 23.75

Hope this help

5 0
4 years ago
Can anyone help me with this question?
Harrizon [31]

Answer: Here you go

Explanation:

Raduis is 2.5cm

Diameter 5cm

Circumference 15.70796cm or 16 rounded up because 2 times pie time 2.5 because 2.5 is the radius which if you calculate is 15.7 because 2 x 3.1415 x 2.5 = 15.7

8 0
3 years ago
Cab A charged $5x + 20 for a ride to the
Svet_ta [14]

Answer:

Cab B charged more

It charged $(30-x) more

Step-by-step explanation:

Here, we want to know which of two cabs charged more for a ride from the airport to the mall.

To know the cab that charged more, we shall be substituting any same value of x in both of the fees

Let’s say x is 10

Thus 5x + 20 becomes 5(10) + 20 = 50 + 20 = 70

while 4x + 50 becomes 4(10) + 50 = 40 + 50 = 90

Clearly we can see that 4x + 50 is greater then 5x + 20, so we can conclude that 4x + 50 is a greater fee

Now since we know the one that’s higher, we can now know the value by which it is higher

That would be (4x + 50)-(5x + 20)

= 4x + 50 -5x -20

= 4x-5x + 50-20

= -x + 30 or simply 30-x

7 0
3 years ago
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