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4 years ago

PLEASE HELP ME! WILL MARK BRAINLIEST!! :D

Mathematics

1 answer:

Anvisha [2.4K]4 years ago

5 0

Answer:

this wont work

Step-by-step explanation:

kidding will type awnser shortly

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a boat takes 8 hours to go 6 miles upstream and come back to the starting point. if the speed of the boat is 4 miles per hour in

Romashka-Z-Leto [24]

Consider this option:
1. if to re-write the condition, it is given: total time t=8 hours; upstream=downstream=6 miles; V_boat=4 m/h., V_current=V=?
2. note, that total time=time_upstream+time_downstream, where time_upstream=6miles/(V_boat-V) and time_downstream=6miles/(V_boat+V). Using this it is possible to make up and solve the following equation:
$\frac{6}{4+V} + \frac{6}{4-V} =8; \ =\ \textgreater \ \ \frac{V^2-10}{16-V^2}=0; \ =\ \textgreater \ \ V=\sqrt{10} \ \frac{miles}{hour}$

answer: √10

P.S. the roots of the equation are √10 and (-√10), only positive values is needed for V.

7 0

3 years ago

PLEASE HELP 15 POINTS...PLEASE HELP

sasho [114]

Answer:

-4

Step-by-step explanation: it is intercepting the -4 so i think -4 is the right answer

8 0

3 years ago

Read 2 more answers

What is 2,345 rounded to the nearest 10

ser-zykov [4K]

2,350 Hope this helped

8 0

4 years ago

Read 2 more answers

Match the two numbers with their least common multiple (LCM).

timurjin [86]

Answer:

8 and 4: A
8 and 6: C
8 and 10: B

Step-by-step explanation:

8 and 4:

Multiples of 8: 8, 16, 24

Multiples of 4: 4, 8, 12, 16

8 and 6:

Multiples of 8: 8, 16, 24

Multiples of 6: 6, 12, 18, 24

8 and 10:

Multiples of 8: 8, 16, 24, 32, 40

Multiples of 10: 10, 20, 30, 40

4 0

3 years ago

Ellie, an office manager, needs to find a courier to deliver a package. The first courier she is considering charges a fee of $1

Ber [7]

Answer:

The weight of the package is 1 kilograms.

It will cost $ 13 by both the couriers services.

Step-by-step explanation:

Let the weight of her package is x kilograms

Now, according to the question:

The charges of first Courier = $10 + $3(x)

and The charges of Second Courier = $7 + $6(x)

Also, for x kilograms, both the charges are equal

⇒ $10 + $3(x) = $7 + $6(x)

or, 10 + 3x = 7 + 6x

or, 10 -7 = 6x - 3x

⇒ 3x = 3, implies x = 3/3 = 1

⇒ The weight of the package is 1 kilograms.

It will cost : 10 + 3(1) = $ 13 = 7 + 6(1) by both the couriers services.

5 0

4 years ago