All categories

4 years ago

-4b - 5 + 2b =10. Can I have some help solving this.

Mathematics

2 answers:

kirill115 [55]4 years ago

7 0

Answer:

-7.5

Step-by-step explanation:

-4*- 7.5 =30

2*-7.5= -15

30-5-15=10

kramer4 years ago

5 0

Answer:

-7.5

Step-by-step explanation:

Simplify

-4b - 5 + 2b = 10

-2b - 5 = 10

-2b = 15

b = -7.5

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3 years ago

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the speed of a stream is 4mph. If a boat travels 92 miles downstream in the same time that it takes to travel 46 miles upstream,

Elanso [62]

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12 miles per hour

Step-by-step explanation:

Let speed of boat in still water be "x"

and speed of current be "c"

So, downstream rate would be "x + c"

And, upstream rate would be "x - c"

Now, given c = 4

We can use the distance formula, D = RT, where

D is distance, R is rate, and T is time

to solve this.

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Equate:

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Now, cross multiply and solve for x to get our answer:

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Speed of Boat (in still water) = 12 mph

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