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Daniel [21]
3 years ago
6

2b-3/b-2 = 3b/b+2 ... Solutions by cross multiplying

Mathematics
1 answer:
Rzqust [24]3 years ago
5 0

Step-by-step explanation:

(2b-3)/(b-2)(b+2) = 3b(b-2)/(b+2)(b-2)

2b²+4b-3b-6/b²-4=3b²-6b/b²-4

2b²+b- 6= 3b²-6b

move square to square unknown to unknown

-b²+7b-6/b²-4

i also dk this is true or false

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Can someone please help me​
4vir4ik [10]

Answer:

40

Step-by-step explanation:

Two ways we can solve this problem:

1. Graphically

2. Mathematically

Because you already solved it graphically, I will show you how to do so mathematically. Of course, graphically is much much easier and more efficient in this problem.

Let's break the problem down.

First, we are given a graph which contains a slope.

To find slope, we use the technique -> rise/run

Picking 2 obvious points from the graph, we can see

1st point -> (10, 20)

2nd point -> (40, 80)

Now, let's find the slope

\frac{80-20}{40-10}  = \frac{60}{30}  = 2

Now, we have an equation y = 2x, where y = number of pies and x = cups of sugar

We want to find how many cups of sugar we need to bake 80 pies. Simply substitute 80 = number of pies = y

y = 2x -> 80 = 2x

Solving for x, divide both sides by 2

40 = x

We need 40 cups of sugar.

3 0
2 years ago
Find the factors that multiply to give you -42 and add to give you -1.
Schach [20]
-7 and positive 6. if you multiply a negative by a positive it will always be a negative.
3 0
3 years ago
Keiko started a race at 6:44 PM and finished it at 7:13 PM.
KiRa [710]

Answer

29 minutes

Step-by-step explanation:

5 0
3 years ago
Which doesnt belong, and why? 9, 16, 25, 43
Tomtit [17]

Answer:

43

Step-by-step explanation:

The first three numbers are perfect squares:

9 = 3²

16 = 4²

25 = 5²

43 is not a perfect square.

3 0
3 years ago
Read 2 more answers
I need help with 1 and 3 please
schepotkina [342]
For #1
city A's mean would be 10.5, then you would divide it by the number of numbers there is which is 5,So 10.5/5 is 2.1

city B's mean would be 11.6  then you would divide it by the number of numbers there is which is 5, So 11.6/5 is 2.32.

thats all I have don't know how to do #3 sorry 
4 0
3 years ago
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