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bazaltina [42]
3 years ago
12

Solve for x by factoring. Check your answers. Can you check to see if I'm correct?

Mathematics
1 answer:
Studentka2010 [4]3 years ago
7 0
If you want to check if your answer is correct, expanding it all out will help!

(x-6)(x+2)=0 <-- Use FOIL tactic 

x²+2x-6x-12=0

x²-4x-12=0 

As you can see, this is identical to the initial equation given. The x values would be 6 and -2, as seen from the factored equation. 

Hope I helped :) 
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A boat takes 4 hours to go 20 miles upstream. It can go 32 miles downstream in the same time. Find the rate of the current and t
KonstantinChe [14]
Let the boat speed in still water be b.
Let the current speed be c.
The speed going upstream is 20/4 = 5 mph.
The speed going downstream is 32/4 = 8 mph.
b - c = 5 ........(1)
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Adding equations (1) and (2) we get:
2b = 13
b = 13/2 = 6.5
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4 0
2 years ago
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Tatiana [17]

Answer:

24

Step-by-step explanation:

-3x(4x-2)

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3 0
2 years ago
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Suppose Burger King has run a major advertising campaign in the hopes of increasing monthly sales. To investigate the effectiven
Alexxandr [17]

Answer:

The right answer is:

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Step-by-step explanation:

The claim that want to be tested is that the sales were significantly increased after the commercial, indicanting that the advertisement campaign was effective.

This claim is usually expressed in the alternative hypothesis as it has to have enough evidence to prove that it is true.

Then, the alternative hypothesis H1 should state that the difference (sales after - sales before) is higher than 0.

The null hypothesis would state that the difference is not significantly different from 0, or, in other words, that the sales are the same before and after and that the variation is due to pure chance.

Then, the null hypothesis H0 would state that the difference is equal to 0.

The right answer is:

a.H0: μd = 0; H1: μd > 0

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3 years ago
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Answer:

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elixir [45]
Im guessing that it is 5 but then again dont trust me XD

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