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PIT_PIT [208]
3 years ago
12

Solve by factoring please help this is timed :(

Mathematics
2 answers:
Naddik [55]3 years ago
8 0

Answer: X1= 4, X2= 7

Step-by-step explanation:

sdas [7]3 years ago
4 0
You find values of 28 that add to -11! in this case thats -7 and -4. after that just plug in (x-7)(x-4)=0 so: x=4, x=7
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(1) Kareem pumped 28 gallons of water in her pool.This was done over a period of 4 minutes at a constant rate. What was the chan
oksian1 [2.3K]

Answer:

7 Gallons of water get pumped into the pool every minute.

Step-by-step explanation:

28 Divided by 4= 7 so it is 7 gallons per min.

6 0
3 years ago
The perimeter of a square varies directly with the length of one side. what is an equation that relates the perimeter p and leng
PilotLPTM [1.2K]
P=KL where K is the constant of variation
4 0
3 years ago
LOOK AT PICTURE, WHOEVER HAS CORRECT ANSWER, I WILL MARK BRAINIEST :)
Sauron [17]

Answer:

b

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
In a large population, 82% of the households have cable tv. A simple random sample of 225 households is to be contacted and the
anzhelika [568]

Answer:

The mean of the sampling distribution of the sample proportions is 0.82 and the standard deviation is 0.0256.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For proportions, the mean is \mu = p and the standard deviation is s = \sqrt{\frac{p(1-p)}{n}}

In this problem, we have that:

p = 0.82, n = 225.

So

\mu = 0.82

s = \sqrt{\frac{p(1-p)}{n}} = \sqrt{\frac{0.82*0.18}{225}} = 0.0256

The mean of the sampling distribution of the sample proportions is 0.82 and the standard deviation is 0.0256.

7 0
3 years ago
Read 2 more answers
2(x + 4) − 1 = 2x + 7
Margarita [4]

Answer:

All real numbers are solutions to this problem.

Step-by-step explanation:

I) Simplify:

2(x + 4) - 1 = 2x + 7

x + 4 - 0.5 = x + 3.5 (Divide by 2)

x + 3.5 = x + 3.5 (Simplify <em>x + 4 - 0.5</em>)

x = x

II) Conclusion:

Any real number will work as a solution.

7 0
3 years ago
Read 2 more answers
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