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irinina [24]
2 years ago
9

19 less than 3 times a number is 8 more than half of the number. An equation is

Mathematics
1 answer:
AveGali [126]2 years ago
5 0
52
your welcome really easy
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In a sample of 120 randomly selected people in City A, 5% prefer eating salad after the main course. In a sample of 120 randomly
Alex777 [14]

Answer:

There is no enough evidence that the proportions are different.

Step-by-step explanation:

We have to perform a hypothesis test on the difference of proportions.

In this case, the sample size is equal.

The null and alternative hypothesis are

H_0: \pi_1=\pi_2\\\\ H_1: \pi_1\neq\pi_2

The significance level is assumed to be 0.05.

The weighted average p, as the sample sizes are the same, is the average of both proportions:

p=\frac{p_1+p_2}{2} =\frac{0.05+0.08}{2}=0.065

The standard deviation is

s=\sqrt{\frac{2p(1-p)}{n} } =\sqrt{\frac{2*0.065(1-0.065)}{120}} =0.032

The z-value for this sample is:

z=\frac{p_1-p_2}{s} =\frac{0.05-0.08}{0.032} =-0.9375

The P-value for z=-0.9375 is P=0.3485.

The P-value (0.35) is greater than the significance level (0.05), so the null hypothesis is failed to reject.

There is no enough evidence that the proportions are different.

3 0
4 years ago
Find the distance between (6, -2) and (1, -2).
Scilla [17]

Answer:

it is 5 units

Step-by-step explanation:

All you have to do for this one is subtract 6-1 which equal 5 units. This only works in this one because is says at the end -2 on both the numbers.

8 0
3 years ago
If I use the Quotient of Powers Property to simplify this expression, I should ( add, subtract, multiply, divide) the exponents.
Makovka662 [10]
7^8 / 7^6 = 7^2 = 49
The formula is [a^m / a^n = a^m-n]
I hope this helped :)
7 0
3 years ago
Does anyone know how to do part b?
Sergeeva-Olga [200]

Answer:

No

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Step-by-step explanation:

8 0
3 years ago
PLSSS HELP IF YOU TURLY KNOW THISS
Eduardwww [97]

Answer:

Step-by-step explanation:

3² * 5³ = 3*3 * 5*5*5

          = 9 * 125

           = 1125

8 0
3 years ago
Read 2 more answers
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