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Nuetrik [128]
4 years ago
9

PLEASE PLEASE HURRY!!!!!!!

Mathematics
1 answer:
zvonat [6]4 years ago
3 0

Answer:x=2 y=3

Step-by-step explanation:

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Mrs. Hart went to get her nails done at the salon. The cost was $35.00. What is the total amount if tax is 6% and she wants to l
amm1812

Answer:

B) $43.40

Step-by-step explanation:

For the tax, 6% of 35 = 2.1

So with tax = $35 + 2.1 = $37.1

18% tip

So, 18% of 35 = 6.3

So we are gonna add all the costs together = 37.1 + 6.3 = $43.40

3 0
3 years ago
Construct a 95% confidence interval for the population mean, μ. Assume the population has a normal distribution. A random sample
GuDViN [60]

Answer: (628.48,\ 661.52)

Step-by-step explanation:

Given : Sample size : n=16 , which is a small sample (, 30) so we use t-test.

Sample mean : \overline{x}=645 \text{ hours}

Standard deviation : \sigma = 31 \text{ hours}

Significance level : \alpha=1-0.95=0.05

Critical value : t_{n-1,\alpha/2}=2.131

The confidence interval for population mean is given by :-

\overline{x}\pm t_{n-1,\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=645\pm(2.131)\dfrac{31}{\sqrt{16}}\\\\\approx645\pm16.52\\\\=(645-16.52,\ 645+16.52)\\\\=(628.48,\ 661.52)

Hence, a 95% confidence interval for the population mean \mu = (628.48,\ 661.52)

6 0
3 years ago
What is the area of the triangle 4.5 ft tall and 8.7 ft wide?​
Cerrena [4.2K]

Answer:

39.15

Step-by-step explanation:

For area you just do 4.5 times 8.7 and then you get 39.15

5 0
3 years ago
Read 2 more answers
Which of the following is a disadvantage to using graphs and diagrams? CHECK ALL THAT APPLY (select more than 1 answer)
romanna [79]

Answer:

Aand C I think ......................

4 0
3 years ago
Pre Calc for one of my classes
GREYUIT [131]
Use index form. N= a^x becomes log a (N) = x
Therefore your question becomes (log 2.3 (13))/9 = x
And rounding to 3 decimals gives you 0.342
8 0
3 years ago
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