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emmainna [20.7K]
2 years ago
9

PLEASE HELP

Mathematics
2 answers:
IRISSAK [1]2 years ago
8 0

Answer:

d.

Step-by-step explanation:

If 2 pounds is equal to 3 dollars, which of the following is incorrect?

A. 11 pounds is 16.50 dollars

B. 28 pounds is 44 dollars

C. 10 pounds is 15 dollars

D. 23 pounds is 34.50 dollars

Wittaler [7]2 years ago
7 0

Answer:

B

Step-by-step explanation:

one pound is 1.5 dollar but 28 time 1.5 is not 44 dollor

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Answer:

<h2>24 units</h2>

Step-by-step explanation:

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An internet cafe charges a fixed amount per minute to use the internet. The cost of using the internet in dollars is, y = 3/4x.
Vinil7 [7]

ANSWER

8 minutes

EXPLANATION

We know that the cost of using the internet in dollars is given by,

y=\frac{3}{4}x

Where x is the number of minutes spent on the internet.

In this problem, we have to find how many minutes will 6 dollars buy. In other words, we have to find x for y = 6. To solve the given equation for x, we have to multiply both sides by 4,

\begin{gathered} 4y=4\cdot\frac{3}{4}x \\  \\ 4y=3x \end{gathered}

And divide both sides by 3,

\begin{gathered} \frac{4y}{3}=\frac{3x}{3} \\  \\ \frac{4y}{3}=x \end{gathered}

So, for y = 6, x is,

x=\frac{4\cdot6}{3}=\frac{24}{3}=8

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8 0
1 year ago
The Chartered Financial Analyst (CFA) designation is fast becoming a requirement for serious investment professionals. Although
Nastasia [14]

Answer:  ($141,775, $158,225)

Step-by-step explanation:

Given : Significance level : \alpha: 1-0.9=0.1

Critical value : z_{\alpha/2}=1.645

Sample size : n= 49

Sample mean : \overline{x}=150,000

Standard deviation : \sigma=35,000

The confidence interval for population mean is given by :_

\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}

= 150,000\pm (1.645)\dfrac{35000}{\sqrt{49}}\\\\\approx150,000\pm8225\\\\=(150,000-8225,150,000+8225)=(141,775,158,225)

Hence,he 90% confidence interval for the average salary of a CFA charter-holder = ($141,775, $158,225)

7 0
3 years ago
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