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4 years ago

Justin wants to buy a new bike that costs $115. He has $40 and plans to

Mathematics

1 answer:

-BARSIC- [3]4 years ago

8 0

15x+40=115

15x means 15 per week solve for x if you want to know how many weeks 40 is what he has only once

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Sharon wants to make a graph to show the relationship between the number of tickets sold and the price of tickets sold. She plot

Bond [772]

It will not be dreaded across the entire coordinate plane because her numbers are wrong and so are her incorrect scales

5 0

3 years ago

Read 2 more answers

A random sample of 10 shipments of stick-on labels showed the following order sizes. 12,000 18,000 30,000 60,000 14,000 10,500 5

alexandr1967 [171]

Answer:

(a) 95% confidence interval for the true mean order size = [ 11972.22 , 37067.80 ]

Step-by-step explanation:

We are given a random sample of 10 shipments of stick-on labels with following order sizes;

12,000, 18,000, 30,000, 60,000, 14,000, 10,500, 52,000, 14,000, 15,700, 19,000

Firstly, Sample mean, $Xbar$ = $\frac{\sum X}{n}$

= $\frac{12,000+ 18,000+ 30,000 +60,000+ 14,000+ 10,500+ 52,000+ 14,000 +15,700+ 19,000}{10}$ = 24520

Sample standard deviation, s = $\sqrt{\frac{\sum (X-Xbar)^{2} }{n-1} }$ = 17541.81

The pivotal quantity for confidence interval is given by;

P.Q. = $\frac{Xbar - \mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

So, the 95% confidence interval for true mean order size is given by;

P(-2.262 < $t_9$ < 2.262) = 0.95

P(-2.262 < $\frac{Xbar - \mu}{\frac{s}{\sqrt{n} } }$ < 2.262) = 0.95

P(-2.262 * $\frac{s}{\sqrt{n} }$ < $Xbar - \mu$ < 2.262 * $\frac{s}{\sqrt{n} }$ ) = 0.95

P(Xbar - 2.262 * $\frac{s}{\sqrt{n} }$ < $\mu$ < Xbar + 2.262 * $\frac{s}{\sqrt{n} }$ ) = 0.95

95% confidence interval for $\mu$ = [ Xbar - 2.262 * $\frac{s}{\sqrt{n} }$ , Xbar + 2.262 * $\frac{s}{\sqrt{n} }$ ]

= [ 24520 - 2.262* $\frac{17541.81}{\sqrt{10} }$ , 24520 - 2.262* $\frac{17541.81}{\sqrt{10} }$ ]

= [ 11972.22 , 37067.80 ]

6 0

3 years ago

The slope intercept form

harina [27]

Answer:Slope-intercept form is y = mx + b form, where m represents the slope, and b represents the y-intercept. So if the equation of a line is y = 3/4 x - 2, then the line is written in slope intercept form, or y = mx + b form, with m = 3/4 and b = -2.

Step-by-step explanation:

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3 years ago

I don't understand this problem...<br> 1/4 x (-12)=

Nikitich [7]

Answer:

-3

Step-by-step explanation:

When multiplying a positive number with a negative number, the product will <u>always</u> be negative. First, let's solve the problem disregarding the negative sign.