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Anna11 [10]
3 years ago
6

Joe spends $8 on lunch and 6.50 on dry cleaning.He also buys 2 shirts that cost the same amount. Joe spends a total of $52.What

is the cost of each shirt?
Mathematics
2 answers:
Ivahew [28]3 years ago
5 0
It would be 18.75 per shirt you buy
emmainna [20.7K]3 years ago
4 0
52-8=44
44-6.50=37.50
37.50/2=18.75
18.75 per shirt
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A local bank needs information concerning the savings account balances of its customers. A random sample of 15 accounts was chec
PSYCHO15rus [73]

Answer:

(513.14, 860.36) is a 98% confidence interval for the true mean

Step-by-step explanation:

We have a small sample size of n = 15, the mean balance was \bar{x} = 686.75 with a standard deviation of s = 256.20. The confidence interval is given by \bar{x}\pm t_{\alpha/2}(\frac{s}{\sqrt{n}}) where t_{\alpha/2} is the 100(\alpha/2)th quantile of the t distribution with n-1=15-1=14 degrees of freedom. As we want a 100(1-\alpha)% = 98% confidence interval, we have that \alpha = 0.02 and the confidence interval is 686.75\pm t_{0.01}(\frac{256.20}{\sqrt{15}}) where t_{0.01} is the 1st quantile of the t distribution with 14 df, i.e., t_{0.01} = -2.6245. Then, we have 686.75\pm (-2.6245)(\frac{256.20}{\sqrt{15}}) and the 98% confidence interval is given by (513.1379, 860.3621)

7 0
4 years ago
The sum of a number and 72 times its reciprocal is -17. Find the number
butalik [34]
Let, the number = x

Then, x + 72/x = -17

x² + 72 = -17x

x² + 17x + 72 = 0

x² + 8x + 9x + 72 = 0

x(x + 8) 9(x + 8) = 0

(x + 8)(x + 9) = 0

x = -8 OR -9

In short, Your Number would be: Either -9 or -8

Hope this helps!
3 0
3 years ago
Fernando bought 8 pints of milk. how many fluid ounces of milk Fernando buy?
IRISSAK [1]

128 fluid ounces of milk

4 0
3 years ago
Read 2 more answers
What is the answer to the system?​
omeli [17]

\begin{cases}x + y  = 40 \\  \frac{x}{20} +  \frac{y}{4}   = 6\end{cases} \\ \Leftrightarrow \begin{cases} x + y = 40\\x + 5y = 120 \end{cases} \\ \Leftrightarrow \begin{cases} x + y = 40\\ 4y = 80\end{cases} \\ \Leftrightarrow \begin{cases}x  = 20 \\ y = 20\end{cases}

6 0
4 years ago
The supply curve for steel is 90x−y=−50. The demand curve is 10x+y=200. x is quantity in thousands of metric tons y is price in
ivolga24 [154]

Answer:

The intersection point of the two curves is (x,y) = \left(\frac{3}{2}\,kton.m, 185\,USD \right).

Step-by-step explanation:

From statement we get the following equations:

Supply curve

90\cdot x - y = -50 (1)

Demand curve

10\cdot x + y = 200 (2)

Where:

x - Quantity, measured in thousands of metric tons.

y - Price, measured in US dollars per metric tons.

If we add both equations, then we find that quantity is:

(90\cdot x -y )+(10\cdot x +y) = -50+200

100\cdot x = 150

x = \frac{3}{2}\,kton.m

Then, we finally find the price by substituting on (2):

y = 200-10\cdot \left(\frac{3}{2} \right)

y = 200-15

y = 185\,USD

The intersection point of the two curves is (x,y) = \left(\frac{3}{2}\,kton.m, 185\,USD \right).

5 0
3 years ago
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