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3 years ago

UZ:51:35

Mathematics

2 answers:

mihalych1998 [28]3 years ago

7 0

Answer:

39.4 on edge

Step-by-step explanation:

notka56 [123]3 years ago

3 0

Answer:

39.4°

Step-by-step explanation:

The tangent of the angle is the ratio of its opposite side (XY) to its adjacent side (YZ).

tan(Z) = XY/YZ = 12.4/15.1

∠Z = arctan(12.4/15.1)

∠Z ≈ 39.4°

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Andrea sells photographs at art fairs. She prices the photos according to size: small photos cost $10, medium photos cost $15, a

Talja [164]

Answer: she must sell 6 large photos and 6 small photos

Step-by-step explanation: and how I knew that is I multiplied 6 40 times and that gives you 240 and if you multiply 6 ten times that gives you 60 so 240 plus 60 is $300

4 0

2 years ago

A major department store chain is interested in estimating the mean amount its credit card customers spent on their first visit

sergiy2304 [10]

Answer:

95% Confidence interval: (39.43, 61.58)

Step-by-step explanation:

We are given the following in the question:

Sample mean, $\bar{x}$ = $50.50

Sample size, n = 15

Alpha, α = 0.05

Sample standard deviation = 20

95% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 14 and}~\alpha_{0.05} = \pm 2.1447$

$=50.50 \pm 2.1447(\dfrac{20}{\sqrt{15}} ) \\\\= 50.50 \pm 11.0751 \\= (39.4249,61.5751)\\\approx (39.43, 61.58)$

95% Confidence interval: (39.43, 61.58)

8 0

3 years ago

HELP PLEASE DEADLINE

ELEN [110]

Reason 1: Given.

Reason 2: Vertical angles

Reason 3: Angle, Side, Angle(ASA)

8 0

3 years ago

Help binomial distributions

Ymorist [56]

We have the formula to compute the probability of having exactly k successed over n trials, given a probability p of success (and implicitly a probability 1-p of failure), which is

$P(\text{k successed on n trials}) = \binom{n}{k}p^k(1-p)^{n-k}$

Now, the probability of at least 3 successes is the union of the following event: exactly three successes,exactly four successes and exactly five successes.

We can compute their probability and sum them: $\binom{5}{3}\left(\frac{3}{7}\right)^3\left(\frac{4}{7}\right)^2 + \binom{5}{4}\left(\frac{3}{7}\right)^4\left(\frac{4}{7}\right)^1 + \binom{5}{5}\left(\frac{3}{7}\right)^5 \approx 0.36788$

So, the answer is about 36.79%

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3 years ago

Rewrite 2 4/7 as an improper fraction

Nataliya [291]

2 = 14 now add the extra 4/7 and you will get 18/7.
7

2 4
 7 using the algorithm (a shortcut way) 2x7=14+4=18 and put that 18 over the denominator 7. Done!

3 0

3 years ago

Read 2 more answers