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kogti [31]
3 years ago
7

A toy was originally $35 and it is now $28. What prectinge was the toy marked down to?

Mathematics
2 answers:
Sav [38]3 years ago
4 0

Answer:

There was a $7.00 dollar percentage drop from when it was $35 dollars

Step-by-step explanation:

$35.00 - $28.00 = $7.00 The percentage drop is 20%

zaharov [31]3 years ago
3 0

Answer: 20%

Step-by-step explanation:

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Last week, 108 cars received parking violations in the main university parking lot. Of these, 27 had unpaid parking tickets from
garik1379 [7]

Answer:

95 percent confidence interval

[0.208,0.29166]

Step-by-step explanation:

First we identificate the sample proportion p = 27 /108, and we find the 95 percent confidence interval for P(population proportion) in this context the parking violations that have prior unpaid parking tickets.

Then α = 0.05 and 1 - α/2 = 0.975

Thus Z_{0.975} = 1.96

The 95 percent confidence interval is

[ p ± 1.96 \sqrt{\frac{p(1-p)}{n} } ]

[0.25  ± 1.96 \sqrt{\frac{0.25*0.75}{108} } ]

[0.208,0.29166]

6 0
3 years ago
Solve for x : <br><br><img src="https://tex.z-dn.net/?f=%5Cqquad%20%5Crightarrow%5Cbf%204x%20%2B%209x%20%2B%202x%20%3D%2030" id=
Lubov Fominskaja [6]

Answer:

x=2

Step-by-step explanation:

combine like terms to get 15x=30. divide by 15 on both sides to get x=2

4 0
2 years ago
Read 2 more answers
A trucking firm has a large inventory of spare parts that have been in storage for a long time. It knowsthat some proportion of
Debora [2.8K]

Answer:

0.1546\leq \widehat{p}\leq 0.3513

Step-by-step explanation:

The firm tests 75 parts, and finds that 0.25 of them are notusable

n = 75

x = 0.25 \times 75 = 18.75≈19

\widehat{p}=\frac{x}{n}

\widehat{p}=\frac{19}{75}

\widehat{p}=0.253

Confidence level = 95%

So, Z_\alpha at 95% = 1.96

Formula of confidence interval of one sample proportion:

=\widehat{p}-Z_\alpha \sqrt{\frac{\widehat{p}(1-\widehat{p}}{n}}\leq \widehat{p}\leq \widehat{p}+Z_\alpha \sqrt{\frac{\widehat{p}(1-\widehat{p}}{n}}

=0.253-(1.96)\sqrt{\frac{0.253(1-0.253)}{75}}\leq \widehat{p}\leq0.253+(1.96)\sqrt{\frac{0.253(1-0.253}{75}}

Confidence interval =0.1546\leq \widehat{p}\leq 0.3513

7 0
3 years ago
(5x4 + 5x3 + 4x - 9) + (2x4 + 7x2 + 2x + 14)
ladessa [460]

Answer:

7x⁴ + 5x³ + 7x² + 6x + 5

Step-by-step explanation:

The given expression is

(5x4 + 5x3 + 4x - 9) + (2x4 + 7x2 + 2x + 14)

The first step is to open the brackets by multiplying each term inside each bracket by the term outside each bracket. Since the term outside each bracket is 1, the expression becomes

5x⁴ + 5x³ + 4x - 9 + 2x⁴ + 7x² + 2x + 14

We would collect like terms by combining each term with the same exponent or raised to the same power. The term would be arranged in decreasing order of the exponents. It becomes

5x⁴ + 2x⁴ + 5x³ + 7x² + 4x + 2x - 9 + 14

7x⁴ + 5x³ + 7x² + 6x + 5

7 0
3 years ago
The daily temperatures in fall and winter months in Virginia have a mean of 62°F. A meteorologist in southwest
marshall27 [118]

Answer:

,, assuming the true mean temperature 62 degrees Fahrenheit there is a 0.1% probability that the null hypothesis is true by chance alone

8 0
2 years ago
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