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tiny-mole [99]
3 years ago
15

Which statement can you be sure is true?

Mathematics
1 answer:
Dmitry_Shevchenko [17]3 years ago
4 0
The second answer is the best choice: NO is parralell to ML
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An item has a listing price of $95. If the sales tax rate is 7%,how much is the sales tax (in dollars)?
rodikova [14]

Answer:

95*.07= 6.65 in sales tax

total of item and tax = 101.65

Step-by-step explanation:

4 0
3 years ago
Draw a ratio box for this problem. Then solve the
Naddik [55]

There are total 30 students in the piano class.

<h3>What is Ratio and Proportion ?</h3>

When a number can be divided by another number then they can be written as p : q , when two ratios can be equated using an equal sign then they are said to be in proportion.

It is given that the total number of girls is 40% of the total students

The ratio of total students to girls is 100 :40

= 10 :4

= 5 : 2

It is also given that in the total number of students 12 were girls

Let total students be x

Then the ratio is x : 12

As both the ratio are same and so can be equated and the proportion will be

5 : 2 = x : 12

5/2 = x /12

x = 30

Therefore there are total 30 students in the piano class.

To know more about Ratio and Proportion

brainly.com/question/26974513

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3 0
2 years ago
Jane wants to estimate the proportion of students on her campus who eat cauliflower. after surveying 39 ​students, she finds 4 w
stellarik [79]

Let x be the number of students who eat cauliflower.

Therefore, x=4.

Let n be the total number of students surveyed.

Therefore, n=39

Thus, \hat p=\frac{4}{39} =0.10256

Now, for 90% confidence level, from the table we know that Z=1.645.

The formula for the interval range of proportion of students is :

p= \hat p\pm Z\sqrt{\frac{\hat p(1-\hat p)}{n}}

Plugging in the values we get:

p=0.10256\pm 1.645\sqrt{\frac{0.10256(1-0.10256)}{39}}=0.10256\pm 0.04858=0.15114, 0.05398

Thus, Jane is 90% confident that the population proportion p, for students who eat cauliflower in her campus is between 5.398% and 15.114% (after converting the answer we got to percentage).

7 0
3 years ago
Larry mows lawns for $50 an hour. Last week, he gave all his customers a 20% discount off his hourly rate. Mrs. Grinnell hired L
joja [24]
The answer would be D: $108
4 0
3 years ago
Read 2 more answers
Express each ratio in simplest form 18:30=
MatroZZZ [7]
<span>Express each ratio in simplest form 18:30
</span>\frac{18}{30} =  \frac{3}{5}<span>
</span>
4 0
3 years ago
Read 2 more answers
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