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3 years ago

AHHHHHHHHHHHHH TYSM!!!,!❤️❤️❤️❤️❤️❤️❤️❤️❤️✨✨✨✨✨✨✨✨✨

Mathematics

1 answer:

Pavlova-9 [17]3 years ago

6 0

Answer:

What is this?

Step-by-step explanation:

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Which equation can we use to find the length of the side labeled x? What is the value of x?

pentagon [3]

Answer:

option d

d ---- sin30 =5/x

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3 years ago

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How do you tell if a graph is a function

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Take a vertical line and place it on thegraph. If the graph is a function, then no matter where on the graph you place the vertical line, the graphshould only cross the vertical line once.

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How many solutions does x^2=9 have

defon

Answer:

Your answer is 1

Step-by-step explanation:

3² = 9 is the only possible solution.

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A department store wants to know what fraction of its customers in a certain market have store credit cards, and what their aver

bearhunter [10]

Answer:

The 98% confidence interval for the average credit card balance is

(564.04, 635.96).

Step-by-step explanation:

We have to calculate the 98% confidence interval on the average credit card balance.

The sample will consist of the n=30 customers that have credit card.

The sample has a mean of $600 and a standard deviation of $80.

As the population standard deviation is estimated from the sample standard deviation, we will use a t statistic.

The degrees of freedom are:

$df=n-1=30-1=29$

The critical value for a 98% CI and 29 degrees of freedom is t=2.463 (this can be looked up in a t-table).

Then, the margin of error is:

$E=t\cdot s/\sqrt{n}=2.463*80/\sqrt{30}=197.04/5.48=35.96$

Then, the upper and lower bounds of the confidence interval are:

$LL=\bar X-E=600-35.96=564.04\\\\UL=\bar X+E=600+35.96=635.96$

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3 years ago

Pick out the set of numbers that is not Pythagorean triple

Zielflug [23.3K]

Answer:

$\huge\boxed{9,40,46}$

Step-by-step explanation:

Let's check it using Pythagorean Theorem:

$c^2 = a^2 + b^2$

Where c is the longest sides, a and b are rest of the 2 sides

1) 9 , 40 , 46

=> $c^2 = a^2 + b^2$

=> $46^2 = 9^2 + 40^2$

=> 2116 = 81 + 1600

=> 2116 ≠ 1681

So, this is not a Pythagorean Triplet

2) 16, 30 and 34

=> $c^2 = a^2 + b^2$

=> $34^2 = 16^2 + 30^2$

=> 1156 = 256 + 900

=> 1156 = 1156

No need to check more as we've found the one which is not a Pythagorean Triplet.

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