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2 years ago

A triangle has sides with lengths of 11 inches, 15 inches, and 18 inches. Is it a right triangle?

Mathematics

2 answers:

Sergio [31]2 years ago

8 0

Answer:

Step-by-step explanation:

MrRissso [65]2 years ago

4 0

Answer: its not right triangle

Step-by-step explanation: no becauce $11^2+15^2\neq 18^2=> 346\neq 324$

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Simplify these expressions

Xelga [282]

$\frac{10a}{2} \\ \\ 5a \\ \\$

The answer is: 5a

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The answer is: 6

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$\frac{16c^2}{8c} \\ \\ 2c^{2-1} \\ \\ 2c^1 \\ \\ 2c \\ \\$

The answer is: 2c

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The answer is: 9ab

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3 years ago

What is the value of y in the equation 3(3y – 12) = 0? (5 points)

natta225 [31]

Set equal to 0

3=0, nope

3y-12=0
add 12
3y=12
divide 3
y=4

5p-4p-8=-2+3
p-8=1
p=9
1 solution

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3 years ago

Read 2 more answers

Answers to Unit Test quadratic functions. These answers will get you an 96 on the test.

larisa86 [58]

Answer:

What's the question?

Step-by-step explanation:

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2 years ago

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What is the perimeter of the polygon? Do not round any side lengths. Please help me.

DanielleElmas [232]

The easiest way to do this is to plot the points. I used the pythagorean theorem for this one, too. Add the side lengths to get the perimeter: 5 + 5 + 5 + 3 + √40 = 24.32455532 units or just 24 units.

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3 years ago

In a recent study of 42 eighth graders, the mean number of hours per week that they watched television was 19.6. Assume the popu

olya-2409 [2.1K]

Answer:

$19.6-2.42\frac{5.8}{\sqrt{42}}=17.43$

$19.6+2.42\frac{5.8}{\sqrt{42}}=21.77$

And the best option for this case would be:

a. (17.5, 21.7)

Step-by-step explanation:

Information given

$\bar X= 19.6$ represent the sample mean

$\mu$ population mean

$\sigma= 5.8$ represent the population deviation

n=42 represent the sample size

Confidence interval

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom, given by:

$df=n-1=42-1=41$

Since the Confidence is 0.98 or 98%, the significance would be $\alpha=0.02$ and $\alpha/2 =0.1$ , and the critical value would be $t_{\alpha/2}=2.42$

Replacing we got:

$19.6-2.42\frac{5.8}{\sqrt{42}}=17.43$

$19.6+2.42\frac{5.8}{\sqrt{42}}=21.77$

And the best option for this case would be:

a. (17.5, 21.7)

8 0

3 years ago