3 years ago

Help, thank you. :)

Mathematics

2 answers:

ZanzabumX [31]3 years ago

6 0

AC=4DB......................................

vivado [14]3 years ago

4 0

Ac=4db is the correct statement

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How are the angles of an equilateral triangle related?

vfiekz [6]

All the angles and sides are equal.

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3 years ago

The___of the number -4 and 4 is 4

Illusion [34]

Absolute value hope this helps

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2 years ago

5 × (2 + 1)2 ÷ 3 = what's the answer I wrote this cus it said it was to short to post

shepuryov [24]

Answer:

Step-by-step explanation:

Follow PEMDAS

5 (2+1) x 2 divided by 3

calculate within parenthesis

(2+1) : 3

5 x 3 x 2 divided by 3

multiply and divide (left to right)

= 10

* x = times sign

8 0

3 years ago

Refer to the accompanying TI-83/84 Plus calculator display of a 95% confidence interval. The sample display results from using a

nikklg [1K]

Answer:

The confidence interval is $22.805$

Step-by-step explanation:

We have given,

The Z interval (23.305,25.075)

Mean $\bar{x}=23.69$

Sample n=30

To find : The confidence interval?

Solution :

We know, The confidence interval is in the format of

$\bar{x}-E$

E denotes the margin of error,

$E=\frac{U-L}{2}$

Where, U is the upper limit U=25.075

L is the lower limit L=23.305

$E=\frac{25.075-23.305}{2}$

$E=\frac{1.77}{2}$

$E=0.885$

Substitute the value of E and $\bar{x}$ in the formula,

$23.69-0.885$

$22.805$

Therefore, The confidence interval is $22.805$

8 0

3 years ago

A circle’s circumference is approximately 76 cm.

olya-2409 [2.1K]

Answer: Area= 459.73cm^2

Step-by-step explanation: Circumference of a circle is 2πr

76=2×3.14×r

r= 76÷(6×3.14)

r=12.10

Area of a circle= πr^2

Area= 3.14×(12.10)^2

Area= 456.73cm^2

8 0

3 years ago