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3 years ago

Which of these figures has rotational symmetry?

Mathematics

2 answers:

USPshnik [31]3 years ago

5 0

Answer:C

Step-by-step explanation: It should look the same after turning at a 180ﾟ

UkoKoshka [18]3 years ago

3 0

C.
If you spin it around 180 degrees from the center, it's the same object

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In Geometry class, Taryn presented a counterexample to disprove a conjecture

AleksandrR [38]

Answer:If a polygon is not regular will it have any congruent angles

Step-by-step explanation:

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3 years ago

what does the rate of change represent? i left answer choices on there. also is this linear or non linear?

denpristay [2]

Rate of Change represents the number of apartments cleaned each hour & this is linear.

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2 years ago

5th grade math. correct answer will be marked brainliest.

nordsb [41]

Answer: 60

Step-by-step explanation: that’s the first two, good luck!

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2 years ago

Use the standard normal distribution or the t-distribution to construct a 99% confidence interval for the population mean. Jus

vichka [17]

Answer:

(25.732,30.868)

Step-by-step explanation:

Given that in a random sample of 42 people, the mean body mass index (BMI) was 28.3 and the standard deviation was 6.09.

Since only sample std deviation is known we can use only t distribution

Std error = $\frac{s}{\sqrt{n} } =\frac{6.09}{\sqrt{42} } \\=0.9397$

$df = 42-1 =41$

t critical for 99% two tailed $= 2.733$

Margin of error $= 2.733*0.9397=2.568$

Confidence interval lower bound = $28.3-2.568=25.732$

Upper bound = $28.3+2.568=30.868$

3 0

2 years ago

If x2 = 30, what is the value of x? +60 +15 130 O: 15

Tresset [83]

Answer:

<h2>(+)(-)√30</h2><h2>#option c</h2>

Step-by-step explanation:

☆ REFER TO THE ATTACHMENT!

<h3>♰Hope it helps................</h3>

7 0

2 years ago