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2 years ago

Help with these please.

Mathematics

1 answer:

zepelin [54]2 years ago

7 0

For numbers 15-17, we need to remember that two of a triangle's angles are always acute and the third angle will allow us to classify the triangle based on its angles. now that we know this, let's look at #15. the first two angles listed are acute, and the third is an obtuse angle, therefore it is an obtuse triangle. on #16 we have three acute angles, so it is an acute triangle. #17 has two acute angles and a right angle so it is a right triangle.
on numbers 21-23, we need to know that a triangle with all congruent sides is called equilateral, a triangle with two equal sides is isosceles, and a triangle with no equal sides is called scalene. #21 shows two equal sides so it is an isosceles triangle. #22 has three equal sides so it is an equilateral triangle. #23 has no equal sides so it is scalene. hope this helped! :)

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Kazeer [188]

Answer:

x=30. y=60

Step-by-step explanation:

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prohojiy [21]

Move everything to one side
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2 years ago

Which expression has the fewest significant figures?

yanalaym [24]

Hello!

Here are some rules to determine the number of significant figures.

Numbers that are not zero are significant (45 - all are sigfigs)
Zeros between non-zero digits are significant (3006 → all are sigfigs)
Trailing zeros are not significant (0.067 → the first two zeros are not sigfigs)
Trailing zeros after a decimal point are always significant (1.000 → all are sigfigs)
Trailing zeros in a whole number are not significant (7800 → the last two zeros are not sigfigs)
In scientific notation, the exponential digits are not significant, known as place holders (6.02 x 10² → 10² is not a sigfig)

Now, let's find the number of significant figures in each given number.

A). 296.54

Since these digits are all non-zero, there are 5 significant figures.

B). 5003.1

Since the two zeros are between non-zero digits, they are significant figures. Thus, there are 5 significant figures.

C). 360.01

Again, the two zeros are between non-zero digits. There are 5 significant figures.

D). 18.3

All of these digits are non-zero, hence, there are 3 significant figures.

Therefore, expression D has the fewest number of significant figures being 3.

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2 years ago

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Yakvenalex [24]

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