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3 years ago

Each square below represents one whole.

Mathematics

2 answers:

Likurg_2 [28]3 years ago

7 0

Answer:175%

Step-by-step explanation:

Percent means per hundred.

So, we need an equivalent ratio that will tell us how many pieces would be shaded out of 100100100 pieces per whole.

7 shaded parts times 25 equals 175 shaded parts. 4 parts per whole times 25 equals 100 parts per whole. 7 to 4 is equivalent to 175 to 100.

Usimov [2.4K]3 years ago

4 0

Answer:

SQUARE 1:

100% ; 75%

Step-by-step explanation:

SQUARE 1:

If each square represents a whole ; the percentage of a whole = 100%

Dividing the square into 4 equal parts :

Percentage of each part :

100% ÷ 4 = 25%

Percentage represented by the shaded part:

(Percentage of each shaded part * number of shaded part)

(25% * 4) = 100%

SQUARE 2:

each square represents a whole ; the percentage of a whole = 100%

Dividing the square into 4 equal parts :

Percentage of each part :

100% ÷ 4 = 25%

Percentage represented by the shaded part:

(Percentage of each shaded part * number of shaded part)

(25% * 3) = 75%

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find the side lengths of each triangle. I can't figure out the formula. awnsers with work would be most helpful. Im having most

34kurt

18. (if you needed it)

The triangle is an equilateral triangle, it has 3 congruent/equal side lengths and 3 congruent angles.

To find "z", you can set the sides equal to each other (you can just do two sides since they are all suppose to be the same lengths)

z + 5 = 4z - 4 Subtract z on both sides

5 = 3z - 4 Add 4 on both sides

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[proof]

z + 5

3 + 5 = 8

4z - 4

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19. This is an isosceles triangle, which is a triangle that has 2 congruent sides and 2 congruent angles. (The red tick marks shows that the sides are the same/equal)

Since the 2 sides are the same length, you can set them equal to each other to find "x":

2x + 6.8 = 8x + 1.4 Subtract 2x on both sides

6.8 = 6x + 1.4 Subtract 1.4 on both sides

5.4 = 6x Divide 6 on both sides

0.9 = x

Now that you know x, you can find the sides:

2x + 6.8

2(0.9) + 6.8

1.8 + 6.8 = 8.6

8x + 1.4

8(0.9) + 1.4

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The two side lengths are 8.6

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4 years ago

An article describes the chemical compositions of certain minerals in the early Archaean mantle. For a certain type of olivine a

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Answer:

The mean is 40.35 and the standard deviation is 0.13.

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a certain type of olivine assembly, the silicon dioxide (SiO2) content (in weight percent) in a randomly chosen rock has mean 40.35 and standard deviation 0.4.

Sample of 10:

By the Central Limit Theorem, the mean is 40.35, and the standard deviation is $s = \frac{\sigma}{\sqrt{n}} = \frac{0.4}{\sqrt{10}} = 0.13$

The mean is 40.35 and the standard deviation is 0.13.

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