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kirill [66]
2 years ago
8

What is the minimum number of base-ten pieces needed to replace each set?

Mathematics
1 answer:
andreev551 [17]2 years ago
3 0

Answer:

The answer is .B

Step-by-step explanation:

Hope this can help you !

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Can someone please tell me the answers but also explain how to do it? Thank you
11111nata11111 [884]

Answer:

8: 90 degrees, 9: 165 degrees, 6: 81 degrees, 7: angles in the same segment are equal

Step-by-step explanation:

For question 8:

Notice how the line AB just barely touches the edge of the circle. We call this kind of line a tangent. The point O is at the center of the circle so the line OB is a radius. The angle between a tangent and a radius is always 90 degrees, so ABO is 90 degrees.

For question 9:

By the exact same logic as 8, ACO is also 90 degrees. The sum of interior angles in a 4 sided shape (a quadrilateral) is always 360 degrees. This means that 15 + 90 + 90 + x = 360 = 195 + x so x = 360 - 195 = 165

For question 6/7:

We use the theorem that the angles in the same segment are equal. This means that a is 81 degrees.

5 0
3 years ago
Bubble algae cells can grow up to 5 cm in diameter. Calculate the surface area : volume ratio of this cell.
Mars2501 [29]

Answer:

6:5

Step-by-step explanation:

Bubble algae cells can grow up to 5 cm in diameter. Calculate the surface area : volume ratio of this cell.

The algae is spherical in nature

Volume of the algae =4/3 pi r³

Volume of the algae = 4/3×pi×2.5³

Volume of the algae = 62.5/3 pi

Surface area = 4pi r²

Surface area = 4pi ×2.5²

Surface area = 25pi

Taking their ratio

surface area : volume ratio

= 25pi:62.5/3 pi

= 25 × 3/62.5

= 1.2

Hence the required ratio is 12/10 which is 6:5

4 0
3 years ago
(3x+4)–(2x+9)=15<br><br> Help meeeeeeeeeeeee.
melamori03 [73]

Answer:

x=30

Step-by-step explanation:

you distribute the negative to 2x and 19

3x+4-2x-19=15

then you combine like terms

x-15=15

you add 15 to both sides

x=30

4 0
3 years ago
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Penny wants to make a model of a beetle that is larger than life size. Penny says she is going to use a scaling factor of 7/12.
MakcuM [25]
It would be nonsense, as if the beetle were at normal size, then it would be considered 1/1 as a scale. If you wanted to increase it, you would increase the numerator.
4 0
3 years ago
Read 2 more answers
Slope 2/5, y-intercept 2
Tanzania [10]

Answer:

y = 0.4x + 2

Step-by-step explanation:

3 0
3 years ago
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