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Olin [163]
4 years ago
8

PLEASE HELP I NEED IT!!!!when yeast is added to bread doughit produces carbon dioxide the pressure of the gas causes the bread t

o rise explain how the rising of of dough is an example of a chemical change and a physical change
Mathematics
1 answer:
kondor19780726 [428]4 years ago
6 0
The rising of of dough is an example of a chemical change and a physical change because, when t<span>he carbon dioxide gas produces, it is a chemical change, and as the dough rises, it shows the change in volume, which is an example of a physical change.</span>
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There are 32 pupils in a class. 20 of them are girls. What is the ratio of boys to girls in it’s simplest form
Ray Of Light [21]

Hello!

If there are 32 people in total in the class, and 20 of them are girls, that means there are 12 boys in the class

so the ratio of boys to girls is 12:20

to get simplest form, divide by the greatest common factor. which in this case, is 4.

12 / 4 = 3

20 / 4 = 5

your final answer is: boys:girls, 3:5

I hope this helps, and have a nice day!

7 0
3 years ago
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3 years ago
the pizza slice served at O'Connor's pizza place are 1/4 of a whole pizza. There are three pizzas ready to be served. 14 childre
Vitek1552 [10]
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3 years ago
Please help!! I'm really confused
Cloud [144]

Answer: im on this one too

Step-by-step explanation:

8 0
3 years ago
Solve 2x^2 − 8x = −7
kenny6666 [7]

Answer:

The answer to your question is below

Step-by-step explanation:

                                2x²  -   8x   =  - 7

Divide by 2

\frac{2}{2} x^{2}  - \frac{8}{2} x    = \frac{-7}{2}

Complete the trinomial

x^{2}  - 4x + (2)^{2}  = \frac{-7}{2} + (2)^{2}

Simplify

x^{2}  - 4x  + (2)^{2}  = \frac{- 7 + 4}{2}

x^{2}  - 4x + 4 = \frac{-3}{2}

Factor

(x - 2)²  =  \frac{-3}{2}

Get the square root

\sqrt{(x - 2)^{2}} = \sqrt{\frac{-3}{2}}

Simplification

               x - 2 =± \sqrt{\frac{3}{2}} i

      x₁ = 2 + \sqrt{\frac{3}{2}} i

       x₂ = 2 - \sqrt{\frac{3}{2}}

6 0
3 years ago
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