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How do I learn when to use each case and not confuse them in speech or writing?

The case system in Russian can be quite daunting, especially because it is a very different structure to what we use in English. Memorizing each individual ending can take a long time and a lot of practice, ...
AP
Answered by Alex P. • Russian tutor
2898 Views

What is the equation for aerobic respiration in humans?

glucose+oxygen-->water+carbon dioxide c6h12o6+6o2-->6h2o+6co2
ME
Answered by Mara E. • Biology tutor
4590 Views

Triangle ABC is a triangle with a right angle at vertex B. Length BC = 6cm and angle A = 30 degrees. How long is length AC?

Draw the triangle. BC is opposite to the angle given and we need to find the hypotenuse. Using SOHCAHTOA, we must use sine. Rearrange to find hypotenuse and then put the numbers in. Length AC = 12cm
CC
Answered by Courtney C. • Maths tutor
3930 Views

Where does the quadratic formula come from?

First take the general form of a quadratic equation, ax^2+bx+c=0, this can be written in completed square form, (x+b/2a)^2-(b/2a)^2+c/a=0, rearranging gives, x=-b/2a +/-(b^2/4a^2-c/a)^1/2, which can be writt...
BC
Answered by Becky C. • Maths tutor
4737 Views

Define relative formula mass (Mr) and calculate the relative formula mass of CaCO3. (Ar: Calcium= 40; Oxygen= 16; Carbon= 12)

The relative formula mass (Mr) of a compound is the sum of the relative atomic masses of the atoms in the numbers shown in the formula. Relative formula mass (Mr) of CaCO3 = 40+12+(3x16)=100.
CM
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