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Solve the simultaneous equations, x+y = 16, 5x -2y = 17

Multiply the first equation by 2 to obtain 2x+2y = 32,Then use the elimination technique and add the first equation into the second equation to get : 7x = 49 therefore divide by 7 to find x = 7 Sub this valu...
MO
Answered by Matthew O. • Maths tutor
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How do you know which chemicals are formed at the electrodes in the electrolysis of aqueous solutions?

In electrolysis, positive ions will be attracted to the negative cathode (the cat hode being negative can be remembered because cats are evil). However, in aqueous solutions there are 2 positive ions: the on...
SB
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Expand and simplify (x+1)(2x+3).

We first expand the first set of brackets by multiplying each element of it by the second set of brackets so (x + 1)(2x + 3) = (x)(2x + 3) + (1)(2x + 3) = x(2x + 3) + (2x + 3). We can then expand out the fir...
ML
Answered by Matthew L. • Maths tutor
10601 Views

Solve the following simulatenous equation to find the values of both x and y: 5x+2y=16 and 3x-y=14

x=4, y=-2
JD
Answered by JESSICA D. • Maths tutor
4095 Views

What is photosynthesis and where does in occur?

"Photo" means light and "synthesis" means to make something. Photosynthesis is the production of oxygen and glucose from sunlight, carbon dioxide and water in green plants. The glucose cr...
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Answered by Bella B. • Biology tutor
5378 Views