## Welcome to H3 Maths

Blog Support for Growing Mathematicians

### Best Online Math Tutor

November30

Khan Academy is one of the best-known online learning platforms for school students from classes 5-12. Founded by a Harvard graduate Sal Khan, Khan Academy has attracted funding from the Bill Gates Foundation because of the high-quality courses it offers to students.

The Math courses on the site are easy to understand and explain the key concepts in different ways. Over the years, Khan Academy is one of the few e-learning sites that has proactively worked to improve its quality. Here are some of the faces from the friendly Khan Academy team:

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10 x 9 x 8 + (7 + 6) x 5 x 4 x (3 + 2) x 1 = 2020

NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]