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Solve n^2+n-90=0 to find the value of n?

Using the quadratic formula with a calculator a=1 b=1 c=-90 answers are n=-10 and n=9Factorising (n-9)(n+10)=0 answers are n=-10 and n=9
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Answered by Asher L. • Maths tutor
8355 Views

Vous écrivez un article sur la qualité des collèges en Grande-Bretagne pour un magazine français. Décrivez : • pourquoi votre collège est un bon collège • un événement scolaire mémorable. Ecrivez environ 150 mots en français.

Mon collège est petit mais très beau. J’aime la plupart des profs parce qu’ils sont gentils et parfois drôles. De plus, les cours sont très intéressants. Ma matière préférée est la technologie parce qu’on fa...
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Answered by Anna S. • French tutor
6135 Views

What are the different kinds of nuclear radiation?

There are three kinds of nuclear radiation that you need to know for GCSE physics, and each is considerably different from the others. Firstly, alpha radiation: this is when a chunk of the nucleus is emitted...
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Answered by Matthew M. • Physics tutor
2569 Views

How many nucleotides code for an amino acid in protein synthesis?

THREE
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Answered by Akaash B. • Biology tutor
2746 Views

Solve these simultaneous equations.....3a+2b = 17 and 8a-2b= 60

3a+2b = 178a-2b = 60We are going to solve this using the elimination method. This means that we are going to eliminate the variable (or letter) that has the same value in each equation. In this case it is th...
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Answered by Joel O. • Maths tutor
6403 Views