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Solve the following equation: b - 6 = 13

b - 6 = 13Add 6 to both sides of the equationb - 6 + 6 = 13 + 6Therefore:b = 19

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Where does the graph x^2-3x-4 cross the x axis?

First, you need to factorise the quadratic:x²-3x-4=0(x-4)(x+1)=0Then, set each of the brackets to equal 0 and solve for x:x-4=0 --> x = 4x+1=0 --> x=-1

Answered by Sarah B. • Maths tutor

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Differentiate sin^2(x)

sin(2x)

Answered by James P. • Maths tutor

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Describe the similarities and differences between ionic and (simple) covalent bonding?

Similarities Doesn't conduct electricity (only when the ionic is in solid) and covalent always (no charged particles) Many dissolve in water Differences Ionic substances loose or gain and electron to beco...

Answered by Holly L. • Chemistry tutor

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Why is Respiration important for living organisms? (3)

Respiration releases Energy(1), Energy in the form of ATP(1) and this is needed for life of an organism to bring about various moments and growth (1).

Answered by Holly L. • Biology tutor

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