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Solve the following equation: b - 6 = 13

b - 6 = 13 Add 6 to both sides of the equation b - 6 + 6 = 13 + 6 Therefore: b = 19
CM
Answered by Claire M. • Maths tutor
3505 Views

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

First, you need to factorise the quadratic:x 2 -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
SB
Answered by Sarah B. • Maths tutor
2639 Views

Differentiate sin^2(x)

sin(2x)
JP
Answered by James P. • Maths tutor
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3/8 is equivalent to ?/24. Find the missing number.

Firstly, we work out what the fraction has been multiplied by. Since the bottom of the fraction is 24, we want to see how many 8's fit into 24. The answer is 3, since 8 multiplied by 3 is 24.Since the bottom...
IB
Answered by isabella B. • Maths tutor
25479 Views

How can I factorise x^2 - 7x + 12?

So firstly, you want to split the equation into the format of a^2 + bx + c, so you know what a, b and c equal. a = 1b = -7c = 12 Now, you need to try to split the equation into the format (x + ?)(x + ?). To ...
GD
Answered by Georgia D. • Maths tutor
4757 Views