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Rearrange the following formula to make x the subject. y=4x-7

Answer: x=(y+7)/4 Workings:y=4x-7 add 7 to both sidesy+7=4x divide both sides by 4 to give the answer
MW
Answered by Megs W. • Maths tutor
10670 Views

2 sides of a right-angled triangle are 5cm and 6cm. Calculate the length of the hypotenuse.

You need to use Pythagoras's theorem which states that for any right angled triangle, a 2 +b 2 =c 2 , where c is the hypotenuse and a and b are the other 2 sides of the triangle. Therefore, in this case a an...
RM
Answered by Rikesh M. • Maths tutor
9560 Views

What is the value of 64^(2/3)?

The index is 2/3 so first of all we can separate this and begin by looking at the 1/3. Fractions as indices mean that you must root the number, in this case we must cube root it because of the 3 in the denom...
SQ
Answered by Sinead Q. • Maths tutor
10342 Views

Find the first derivative of 2x^3+5x^2+4x+1 (with respect to x)

In differentiation, your goal is to reduce the power of the terms that you're differentiating with respect to (in this case, x).The method for doing this is:Multiply the power of your x term by its coefficie...
AR
Answered by Abigail R. • Maths tutor
4695 Views

Expand and simplify (3x + 5)(2x - 4)

We’ve got to remember that expand means to multiply out, so that word is really important because it tells us what operation to use. The order we multiply in can be remembered using the word FOILS, which sta...
JC
Answered by Jemima C. • Maths tutor
8445 Views