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Expand 3(5a-2)

A) 15a - 2 B) 8a - 2 C)9a D)15a - 6 D is correct - multiply each term in the bracket by what is outside the bracket. The other 3 answers show different mistakes, identifying the different areas of improvement.
AJ
Answered by Alex J. • Maths tutor
7149 Views

Solve for x : 2x-15=-2x-7

Bring the x terms onto one side of the equation, and the numbers onto the other, rearranging to get 4x=8divide both sides by 4 to get x=2check answer by subbing x=2 into the equation, such that -11=-11
JP
Answered by Jack P. • Maths tutor
4369 Views

Solve these simultaneous equations and find the values of x and y. Equation 1: 2x + y = 7 Equation 2: 2x - y - 4 = 4 – x

Simultaneous equations are two equations with two unknowns. And they can be solved by either elimination or substitution method.For this example, we will use the elimination method. First of all to make it e...
AC
Answered by Ashwin C. • Maths tutor
4434 Views

What is the best way to provide quotation evidence in my essays?

Within English Literature, most exam boards are looking for evidence that is thoughtful, relevant, and embedded within the sentence. Keeping this in mind, at A-level an ideal length for quotes used to back u...
SM
4715 Views

The genetic code is the sequence of bases in DNA, which is found in chromosomes and is made up of double stranded polynucleotides. Explain what is meant by the term “double-stranded polynucleotide” in relation to DNA.

It is known as double-stranded as there are two strands of DNA joined by hydrogen bonds between the bases and polynucleotide refers to the fact that there are many nucleotides joined by phosphodiester bonds.
AT
Answered by Abishan T. • Biology tutor
2837 Views