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A rectangle of perimeter 45cm has sides of length x and x+4. Work out the value of x.

First, draw a diagram to help visualise the problem. Next, write out the full sum: x + x + (x+4) + (x+4) = 45 This simplifies to: 2x + 2(x+4) = 45 Which expands to: 2x + 2x + 8 =45 This simplifies to: 4x + 8...
IR
Answered by Imogen R. • Maths tutor
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Define an isotope.

Compounds with the same molecular formula but have different structural formulas.
SS
Answered by Shivani S. • Chemistry tutor
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Explain the similarities and differences between plant and animal cells structure and shape (may include use of a diagram and bullet points are accepted).

The similarities are:Cell cytoplasmNucleusCell membraneMitochondriaRibosomesStructures unique to plant cells (with a few exceptions):ChloroplastsCell wallsLarge permanent vacuoleAnimal cells tend to be varia...
JL
Answered by Jessica L. • Biology tutor
4949 Views

The point P has coordinates (3, 4) The point Q has coordinates (a, b) A line perpendicular to PQ is given by the equation 3x + 2y = 7 Find an expression for b in terms of a.

The point P has coordinates (3, 4) The point Q has coordinates ( a , b )A line perpendicular to PQ is given by the equation 3 x + 2 y = 7 Find an expression for b in terms of a . let l be the gradient for th...
AI
Answered by Abi I. • Maths tutor
10770 Views

Increase 32 million by 4%. Give your answer correct to the nearest million.

(32,000,000)*1.04= 33,280,000= 33,000,000 to the nearest million.
SB
Answered by Simona B. • Maths tutor
10496 Views