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How do I solve 3x + y = 11 & 2x + y = 8?

In order to solve this set of simultaneous equations, we will rearrange each equation to use substitution. The aim of this problem is to find out what the value of x and y is. Let's rearrange equation 1 and ...
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Answered by Naomi O. • Maths tutor
15056 Views

How can I factorise a quadratic equation?

A quadratic equation is an equation of the form y = a x 2 + b x + c where a, b and c are constants (for example 5, -2 or 0). To "solve" a quadratic equation we are finding the values of x that sati...
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Answered by Tom R. • Maths tutor
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Describe the structure of DNA and where it is found inside a human cell

The DNA molecule is found within the nucleus of the cell, organised into chromosomes. In humans, there are 46 chromosomes. The DNA molecule consists of organic bases joined by sugars and phosphate molecules.
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Answered by Kelly T. • Biology tutor
8238 Views

Was Augustus' Foreign Policy after 27BC peaceful?

After the First so called Constitutional Settlement in 27BC where Augustus was given his name and attempted to return powers on account of his ill health, the Senate had ipso facto given Augustus even more p...
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First organisms on Earth were fully aquatic. About 460 mya a lineage of algae moved onto land and gradually adapted to air and soil. Name two evolutionary problems that first land plants faced when transitioning from water to land?

Examples of physiological problems and the adaptations of plants: Body support. As organisms in water face lower pressure than in air, algae did not need to have composite body parts. When moved onto land, p...
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Answered by Ivana L. • Science tutor
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