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What is the name of the valve responsible for preventing blood flow from the left ventricle to the left atrium of the heart?

Mitral Valve The mitral valve is a large 'flap' between the two left chambers of the heart. When this is open, it allows oxygenated blood to fill the left ventricle of the heart from the atrium. When the hea...
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Answered by Ella H. • Biology tutor
3241 Views

Rewrite these sentences using pronouns.

¿Has plantado las flores? Compramos los zapatos He buscado la información en el red. ANSWERS ¿Las has plantado? Los compramos La he buscado en el red EXPLANATION. The noun which is the direct object of the v...
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Answered by Hannah C. • Spanish tutor
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A 4kg bag of rice costs £3.20 and a 6kg bag of rice costs £5.80. Which bag of rice is the best value for money? Show all your working.

To work out which bag is best value for money you have to work out the price of each bag per kg. To do this you must divide the price of the bag by the number of kg's it weighs. I.e. 3.20/4 = 80p per kg, 5.8...
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Answered by Yasha N. • Maths tutor
4939 Views

How do I factorise a quadratic equation?

To factorise an equation is to put it into (usually two) brackets in the form (x+a)(x+b), where a and b are integers, which multiply out to make the original equation. So whenever you see the word factorise,...
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Answered by Juliette H. • Maths tutor
3975 Views

What is the domain and what is the range

The domain is a set of all possible values for variables that are input in to a function. The range of a funciton is a set of values that may be the output of a funciton. For one to one functions, the invers...
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Answered by Tom H. • Maths tutor
13393 Views