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Solve the linear simultaneous equations: 3x + 5y = 45, 2x - 9y = -7

x = 10, y = 3. From the second equation, we have x = (9y - 7)/2. Substituting this expression for x into the first equation gives 3(9y - 7)/2 + 5y = 45. 3(9y - 7) + 10y = 90. 27y - 21 + 10y = 90. 37y = 111. ...
CW
Answered by Cameron W. • Maths tutor
4079 Views

"El alcalde de tu ciudad ha prohibido las cadenas de comida rápida. Tú no estás seguro/a de si esta medida tan extrema es apropiada y decides entrevistarlo. Escribe el texto de la entrevista que será publicada en el periódico local."

This question is taken from Section A of a Spanish HL Paper 2, and roughly translates to: "The mayor of your city has banned fast food chains. You're not sure if such an extreme measure is appropriate a...
TM
Answered by Thomas M. • Spanish tutor
2219 Views

Explain the Cardiac Cycle

Deoxygenate blood from the body drains into the right atrium of the heart through the superior and inferior vena cave vessels. When the atria contract, blood is squeezed through the tricuspid valve into the ...
SP
3703 Views

integrate xcosx

use integration by parts
SB
Answered by Sebastian B. • Maths tutor
3940 Views

a. Explain the differences between servos and servi in the following sentences. b. Give the person, number and tense of the verbs percussit and effugerunt.

cotidie dominus servos percussit quod crudelis erat. Tandem duo trepidi servi effugerunt. a. Servos is the masculine accusative plural of servus, whilst servi is the masculine nominative plural. Servos is ac...
AM
Answered by Andi M. • Latin tutor
7745 Views