Top answers

solve the simultaneous equations: 3x + 5y = 4 ; 7x - 3y = 8

first recognise that if you double the first equation the both equations will be equal to 8.so now we have 6x + 10y = 8 ; 7x - 3y = 8now we can set the equations equal to each other to get 6x + 10y = 7x - 3y...
EW
Answered by Elizabeth W. • Maths tutor
4397 Views

Find the volume of a right angled triangular prism with an angle of 28 degrees, hypotenuse of length 10 cm, and projected length of 12.5 cm. Give your answer in cm^3, to three significant figures.

The area of a prism is found by multiplying the area of the end face by the projected length. The adjacent and opposite side lengths of the triangle can be found using SOHCAHTOA. sin(28)= opposite/10, theref...
LM
Answered by Lily M. • Maths tutor
3821 Views

How do vaccines prevent certain diseases?

Vaccines introduce a dead, inactive or altered form of a pathogen (a microbe that causes an infectious disease) into the body. These pathogens have antigens, which have a shape specific to that pathogen. The...
AM
Answered by Alice M. • Biology tutor
3123 Views

What is a vector?

A vector describes a movement from one point to another.a column vector shows both the direction and the magnitude of this movement.the top number describes the horizontal movement.the bottom number describe...
TH
Answered by Tom H. • Maths tutor
6448 Views

How does JB Priestly explore Responsibility in An Inspector Calls?

Consider: the ideas about responsibility in An Inspector Calls how Priestley presents these ideas by the ways he writes. Priestley explores ideas about responsibility through the way the Birlings behave towa...
EC
37556 Views