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Solve the two simultaneous equations X2 +2Y2= 18 and X - Y = 3

1) X² +2Y²= 182) X - Y = 3
Rearrange 2) in the form X=3-Y then substitute in to 1); (3-y)²+2Y²=18, this is your new equation 39+3Y+3Y+Y²+2Y^...

Answered by Rebecca C. • Maths tutor

4251 Views

at a shop in the US tax is added onto the price of an item at the till. this shop adds 5.7% of the items value to the total cost. if you buy a ball priced as $15, how much will you have to pay ?

0.057 x 15 = 0.855 total = 15 + 0.988 = 15.855

Answered by Merlin B. • Maths tutor

2828 Views

a solar cell of area 2m^2 has maximum a power output per unit area of 20W/m^2 . if four solar cells are used together at once, how much energy is release in 2 mins at max power output?

max output of 1 cell = 20x2= 40w , so four cells gives 4x40 = 160w so if it gives 160 joules a second then in 2 mins it will put out 160 x (2x60) = 19200 joules

Answered by Merlin B. • Physics tutor

1736 Views

What is the difference between cellular respiration and breathing (respiration)?

Respiration (breathing) is the way your body gets oxygen into the lungs from the air outside.Cellular respiration describes how your cells make ATP - a molecule used to provide energy for chemical reactio...

Answered by Harry C. • Biology tutor

29660 Views

Translate the following sentence into Italian: I should have known that it was not the right choice. This work does not inspire me, therefore I am going to change career path. I hope that my parents will be proud of me, instead of judging me.

Avrei dovuto sapere che non fosse la scelta giusta. Questo lavoro non mi ispira, dunque mi conviene cambiare mestiere. Spero che i miei genitori siano felici per me, invece di giudicarmi.

Answered by Greta P. • Italian tutor

1513 Views