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Solve the simultaneous equations y=x-5 and 10y=2x+6 by elimination, and by substitution.

Elimination: Multiply equation (eqn) 1 by 2 : 2y=2x-10 Subtract modified eqn 1 from 2 : 8y=16 Divide through by 8 : y=2 Sub y=2 into eqn 1 or 2 and rearrange to find : x=7 Subsitution: Sub eqn 1 into eqn 2 :...
JR
Answered by Jack R. • Maths tutor
4162 Views

what does a value shared in the ratio 2:3 mean?

this means that there are 5 parts to share out altogether. (2+3=5) So you take the value you wish to share and divide it by 5. once you've divided the value by five, to share in the ratio 2:3 simply means to...
ET
Answered by Ewan-James T. • Maths tutor
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A force is applied to a box of mass 2kg so that is accelerates at 2ms^-2. Find the force acting on the box and thus calculate the work done in moving the box 10m in the direction of the force.

Force=(mass)x(acceleration) F=2x2=4N Work done=(Force)x(distance) W=4x10=40J
ET
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Sandeep has been fasting and is not drinking water during the daytime. Name the hormone and explain the sequence of events involving this hormone, that occur during the day to maintain Sandeep's water balance.

ADH (Anti-diuretic hormone). First his blood plasma becomes more concentrated. This is detected by receptors in the hypothalamus which stimulates the pituitary gland to secrete ADH. ADH enters the blood stre...
NB
Answered by Nathan B. • Biology tutor
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What is the equation of an accelerated body moving in one dimension?

x=x 0 +v 0 t+1/2at 2
PA
Answered by Pablo A. • Physics tutor
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