7/5=s/g multiply both sides by g
7g/5=s multiply both sides by 5/7
g=5s/7
We are then told that:
g+30=s-30 subtract 30 from both sides
g=s-60, and from earlier g=5s/7, and g=g so we can say:
s-60=5s/7 multiply both sides by 7
7s-420=5s subtract 5s from both sides
2s-420=0 add 420 to both sides
2s=420 divide both sides by 2
s=210, and since g=s-60
g=150
So Simon had 210 pencils and Greg had 150 pencils.
Check..
s:g=210:150=7:5
and
s-30=g+30
210-30=150+30
180=180
Answer:
y=-1/6x+2/3
Step-by-step explanation:
(1-0)/(-2-4)=-1/6 slope
y-1=-1/6(x+2)
y-1 = - 1/6x-1/3
y=-1/6x+2/3
Answer:
let the scone be x and the large coffees be y.
7x+4y=$25.76-----equ(I)
2x+5y=$14.92-----equ(2)
make x the subject of the formulae in equation(ii).
x=$14.92/2-5y
x=7.46-5y
Answer:
2.04 miles per hour
Step-by-step explanation:
Given
Noel


Casey


Required
The rate at which the distance increases
Their movement forms a right triangle and the distance between them is the hypotenuse.
At
and 
The distance between them is:




After 1 hour, their new position is:
New = Old + Rate * Time


And:


So, the distance between them is now:




The rate of change is:


