Subsitution
4x+y=210
minus 4x both sides
y=210-4x
sub 210-4x for y in other equation
3x+2(210-4x)=195
3x+420-8x=195
-5x+420=195
minus 420 both sides
-5x=-225
divide both sides by -5
x=45
sub back
y=210-4x
y=210-4(45)
y=210-180
y=30
x=45
y=30
(x,y)
(45,30)
You can't deduce the length of a side from the perimeters of a rectangle.
Say that 
and 
are, respectively, the short and long side of the rectangle.
So, we know that
But we can't solve exactly for nor for , unless more information is given.
Answer:
x = 5, -1
Step-by-step explanation:
0 = 3x^2 - 12x - 15 or
3x^2 - 12x - 15 = 0
By solving for x, use the Quadratic Formula.
… x = 5 and/or -1
Answer:
I, I
Step-by-step explanation:
because they can’t be simplified into a whole number they’re irrational.
Answer:
the answer is 5 hours or less which is 5 and the < sign with line under which means they have equal to and less than that so the most hours they can do is 5
Step-by-step explanation:
you have 275
you subtract 50 from 275
275-50=225
divide 225 by 45
225/45=5
