Solve the system of equations.
\begin{aligned} & -5x+2y = 9 & y=7x \end{aligned}


−5x+2y=9
y=7x


x=x=x, equals
y=y=y, equals

Solution:

Given system of equations are:

-5x + 2y = 9 eqn 1

y = 7x eqn 2

We have to solve the system of equations

Substitute eqn 2 in eqn 1

-5x + 2(7x) = 9

-5x + 14x = 9

Combine the like terms : -5x + 14x = 9x

Therefore,

9x = 9

Divide both sides by 9

Substitute x = 1 in eqn 2

y = 7(1)

Thus solution is (x, y) = (1, 7)

definition: a circle is the  set of all points in a plane that are equidistant  from a given  point  called the center of the circle. we use the symbol ⊙ to represent a circle. the a line segment from the center of the circle to  any point  on the circle is a radius of the circle.

step-by-step explanation:

i googled it and this is what i got i don't know how it is. sorry.

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70