Acell phone plan charges $39.95 a month plus 15 cents
per text message sent and 15 cents per text message
received. using sto represent the number of text
messages sent in one month and rto represent the
number of text messages received in one month, the
following equation can be used to calculate the total
monthly cost, c.
c= 39.95 + 0.15(s+ r)
if it is known that the total monthly cost is $53.45 and 63
text messages were received, solve for s, the total
number of text messages sent.

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.

5/20 so 25%

step-by-step explanation:

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system