12 pens and 5 rulers cost $70 while 3 pens and 25 rulers cost $65.Find the price of each pen and ruler. Let x and y be the price of the pen and ruler respectively.
Use the fact that 12 pens and 5 rulers cost $70 to set up Equation 1.
Write the equation in the form ax + by = C, where a is positive.

(2x + 16) + (x) = 180

step-by-step explanation:

given,

abcd is a quadrilateral inscribed in a circle

angle a is labeled x plus 16, (x + 16)

angle b is labeled x degrees, (x)

angle c is labeled 6x minus 4, (6x – 4)

angle d is labeled 2x plus 16, (2x + 16)

what equation can be used to solve for angle b?

we know that the sum of the opposite angles of a simple quadrilateral inscribed in a circle is 180 degrees.

angle b is opposite angle d

therefore, angle b + angle d = 180

(x) + (2x + 16) = 180 

same as (2x + 16) + (x) = 180

first one because it can't have a fraction in it

step-by-step explanation:

$6.42

step-by-step explanation: