What is the value of y and x in the two equations .50x + .75y= 20 & x + y= 11.50. show me work , enjoy ur 30 points.

x = -45.5

y=57

Step-by-step explanation:

.50x + .75y= 20

x + y= 11.50

Multiply the second equation by -1/2 so we can eliminate x

-.5 (x + y= 11.50)

-.5x - .5 y = -5.75

Add this equation to the first equation

-.5x - .5 y = -5.75

.50x + .75y= 20

.25y = 14.25

Divide by .25

.25y/.25 = 14.25/.25

y =57

Now we still need to find x

x + y= 11.50

x + 57 = 11.5

Subtract 57 from each side

x+57-57 = 11.5-57

x = 45.5

-10i^2-4i

step-by-step explanation:

evaluate for p=2,q=5i

(2−4)(2+5i)i

(2−4)(2+5i)i

=−10i2−4i

just take the area of the square and then the area of the circle then subtract the circle area from the squares area

step-by-step explanation: