HELP GEOMETRY 15 POINTS

x = 10

Step-by-step explanation:

The angles of a triangle must add up to 180 degrees. We know that all the angles on this triangle are the same. 180 ÷ 3 = 60. 5x + 10 has to be equal to 60.

Then it is simple algebra

5x + 10 = 60

     - 10  - 10

5x = 50

÷5    ÷5

x = 10

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3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold

point a is the center of the circle that passes through points e, f, and g and the center of the circle that passes through points x, y, and z.