I thought I already answered this but its -10
Answer:
a = 70°, b = 140°
Step-by-step explanation:
use alternate interior angles
The interior angles of a straight line are 180°
a = 180°-110° = 70°
b = 180°-40° = 140°
//I'm sorry, but I'm not very fluent in English.
The radius of a circle is the distance from the center point of a circle to the outer edge of the circle. The diameter is the distance between one point on the outside of a circle and a point on the other side, and the diameter passes through the center point.
Therefore, the diameter is just twice the radius.
We know the radius is 3.5 cm, so we can just multiply:
3.5 * 2 = 7
The diameter of a circle with a radius of 3.5 cm is 7 cm.
Hope that helped! =)
Karen has $30, Rafael has $75 and Shen has $25.
Step-by-step explanation:
Given,
Total amount they have = $130
Let,
Amount of Karen = x
Amount of Rafael = y
Amount of Shen = z
According to given statement;
x+y+z=130 Eqn 1
Shen has $5 less than what Karen have.
z = x-5 Eqn 2
Rafael has 3 times what Shen has;
y = 3z Eqn 3
Putting value of z from Eqn 2 in Eqn 3

Putting value of y and z from Eqn 4 and 2 in Eqn 1

Dividing both sides by 5

Putting x = 30 in Eqn 2

Putting z=25 in Eqn 3

Karen has $30, Rafael has $75 and Shen has $25.
Keywords: linear equations, substitution method
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