The three inside angles of a triangle equal 180 degrees.
All the 3 given angles together to equal 180 to solve for x, then calculate angle A.
x + (x-8) +(3x+13) = 180
Simplify the left side by combing like terms:
5x +5 = 180
Subtract 5 from each side:
5x = 175
Divide both sides by 5:
x = 175/5
x = 35
Now x is known, replace x in the equation for angle A:
3x+13 =
3(35) +13 =
105+13 = 118
Angle A = 118 degrees.
Answer:
Step-by-step explanation: i think b but i could be wrong
Answer:
478/16
Step-by-step explanation:
28x8=224
224+15=239
8x2=16
239x2=478
478/16
Answer:
9 4/9
Step-by-step explanation:
9 x 9 = 81
you have 4 left over
place the 4 over 9 and that is your answer.
Answer:
(-4,-11)
Step-by-step explanation:
Given an equation of a circle
To find the centre and radius of the circle.
We group x terms to gether and y terms to gether first.
Now completion of squares method is used for both x and y.
Thus we find that the centre = (-4,-11) and radius
= 10