The number would be 18.
Half of 18 = 9
Two thirds of 18 = 12
9 + 12 = 21
How is she starting off with five yards of fabric but is using 13 and 72 yards of fabric something isn’t right with this question...
Answer
x≤3/17 or x≥-10
Step-by-step explanation:
Answer:
Triangle 1: x = 80 degrees, acute
Triangle 2: x = 10 degrees, right
Step-by-step explanation:
Triangle 1:
By the Sum of Interior Angles Theorem, all the angles inside the triangle adds up to 180 degrees. So, set up this equation:

Solve for x:

So, x = 80 degrees
Because all the angles are less than 90 degrees, this is an acute triangle.
Triangle 2:
By the Sum of Interior Angles Theorem, all the angles inside the triangle adds up to 180 degrees. So, set up this equation (with the right angle given):

Solve for x:

So, x = 10 degrees
Because there is an angle measuring 90 degrees, this is a right triangle.