868 is about 870, and 28 is about 30, so your expression would be 870 divided by 30 which would be 29 and the actual answer is 31, so your estimate would be close to your actual answer.
Answer:
B.) 113°
Step-by-step explanation:
In the isosceles trapezoid, angles T and S are congruent. Find the value of x:

Subtract 4x from both sides:

Add 38 to both sides:

Divide both sides by 3:

x is equal to 15. Now substitute the value of x into the one of the expressions:

or

The angles T and S are 67°.
The angles of a trapezoid will always add up to a total of 360°, so add the angles T and S:

Subtract their total from 360:

The total of the angles Q and R is 226°. Since this is an isosceles trapezoid, those two angles are also congruent. Divide the value by 2:

Angle R is 113°.
Done.
-3 1/2 = 1/2x + 1/2x + x
- 7/2 = 2x
(-7/2) / 2 = x
-7/2 * 1/2 = x
- 7/4 (or - 1 3/4) = x
Answer:
30% increase
Step-by-step explanation:
30 is 30 percent of 100 so the answer is 30 percent increase