we know that
If two angles are congruent, that means, that the angles are equal
so
the measure of an angle congruent to a 47° is 47°
Since we know that 1 foot is 12 inches, we can determine that a half of a foot is 6 inches. We have 7 feet, so we need to multiply 12 and 7 to find 7 feet in inches. 12*7 is 84, but we still have to add in our additional 6 inches. When we add 6 to 84, we get 90. Therefore, the classroom door is 90 inches tall.
327421537566 this is just getting repetitive <span />
Subtract the 18 from the 78 then multiply both sides by -1, then divide by 5.
Difference is subtraction so 673-80 = 593. 593 is your answer. ;) Hope I helped.