15%=3
5%=1
5(20)=100
1(20)=20
So, there are 20 students in the class.
Answer:
s = 8t
Step-by-step explanation:
.............................
Not sure what form you want this in:
Simplified this is 4x+4y
Factorised this is 4(x+y)
9514 1404 393
Answer:
∠B = 53°
∠C = 127°
∠D = 127°
Step-by-step explanation:
The trapezoid is isosceles, as indicated by the hash marks on sides AD and BC. This means it is symmetrical about the vertical center-line. Angles on the right will have the same measures as the symmetrical angles on the left.
So, you know immediately that ∠B = ∠A = 53°.
Because AB ║ DC, ∠A and ∠D are supplementary. That is, ...
∠D = ∠C = 180° -53°
∠D = ∠C = 127°
