Sum of a number, n and 21...." the sum " means add
n + 21
if n = 8
8 + 21 = 29....the sum is 29
Sin45°=p/h
1/√2=x/4√2
x√2=4√2
x=4
Answer:
D. 2
Step-by-step explanation:
following the graph you can see that -2 on the x line comes across to 2 in y line