Answer: 21n + 70= 21n plus 70
Step-by-step explanation:
step by step explanation the n is 21 plus 70 plus then you have to do equals on the sign 21n in the box where it says n add 21 then add 70 and then add a = sign and your done
The Area of a triangle is 1/2 base×height So 8×3/2=12
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