30 + 70 + D = 180
100 + D = 180
D = 80°
account b has 2.6% more interest than account a
Answer:
x = -4
Step-by-step explanation:
The principal square root of 49 is just
7 because 7 times 7 is 49.
It can not be -7 because
a principle square root cannot be negative.
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