Answer:
of in math means multiply so I would assume its asking you to multiply 5/7 and 1/7. that would give you 28/3 which simplified gives you 7.
it's the only one that hasn't been with a positive 2
Answer:
x = 15.49
Step-by-step explanation:
a2+b2=c2
11^2+x^2=19^2
121 =x^2 = 361
x^2 = 240
x = 15.49
Answer:

Step-by-step explanation:
Based on the exponent rule, subtract the exponent with the numerator and the denominator.
So, subtract 3 and -8
3-(-8)
3+8
11

520 - 50 = ?
520 - 50 = 470
500 is the best estimate