What is the answer to the following calculation with the correct significant digits?

15.27 + 4.037 =

What is the answer to the following calculation with the correct number of significant digits?

(9.7 7.34) 17.1=

What is the answer to the following calculation with the correct significant digits?

12 6.9 =

What is the answer to the following 7.41x10¹² + 6.38x10¹² ?

What is the answer to the following 6.87x10² 6.59x10⁴ ?

What is the answer to the following 6.92x10^-3 4.93x10^-3 ?

1/t - 1/x = 1/y

If x = 4.28 and y = 0.827, what is the value of T?

x/2 - 3x = y

If z = 8.39 and y = 7.16, what is the value of x?

y= x/z/^2

If x = 4.56 and y = 0.886, what is the value of z?

z^2 - x^2 = y If x = 17.5 and y = 38.6, what is the value of z?