Answer:
a = -8
Step-by-step explanation:
you can solve this proportion by cross-multiplying:
4(a + 9) = -1(a + 4)
now distribute to eliminate parentheses
4a + 36 = -1a - 4
5a + 36 = -4
5a = -40
a = -8
((-3)^2)^3
The rule for raising and exponent to another exponent is:
(a^b)^c=a^(b*c) so:
((-3)^2)^3
(-3)^(2*3)
(-3)^6
1/16 converted into mm is 1.5875 mm
