Answer:
Step-by-step explanation:
3x - 8 + 5x + 10 = 90
8x + 2 = 90
8x = 88
x = 11
3(11) - 8 = 33 - 8 = 25 for <A
5(11) + 10 = 55 + 10 = 65 for<B
Answer:
20.4
Step-by-step explanation:
If you are using D = r × t
10.2 = 0.5(t)
10.2/0.5 = t
20.4 = t
Answer:
24
Step-by-step explanation:
13^2 + 2 * 13 * n + n^2 = 18^2
169 + 26n + n^2 = 324
26n + n^2 = 324 - 169
26n + n^2 = 155
n^2 + 26n - 155 = 0
(n - 5)(n + 31) = 0
n - 5 = 0
n = 5
n + 31 = 0
n = -31.....not this one because it is negative
so n = 5 <===
