Answer: x = +4 or -4
Step-by-step explanation:
x² - 1 = 15
x² = 15 + 1
x² = 16
Therefore, to solve for x we take the square root of both side
√x² = +/-√16
x² = +/-4
so, x = +4 or -4
Speed=distance/time
8=distance/15
120km= distance
Answer:
Step-by-step explanation:
Answer:
a
Step-by-step explanation: