Answer:
Hello!!! Princess Sakura here ^^
Step-by-step explanation:
When you combine like terms you see the ones that are similar then you add or subtract, depends on what the signs are. For this one -7x is similar to x so in this case you would add x to the -7x which will give you -6x.
D. d = 5
d = d² - d¹
= 5 - 0
= 5
d = d³ - d⁴
= 10 - 5
d = dⁿ - dⁿ-¹
1,311
Hey Ive taken this assesment. The answer is 55
x=60