7/3u = 21
Multiply both sides by 3
7u = 63
Divide both sides by 7
u = 9
Answer:3 & 4
Step-by-step explanation: those are the two with multiplication/division
Answer:
there are many answers. The simplest one is x=1 y=3
Step-by-step explanation:
In this item, it can be seen that from an expression of,
(4 + 5i) + (-3 + 7i)
Aiko transformed the equation by factoring out the i's from the expression and wrote it as,
(4 + 5)i + (-3 + 7)i
Now this is wrong because i there is not a variable but a notation that 5 and 7 are imaginary numbers. In fact, she cannot factor out the i's because it is not present in both -3 and 4. The answer therefore to this item is the last sentence, "Aiko incorrectly used the distributive property by combining ..."
