Answer:
B = 7
Step-by-step explanation:
Checking the result of B
- 5x² × 7
= - 35
= - 35
← Correct
2x + x = 15
3x= 15
x= 5
2x
2(5)= 10
Jim has 10 cards.
the error was they forgot to make 18 a negative
Answer:
7.5
Step-by-step explanation:
Because Noah has five dollars, 100% of 5 is 5, and 50% of 5 is 2.5 so Diego has 7.5 dollars.