Answer:
c
Step-by-step explanation:
Answer:
Option A.
Step-by-step explanation:
The given equation is
Step 1: Multiply both sides by (x-4).
Step 2: Multiply both sides by 7.
Step 3: Using distributive property.
Step 4: Isolate all terms on one side.
Step 5: Find factors by splitting the middle term.
Step 6: Using zero product property, we get
It means student solved the equation correctly.
Therefore, the correct option is A.
Answer:
4
Step-by-step explanation:
because 2 1/2 times 4=10
Answer:
The variable d stands for how many calories she used.
Step-by-step explanation:
the problem says that she uses 1 calorie per minute while walking, and then it says that she walked 12 minutes. 12×1= 12 calories
d=12 calories which equals to the 12 minutes she walked