Answer:
We are to find the error made by Sadie and then find the correct simplification.
The error Sadie made is that she wrote as instead of .
The square root of is and so she could have further simplified.
The correct simplification is shown below:
Answer:
2,4,1
Step-by-step explanation:
Answer:
To figure this out we need to balance out the equation.
When a number is right next a variable, it is considered as multiplication. So, to balance the equation we need to divide.
Step-by-step explanation:
1.2/1.2 =x
1.2/6=5
Answer; x=5
Answer:
The number is 2
Step-by-step explanation:
Twice a number (z) = 2*z = 2z
Twice a number (z) added to 21 = 2z + 21
9 times the number added to 7 = 9z + 7
9z + 7 = 2z + 21
Subtract 2z form both sides
9z - 2z + 7 = 21
7z + 7 = 21
Subtract 7 from both sides
7z = 21 - 7
7z = 14
Divide both sides by 7
z = 14/7
z = 2