Answer:
(a) Step 2. 9x -12 = 13 +2x
Step-by-step explanation:
The distributive property says a factor outside parentheses multiplies each term inside parentheses. It is an error to do addition of the factor, or to miss multiplying a term.
In Step 2 of this "solution", the factor of 3 is erroneously <em>added</em> to each coefficent inside parentheses. It should be <em>multiplied</em>.
Correct Step 2: 9x -12 = 13 +2x
__
The rest of the solution should be ...
Step 3: 9x -2x = 13 +12
Step 4: 7x = 25
Step 5: x = 25/7
___
<em>Check</em>
3(3(25/7) -4) = 8 + 2(25/7) +5
3((75 -28)/7) = 13 +50/7
141/7 = 141/7 . . . . . answer checks OK
Answer:
16oz=1lbs
First you need to see how many ounces equals three pounds, so you wanna go 16*3=48
You bought 48 ounces
You now take 48/2=24
You can fill 24 cracks with 3 pounds of cement
Step-by-step explanation:
Answer:
hey your answer can be 10 because the oppisite of 56 is 65 and 7x 10 is 70
Step-by-step explanation:
1. 3/5
2. 15
3. 1/15
4. 1 2/3
