Answer:
x = 12
Step-by-step explanation:
Let's use the distributive rule first for both 5(x - 1) and 7(x + 1). When using the distributive rule to expand parentheses, remember to find the sum of the product of the "outside number" with each of the "inside numbers".
5(x - 1): 5 is the outside number and both x and -1 are the inside numbers.
5 * x + 5 * (-1) = 5x - 5
7(x + 1): 7 is the outside number and both x and 1 are the inside numbers.
7 * x + 7 * 1 = 7x + 7
Now, we can put these back into the equation:
5x - 5 + 3x = 7x + 7
Combine all the x's and the constants:
8x - 5 = 7x + 7
x = 7 + 5 = 12
Thus, the answer is x = 12.
Hope this helps!
Answer:
Fox is faster by 7 MPH
Step-by-step explanation:
1. determine how fast each animal runs per hour
rabbit = 35 MPH
fox = 21 per half hour (multiply by 2 for hour) 21*2=42 MPH
2. Subtract rabbits speed (35) from foxs speed (42)
42-35= 7 mph
Answer:
4 bags, or 4 1/4 bags
Step-by-step explanation:
change 3 1/2 into a improper fraction, then change it to have a common denominator as 3/4. the expression would then be (14/4 + 3/4) divided by 1/2. 17/4 divided by 1/2 is 4 1/4. it would depend if they meant to fill the whole bag.
-10/16, -20/32. I hope my answer helps. :)