Answer:If Mary spent half of her allowance the equation will begin with 1/2x or 0.5x where x is her allowance and 0.5 is half of her allowance spent. Mary also earned 7 dollars by washing the car so this will be added to her allowance spent.
The problem says that after Mary has spent half of her allowance at the movies she was left with 18 dollars so that means that the equation must be equal to 18.
The equation you want to set up is
0.5x+7=18
Where, 18-7=11
0.5x=11
11/.5 = x
x = $22
Thus, Mary has a weekly allowance of 22 dollars.
Step-by-step explanation:
Answer:
Step-by-step explanation:
0=4 ther is just one solution
If has to be a solution of the equation, just plug it in:
So, the solutions of
are
Answer:
-2x2a • (2x2 + 4b - 5)
Step-by-step explanation:
Step by step solution :
Step 1 :
Equation at the end of step 1 :
2xa • ((-4xb - 2x3) + 5x)
Step 2 :
Step 3 :
Pulling out like terms :
3.1 Pull out like factors :
-2x3 - 4xb + 5x = -x • (2x2 + 4b - 5)
Trying to factor a multi variable polynomial :
3.2 Factoring 2x2 + 4b - 5
Try to factor this multi-variable trinomial using trial and error
Factorization fails
Multiplying exponential expressions :
3.3 x1 multiplied by x1 = x(1 + 1) = x2
Final result :
-2x2a • (2x2 + 4b - 5)