Answer:
7/10
Step-by-step explanation:
good look just put them in decimal and you will know
-5y^2 + 2y + 2 = 0
y = -2 ± ✓4 - 4*-5*2. /. -10
y = -2 ± ✓44. / -10
y = -1 ± ✓11. / -5
(-1+✓11)/-5. and (-1-✓11)/-5
Solution: We know that:
Paul and Brett went to math class and were given the same expression to simplify. The expression they were given was 6 + 12 divided by 2(3) + 1.
Looking at the solution's by Paul and Brett, we clearly see that the Paul made a mistake at step 3.
6 + 12 ÷ 2(3) + 1
6 + 12 ÷ 6 + 1 Correct
18 ÷ 6 + 1 Incorrect It should have been 6 + 2 +1
According to order of operation's rule, division needs to done before addition.
Therefore, solution by Paul carries a mistake, while the solution by Brett is correct.
The first one means that for every dollar....there's 7.25% tax. got it yet?
Answer:
A) ![E(w)=450+0.10w](https://tex.z-dn.net/?f=E%28w%29%3D450%2B0.10w)
B) $1200
Step-by-step explanation:
Let w represent employee's weekly sales and
be total weekly earnings.
We have been given that a phone store employee earns a salary of $450 per week plus 10% commission on her weekly sales.
A) The total weekly earnings of employee would be weekly salary plus 10% of weekly sales.
10% of weekly sales, w, would be ![\frac{10}{100}*w=0.10w](https://tex.z-dn.net/?f=%5Cfrac%7B10%7D%7B100%7D%2Aw%3D0.10w)
![E(w)=450+0.10w](https://tex.z-dn.net/?f=E%28w%29%3D450%2B0.10w)
Therefore, the function
models the employee's weekly earnings.
B) To find the weekly sales in the week, when employee earned $570, we will substitute
in our formula and solve for w as:
![570=450+0.10w](https://tex.z-dn.net/?f=570%3D450%2B0.10w)
![570-450=450-450+0.10w](https://tex.z-dn.net/?f=570-450%3D450-450%2B0.10w)
![120=0.10w](https://tex.z-dn.net/?f=120%3D0.10w)
![0.10w=120](https://tex.z-dn.net/?f=0.10w%3D120)
![\frac{0.10w}{0.10}=\frac{120}{0.10}](https://tex.z-dn.net/?f=%5Cfrac%7B0.10w%7D%7B0.10%7D%3D%5Cfrac%7B120%7D%7B0.10%7D)
![x=1200](https://tex.z-dn.net/?f=x%3D1200)
Therefore, the amount of employee's weekly sales was $1200.