Answer:
90
Step-by-step explanation:
Evaluate x^2 + 2 x^2 + 3 x^2 + 4 x^2 where x = 3:
x^2 + 2 x^2 + 3 x^2 + 4 x^2 = 3^2 + 2×3^2 + 3×3^2 + 4×3^2
3^2 = 9:
3^2 + 2×9 + 3×3^2 + 4×3^2
3^2 = 9:
3^2 + 2×9 + 3×9 + 4×3^2
3^2 = 9:
3^2 + 2×9 + 3×9 + 4×9
3^2 = 9:
9 + 2×9 + 3×9 + 4×9
2×9 = 18:
9 + 18 + 3×9 + 4×9
3×9 = 27:
9 + 18 + 27 + 4×9
4×9 = 36:
9 + 18 + 27 + 36
| 3 |
| 3 | 6
| 2 | 7
| 1 | 8
+ | | 9
| 9 | 0:
Answer: 90
-4h+16=-16
-16=-16
-4h=-32
Divide by -4
H=8
D is the answer
We can use the following formula in order to solve all the questions:
![\begin{gathered} \rho=\frac{m}{v} \\ \text{where:} \\ \rho=Density \\ m=mass \\ v=volume \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20%5Crho%3D%5Cfrac%7Bm%7D%7Bv%7D%20%5C%5C%20%5Ctext%7Bwhere%3A%7D%20%5C%5C%20%5Crho%3DDensity%20%5C%5C%20m%3Dmass%20%5C%5C%20v%3Dvolume%20%5Cend%7Bgathered%7D)
2)
![\begin{gathered} v=\frac{m}{\rho} \\ m=1\operatorname{kg}=1000g \\ \rho=\frac{13.6g}{ml} \\ v=\frac{1250}{17}ml\approx73.53ml \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20v%3D%5Cfrac%7Bm%7D%7B%5Crho%7D%20%5C%5C%20m%3D1%5Coperatorname%7Bkg%7D%3D1000g%20%5C%5C%20%5Crho%3D%5Cfrac%7B13.6g%7D%7Bml%7D%20%5C%5C%20v%3D%5Cfrac%7B1250%7D%7B17%7Dml%5Capprox73.53ml%20%5Cend%7Bgathered%7D)
3)
Here is one of the ways, first you are going to convert the 2% into a fraction.
2% = 0.02
Next we are going to multiply 0.02 * 57 = 1.14
Now we are going to add 1.14 to 57 to find the total cost with including the tax.
1.14 + 57 = 58.14
= $ 58.14