10x20x2=$400
All you have to do is find the area of the floor(10x20=200),then you just multiple the area by the cost(200x$2=$400),and that is how you find the cost.
Answer:
![(-1,7)](https://tex.z-dn.net/?f=%28-1%2C7%29)
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Algebra I</u>
- Midpoint Formula:
![(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})](https://tex.z-dn.net/?f=%28%5Cfrac%7Bx_1%2Bx_2%7D%7B2%7D%2C%5Cfrac%7By_1%2By_2%7D%7B2%7D%29)
Step-by-step explanation:
<u>Step 1: Define</u>
Point P(-3, 5)
Point Q(1, 9)
<u>Step 2: Find Midpoint</u>
Simply plug in your coordinates into the midpoint formula to find midpoint
- Substitute {MF]:
![(\frac{-3+1}{2},\frac{5+9}{2})](https://tex.z-dn.net/?f=%28%5Cfrac%7B-3%2B1%7D%7B2%7D%2C%5Cfrac%7B5%2B9%7D%7B2%7D%29)
- Add:
![(\frac{-2}{2},\frac{14}{2})](https://tex.z-dn.net/?f=%28%5Cfrac%7B-2%7D%7B2%7D%2C%5Cfrac%7B14%7D%7B2%7D%29)
- Divide:
![(-1,7)](https://tex.z-dn.net/?f=%28-1%2C7%29)
We will use the tangent ratio since we have the adjacent side to the 65 degrees and we need to find the opposite side to the 65 degrees.
Tan α = opp/adj
Tan 65 = x/30
To solve, multiply both sides by 30.
30 Tan65 = x
x = 64 ft
To solve this problem, we simply have to use ratio and
proportion. We know that for every 5 cm, we have 1 m therefore the factor to
use is:
5 cm / 1 m
SO for a table length of 1.4 m, the model length should
be:
model = (5 cm / 1 m) * 1.4 m
model = 7 cm
Answer:
7 cm
I know it’s A. But not sure about the fraction part I’ll solve it later for you