Answer:
![7a^{2} +20](https://tex.z-dn.net/?f=7a%5E%7B2%7D%20%2B20)
Step-by-step explanation:
Given: Area of one cupboard= ![3a^{2} -5y+15](https://tex.z-dn.net/?f=3a%5E%7B2%7D%20-5y%2B15)
Area of second cupboard= ![4a^{2} +5y+5](https://tex.z-dn.net/?f=4a%5E%7B2%7D%20%2B5y%2B5)
As per question, carpenter need to determine the amount of plywood required for two cupboard.
Lets, add the area of two cupboard to know the amount of plywood required.
∴
- Area of first cupboard.
- Area of second cupboard.
Adding both the area;
![(3a^{2} -5y+15)+(4a^{2} +5y+5)](https://tex.z-dn.net/?f=%283a%5E%7B2%7D%20-5y%2B15%29%2B%284a%5E%7B2%7D%20%2B5y%2B5%29)
Now, opening the parenthesis
![3a^{2} -5y+15+4a^{2} +5y+5](https://tex.z-dn.net/?f=3a%5E%7B2%7D%20-5y%2B15%2B4a%5E%7B2%7D%20%2B5y%2B5)
we will get
.
∴ Total area of cupboard= ![7a^{2} +20](https://tex.z-dn.net/?f=7a%5E%7B2%7D%20%2B20)
Answer:
2-3x7=-7
Step-by-step explanation:
Answer:
y = -5
General Formulas and Concepts:
<u>Pre-Alg</u>
- Order of Operations: BPEMDAS
- Equality Properties
Step-by-step explanation:
<u>Step 1: Define equation</u>
-9 = 2(18) + 9y
<u>Step 2: Solve for </u><em><u>y</u></em>
- Multiply: -9 = 36 + 9y
- Subtract 36 on both sides: -45 = 9y
- Divide both sides by 9: -5 = y
- Rewrite: y = -5
<u>Step 3: Check</u>
<em>Plug in y to verify it's a solution.</em>
- Substitute: -9 = 2(18) + 9(-5)
- Multiply: -9 = 36 - 45
- Subtract: -9 = -9
Answer:
y=-6x-40
Step-by-step explanation: