It’s like -5 or something maybe
Answer:
A=158
Step-by-step explanation: SA = 2 × l × w + 2 × l × h + 2 × w × h
Answer:
![3 - a](https://tex.z-dn.net/?f=%203%20-%20a%20)
Step-by-step explanation:
Given that when you add two numbers together the result is 3.
The greater of the number is given as a.
Let "x" represent that lesser number.
Thus:
![a + x = 3](https://tex.z-dn.net/?f=%20a%20%2B%20x%20%3D%203%20)
To make x the subject of the formula. Subtract a from both x.
![a + x - a = 3 - a](https://tex.z-dn.net/?f=%20a%20%2B%20x%20-%20a%20%3D%203%20-%20a%20)
![x = 3 - a](https://tex.z-dn.net/?f=%20x%20%3D%203%20-%20a%20)
Therefore, the expression that represents the lesser number, x, is:
![3 - a](https://tex.z-dn.net/?f=%203%20-%20a%20)
Well, we can substitute the variables and get :
9(21)+3(3)(21)+12
Then we simplify :
189+189+12
To get :
390 flowers
By the way you might be confused like I was for it said "a cake topping," whilst I assumed all tables had cake toppings which is untrue and I nearly ended up with 630 flowers.