Answer:
1680
Step-by-step explanation:
12+7+6=25
12+20*12=252
20+20+7=47
7*20*12=1680
Answer:7.8
Step-by-step explanation:
Answer:
A is the correct answer.
Step-by-step explanation:
y and x meet on those numbers. And i did the test.
hope this helps
Answer:
Step-by-step explanation:
Let age of each twin be x
let age of sister be s
So we can write:
x + 4 = s
The product of the 3 siblings ages is 3482 more than sum. We can write:
![s*x*x=3482+(s+x+x)](https://tex.z-dn.net/?f=s%2Ax%2Ax%3D3482%2B%28s%2Bx%2Bx%29)
This can be simplified as:
![sx^2=3482+s+2x](https://tex.z-dn.net/?f=sx%5E2%3D3482%2Bs%2B2x)
We replace s with "x + 4" and solve:
![(x+4)x^2=3482+x+4+2x\\x^3+4x^2=3486+3x\\x^3+4x^2-3x-3486=0\\x=14](https://tex.z-dn.net/?f=%28x%2B4%29x%5E2%3D3482%2Bx%2B4%2B2x%5C%5Cx%5E3%2B4x%5E2%3D3486%2B3x%5C%5Cx%5E3%2B4x%5E2-3x-3486%3D0%5C%5Cx%3D14)
<u>Note:</u> To solve this cubic, we used technology
Thus, we can say the twins are 14 years old
Answer:
The cost of the sweater before the markup is $24.50.
Step-by-step explanation:
The percent markup of an item is calculated by subtracting the original cost of the item from the sale price and then dividing by the original cost. In this case, we are trying to find the original cost, so we know that the percent markup is 40%, or 0.4. Since the sale price of the item would be 100% of the original cost multiplied by an additional 40% markup, we can take the sale price of the item divided by 140%, or 1.4: 34.30/1.4 = 24.50.