Answer:
Is the surface a rectangle?? If so, then the surface area would be 35
Step-by-step explanation:
5 * 7 = 35
Hope this helped!! :)
Let x be your first alloy
2/5x+7/10(30-x)=1/2(30)
4x+210-7x=150
3x=60
x=20
So, you need 20 lbs of the first alloy, and 10 parts of the second to make 30 lbs of half iron and half silver alloy!
Answer:
Almost any situation where there is an unknown quantity can be represented by a linear equation, like figuring out income over time, calculating mileage rates, or predicting profit. Many people use linear equations every day, even if they do the calculations in their head without drawing a line graph.
Step-by-step explanation:
Hope it is helpful....
Answer: 71
Step-by-step explanation:
Answer:
1.25
Step-by-step explanation:
it is what it is