Food mix a contains 2% fat, and food mix b contains 7% fat. a 20-kilogram diet mix of foods a and b is formed. if x kilograms of food a are used, write an algebraic expression that represents the total number of kilograms of fat in the final food mix. simplify the expression.

The required expression is y = 1.4 - 0.05x

Step-by-step explanation:

Consider the provided information.

Food mix A contains 2% fat and food mix B contains 7% fat.

Let x kilograms of food A are used, in a 20-kilogram mixture.

Thus, 20 - x kilograms of food B are used, in a 20-kilogram mixture.

Now It is given that A contains 2% fat and food mix B contains 7% fat.

2% and 7% can be written as 0.02 and 0.07 respectively. Let represent the total fat with y.

Thus, the required expression is:

y = 2% (x) + 7% (20 - x)

y = 0.02 (x) + 0.07 (20 - x)

y = 0.02x + 1.4 - 0.07x

y = 1.4 - 0.05x

Hence, the required expression is y = 1.4 - 0.05x

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

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step-by-step explanation: