Question

3a+c при a7/2. c=3 1/4

Answer 1

3а+с при а=7/2 и с=3 1/4;
3/1*7/2+3 1/4=21/2+3 1/4=42/4+12/4=54/4=13 5/10=13,5

Answer 2

To find the value of the expression 3a + c when a = 7/2 and c = 3 1/4, you simply need to substitute these values into the expression and perform the calculations.

Given: a = 7/2 and c = 3 1/4

First, convert c to an improper fraction: c = 3 1/4 = (4 * 3 + 1) / 4 = 13/4

Now, substitute the values of a and c into the expression 3a + c:

3 * (7/2) + (13/4)

Now, perform the calculations step by step:

Step 1: Multiply 3 by 7/2: 3 * (7/2) = 21/2

Step 2: Add 21/2 to 13/4: 21/2 + 13/4

To add these fractions, they need a common denominator. The common denominator of 2 and 4 is 4.

Step 3: Convert 21/2 to have a denominator of 4: 21/2 = (21/2) * (2/2) = 42/4

Now the expression becomes:

42/4 + 13/4

Step 4: Add the fractions with the same denominator: 42/4 + 13/4 = (42 + 13) / 4 = 55/4

So, the value of the expression 3a + c when a = 7/2 and c = 3 1/4 is 55/4 or 13 3/4.