Question

6а+ 1/5*(1,5а-3) при а=30

Answer 1

6•30+0.2(1,5•30-3)=

180+0,2•(45-3)=

180+0,2•42=

180•8,4=

1512

Answer 2

6*30+1/5(1,5*30-3)=
=180+0,2*42=180+8,4=188,4

Answer 3

To evaluate the expression 6а + 1/5 * (1.5а - 3) when а = 30, we need to substitute the value of а into the expression and perform the arithmetic calculations.

Step 1: Substitute the value of а = 30 into the expression: 6 * 30 + 1/5 * (1.5 * 30 - 3)

Step 2: Simplify the expression inside the parentheses: 6 * 30 + 1/5 * (45 - 3)

Step 3: Continue simplification within the parentheses: 6 * 30 + 1/5 * 42

Step 4: Calculate the value inside the parentheses: 6 * 30 + 8.4

Step 5: Perform the final multiplication and addition: 180 + 8.4 = 188.4

So, when а = 30, the value of the expression is 188.4.