Question

5 3/8y+2,25y- 1 9/16y при у=4

Answer 1

Переведу в десятичные дроби
5,375у+2,25у-1,375у=6,25у=6,25*4=25

Answer 2

To evaluate the given expression when y = 4, simply substitute y with 4 in each term and then perform the arithmetic operations.

Expression: 5(3/8)y + 2.25y - 1(9/16)y

Step 1: Substitute y with 4 in each term: 5(3/8)(4) + 2.25(4) - 1(9/16)(4)

Step 2: Perform the operations: = 5 * 3/8 * 4 + 2.25 * 4 - 1 * 9/16 * 4 = 5 * 3/2 + 9 - 1 * 9/4 = 15/2 + 9 - 9/4

Step 3: Find a common denominator for 2 and 4, which is 4: = (15/2) * (2/2) + 9 - (9/4) * (1/1) = 30/4 + 9 - 9/4

Step 4: Add the fractions with the same denominator: = (30 + 9 * 4 - 9) / 4 = (30 + 36 - 9) / 4 = 57 / 4

So, when y = 4, the expression evaluates to 57/4 or 14.25.