Question

1. evaluate 10.2x + 9.4y when x = 2 and y = 3.

10.2(\boxed{\quad}) + 9.4(\boxed{\quad})
= \boxed{\quad} + 28.2
= \boxed{\quad}

Explanation:

Step1: Substitute x and y

Substitute \( x = 2 \) and \( y = 3 \) into \( 10.2x + 9.4y \), so we get \( 10.2(2) + 9.4(3) \).

Step2: Calculate 10.2×2

Calculate \( 10.2\times2 = 20.4 \). Now the expression becomes \( 20.4 + 28.2 \) (since \( 9.4\times3 = 28.2 \)).

Step3: Add the two terms

Add \( 20.4 \) and \( 28.2 \): \( 20.4 + 28.2 = 48.6 \).

Answer:

First box: \( 2 \), Second box: \( 3 \), Third box: \( 20.4 \), Fourth box: \( 48.6 \)