00:00 Estimate 25.65 + 13.23 + 6.35 by rounding each number to the nearest tenth.
26 +13 + 6 = 45
25.7 + 13.3 + 6.4 = 45.4
25.6 + 13.2 + 6.3 = 45.1
25.7 + 13.2 + 6.4 = 45.3

Step-by-step explanation:

Given

Required

Approximate to nearest tenth and solve

Approximating each term to the nearest tenth, we have

Bring the approximated term together:

becomes

Hence:

Option D answers the question

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18