Check my work! will give brainliest if ur right 1. Which part of the following problem should be worked first?
111+33+87/5=135

A. 111+33
B. 33/5
C. 87/5
D. 33+87***

2. A student solves the following problem: 2(x-3)+3x=19
Step 1 2x=6+3x=19
Step 2 (2x+3x)-6=19
Step 3 5x-6=19
Step 4 5x-6+6=19+6
Step 5 5x=25
Step 6 x=5

What property justifies step 4?
A. addition property of equality
B. Communitive property of addition
C. Substitution***
D. Multiplication property of equality

1) C

Step-by-step explanation:

B-BRACKETS

I-INDICES

D-DIVISION

M-MULTIPLICATION

A-ADDITTION

people went from manufacturing one object at a time by hand to manufacturing many objects in factories

(a) {a₁, a₁r, a₁r², … a₁rⁿ⁻¹, …}

(b) $59 398

step-by-step explanation:

(a) the annual sequence of profits

aₙ = a₁rⁿ⁻¹

the model for the sequence of profits is {a₁, a₁r, a₁r², … a₁rⁿ⁻¹, …} .

(b) profit after 15 yr

  a₁ = $ 30 000

  r = 1.05

a₁₅ = 30 000 × 1.05¹⁴

a₁₅ = 30 000 × 1.979 93

a₁₅ = $59 398

the profit in year 15 will be $59 398.