Fill in the missing work and justification for step 2 when solving 3(x + 2) = 12.
step work justification
step1: 3(x + 2) = 12 = given
step2:
step3: 3x + 6 − 6 = 12 − 6 = subtraction property of equality
step4: 3x = 6 = simplify
step: 5 three times x over three equals six over three= division property of equality
step6: x = 2 = simplify
a. 3x + 6 = 12; distributive property
b. 3x + 2 = 12; distributive property
c. 3x + 6 = 12; multiplication property of equality
d. 3x + 2 = 12; multiplication property of equality

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

Amanager recorded the number of bicycles sold by his company each quarter. his projected sales after t years is given by the expression below. which of the following statements best describes the expression? a. the initial sales of 575 bicycles increases at the rate of 4% over 4 quarters. b. the initial sales of 575 bicycles increases at the rate of 18% over 4 years. c. the initial sales of 575 bicycles increases at the rate of 4% over t quarters. d. the initial sales of 575 bicycles increases at the rate of 18% over t years.

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. write the function's formula.