Answer:
See below.
Step-by-step explanation:
(a)
Let w = number of weeks since she started culinary school.
Let r = number of recipes she knows at the end of week w.
(b)
Each week she learns 3 new recipes. In w weeks she learns 3w new recipes.
She already knew 4 recipes before starting school.
The equation is:
r = 3w + 4
(c)
After 18 weeks of school, w = 18.
r = 3w + 4
r = 3(18) + 4
r = 54 + 4
r = 58
(d)
After 18 weeks of school, she will know 58 recipes.
She knew 4 recipes before starting school. in 18 weeks of school she learned 18 * 3 = 54 recipes. Altogether, after 18 weeks of school, she knows 58 recipes.