Will give a brainliest if ur 100% right

the american college of sports medicine recommends exercising at an intensity of 60% to 90% of your maximum heart rate.

age
20-24
25-29
30-34
33-39
40-44

maximum heart rate
200
195
190
185
180

target range
120-180
117-176
114-171
111-167
108-162

rudy is 42 years old. write an inequality to represent at least 70% of his maximum heart rate.

a.
x ≥ 70+180 or x ≥ 250
b.
x ≥ 0.07 * 180 or x ≥ 12.6
c.
x ≥ 0.7 * 180 or x ≥ 126
d.
x ≥ 180-70 or x ≥ 110

(50 ) mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.