These two questions are not connected.

4a. 7 phones on phone plan

4b. 10 phones

Other Problem: a = dy + cd

Step-by-step explanation:

4a.

1. First make equation: y = 15x+50

2. Plug in Number

155 = 15x + 50

-50                 -50

105 = 15x

15        15

x = 7

4b.

1. Make Equation: 200 greater than or equal to 15x + 50

2. Solve

200 greater than or equal to 15x + 50

-50                                                   -50

150 greater than or equal to 15x

15                                             15

x = 10

Second Question

y = a/d - c

Step 1: Move C to other side

y = a/d - c

+c         +C

y+c = a/d

Step 2: Isolate A (Multiply all by d)

(multipy d to y and c) (d) y+c = a/d (d) (multiply by d to isolate a)

a = dy + cd

step-by-step explanation:

this woman was an important writer and propagandist during the american revolution. she was a member of the committee of correspondence (in fact the committee was formed in her home) and was an advisor to many of the revolutionary leaders, including george washington and john adams. who was this revolutionary woman?

the answer for this question is 38