Question

If Lydia wants to text at least 8 characters per second, like James, then the equation 10r + 4 = 8 could be used to model this situation. Solve this equation for r.

Answer 1

r= 0.4

Explanation:

10r+4=8

-4. -4

10r= 4

----- ------= 0.4. so.... (r=0.4)

10. 10.

Answer 2

Answer: r = 2/5

Explanation:

Hi, to answer this question we have to solve the equation given for r:

10r + 4 = 8

Subtracting 4 from both sides

10r+4-4=8-4

10r = 4

Dividing each side by 10:

10r/10 =4/10

r = 2/5

In conclusion, the value of r is 2/5 (or 0.4 in decimals)

Feel free to ask for more if needed or if you did not understand something.