Dr. irvine saw 130 patients in one week. the ratio of kids to adults that he saw is 3 to 7. if k represents the number of kids and d represents the number of adults, which system of equations should be set up to find out how many kids dr. irvine saw during the week?

a. k+d=130
3k = 7d

b. 3k+7d=130
3k = 7d

c. k+d=130
7k = 3d

d. 3k+7d+130
7k = 3d

, will mark brainliest.

The correct answer is

C. k+d=130

7k = 3d

Number of kids Dr. Irvine see in a week is 39.

Step-by-step explanation:

1. Let's review the information given to answer the question correctly:

Number of patients Dr. Irvine see in a week = 130

Radio of kids to adults = 3:7 or 3/7

Number of Kids = k

Number of adults = d

2. Let's find the equations system that should be set up to find out how many kids Dr. Irvine see

k + d = 130 (Number of patients Dr. Irvine see in a week)

Including the ratio:

7k = 3d

Replacing d:

d = 130 - k

Now substituting:

7k = 3 * (130 - k)

7k = 390 - 3k

10k = 390

k = 390/10

k = 39

trapezoid

step-by-step explanation:

first i plotted all my points on a grid graph

i made sure all of them were in the correct quadrant

then i saw it was a trapezoid or a quadrilateral

inch

step-by-step explanation:

yard and mile are too big.