Jacob works on a berry farm. He picks blueberries and raspberries that are stored by the pint.
One pint of blueberries weighs 12 ounces and one pint of raspberries
weigh 10.5 ounces.
At the end of the week he has picked a total of 622.5 ounces of
blueberries and raspberries.
O
Jacob also notices that he has picked 11 more pints of blueberries than
raspberries.
О O
Which system of equations can be used to determine the number of
pints of blueberries, b, and raspberries, r, Jacob picked that week?

here is your mark brainliest

step-by-step explanation:

6.48/4 4 goes into 6.48 1.62 times

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5