What is the positive solution of 3x^2-10x-8=0?

4

Step-by-step explanation:

Explanation:

D

=

d

2

=

b

2

−

4

a

c

=

100

+

96

=

196

-->  

d

=

±

14

There are 2 real roots:

x

=

−

b

2

a

±

d

2

a

=

10

6

±

14

6

=

5

3

±

7

3

The positive real root is :  

12

3

=

4

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: