6th grade math , help pleasee:)

C

Step-by-step explanation:

15 mins to 50 mins(part/whole) and divide everything by 5

B. 1 : 2

Step-by-step explanation:

Add up how much time he spent doing each exercise to find the total number of minutes for his workout.

10 + 25 + 15 = 50 minutes

He spent 25 minutes lifting weights. So, the ratio is:

25 : 50

Now simplify by dividing each side by 25.

25 : 50

= 1 : 2

The ratio of the number of minutes he lifted weights to the total number of minutes of his entire workout is 1 : 2.

Hope that helps.

23

step-by-step explanation:

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.