From a 200-ton pile of coal, a conveyor belt removes 1
1
ton per minute. By lunchtime, only of a ton was left
3
6
on the pile. Which equation can be used to find x, the
number of minutes the conveyor belt was used to remove
coal before lunch?
А
1
Х
6
B
1
= 200
3
1 1
X=
3 6
1 1
X+ - = 200
6 3
1 1
200+
6
200
D

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540

x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)