The Clark family has a hallway that perimeter is 10and4/10 then they add that shortens the length of hallway what is the new perimeter? A. 3 3/10 B.6 6/10 C.9 2/10 D.9 8/10

C. 9 2/10

Step-by-step explanation:

Because it measures 10. And we cut 4/10 in length, therefore, this value is decreased twice so that it remains a rectangle.

Then it would be:

10 - 2 * (4/10) = 10 - 8/10 = 9.2

And this 9.2 we can express it as a mixed number as follows:

9.2 = 9 2/10

If we check, we know that 2/10 = 0.2 that added to 9, would be equal to 9.2

he spend 5.1 minutes chatting with his friends

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5 1/10

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.