9 A container had a mass of 1.26 kg when it was completely filled with sand. It had a mass of 1.05 kg when it was filled with sand. Find the mass of the container.​

0.7 kg

Step-by-step explanation:

x = mass of the empty container (just the container alone)

y = mass of the sand in the full container.

x + y = 1.26 kg

x + 5/8 × y = 1.05 kg

=>

x = 1.26 - y

(1.26 - y) + 5y/8 = 1.05

8×(1.26 -y) + 5y = 8×1.05

8×1.26 - 8y + 5y = 8×1.05

10.08 - 3y = 8.4

3y = 1.68

y = 0.56 kg

x = 1.26 - 0.56 = 0.7 kg

(d)

step-by-step explanation:

given: the line in the graph passes through points (5,30) and (6,26).

then, the equation of line is:

now, put y=a(n) and x=n,

hence, option d is correct.

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.