Dans poubling and halving can be helpful when carrying out some calculations. You can halve one number and then double the result;
20 x 164 = 10 x 164 x 2 = 1640 x 2 = 3280.
You can partition the number and double part of it and halve its result:
32 x 15 = 32 x 10 + 32 x 10 = 2 = 320 + 320 : 2 = 320 + 160 = 480.
More difficult calcualtions can be made easier by doubling one number in the calculatia
and halving the result: 24 x 15 = 24. x 30 = 2 = 720 = 2 = 360.
To multiply by 50, multiply by 100 and halve the result. To multiply by 25, multiply by 100 a
divide the result by 4.​

answer: the price of one pound cabbage = $ 0.8

the point (10,8) represents that the cost of 10 pounds cabbage is $ 8

step-by-step explanation:

since, here is a proportional relation between the number of pounds of cabbage (x) and the price in dollars (y).

therefore, we can write,

⇒ y = k x

where k is the constant of proportionality.

now, point (5,4) is in the line.

thus, it will satisfies the above equation of line.

⇒ 4 = 5 k

⇒ k = 0.8

thus, the equation of the line is,

y = 0.8 x

a) for x = 1,

y = 0.8

therefore, the cost of one pound of cabbage is 0.8 dollars.

b) in the below graph (10,8) represents that the cost of 10 pounds of cabbage is 8 dollars.

the correct answer is 5 6 and 7

13

step-by-step explanation:

divide the cost of the total of sodas you bought by the cost of one soda, for example:

$24.57 divided by $1.89 is 13 which means you bought 13 sodas

answer: do we write it

step-by-step explanation: