.A length, originally 9cm, is increased so that the ratio of the new length to the old length is 13:3. What is the new length

The new length is 39 cm

Step-by-step explanation:

We will use the ratio method to solve the question

∵ A length, originally 9cm, is increased

∴ The original length = 9 cm

∵ The ratio of the new length to the old length is 13 : 3

→ That means the ratio is ⇒ New : Original is 13 : 3

∴ The ratio New : Original = 13 : 3

→ By using the ratio method

→  New  :  Original

→  13      :   3

→  x        :   9

→ By using cross multiplication

∵ x × 3 = 13 × 9

∴ 3x = 117

→ Divide both sides by 3

∵ =

∴ x = 39

∵ x represents the new length

∵ x = 39

∴ The new length is 39 cm

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.

where did you get them? if you picked from the grass, is is probably poisonous.

step-by-step explanation: