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3 years ago

Please help!! PLEASE!!!

Mathematics

1 answer:

serious [3.7K]3 years ago

5 0

Answer:

30%

Step-by-step explanation:

subtract the post-discount price from the pre-discount price

64.99 - 45.49 = 19.50

divide the answer by the original price

$\frac{19.50}{64.99}$ = 0.30

multiply the answer by 100

0.30 x 100 = 30%

to check:

take the original number and multiply it by the decimal form of the percentgae:

64.99 x 30% (0.30) = 19.50

take the answer and subtract it from the orginal answer

64.99 - 19.50 = 45.49

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Solve for x using cross multiplication 3x - 3 5 = 2x – 2 4 x = [?]

Harlamova29_29 [7]

Answer:

x = -35/22, or 1.5909090...

Step-by-step explanation:

Solving for x will be easy enough, but cross multiplication won't be necessary as that's only applicable when division is involved:

35 = 2x - 24x

35 = -22x

x = -35/22, or 1.5909090...

3 0

3 years ago

I NEED HELP WITH THESE MATH PROBLEMS!!

Dafna11 [192]

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4 years ago

LUVP is an example of:

Vesnalui [34]

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4 0

3 years ago

The rate of change of the population of a small town is dPdt=kP, where P is the population, t is time in years and k is the grow

MAXImum [283]

Answer:

P = 94800 inh (town population at t = 10)

Step-by-step explanation: We get:

dP/dt = kP (1)

Population in year 2 is 30000

Population in year 4 is 40000

From equation (1)

dP/P = kdt

Then

∫ 1/P dp = k ∫dt

Ln (P) = kt + c (2)

Now we know populations in years 2 and 4 then by subtitution

Ln (40000) = 4k + c

Ln ( 30000) = 2k + c

Subtracting these equation we have

Ln (40000) - Ln ( 30000) = 2k

Then we can get k ??

ln ( 40000/30000) = 2k k = 1/2 Ln ( 4/3)

Now weareable to find population when t = 10

Equation (2)

Ln (P) = kt + c and from previous data

Ln (40000) = 4k + c

ln (P) = 10* k + c

Ln (40000) = 4k + c

The same procedure

Ln (P) - Ln ( 40000) = 6k

Ln (P) - Ln ( 40000) = 6* 1/2 Ln ( 4/3)

Ln (P) - Ln ( 40000) = 3*Ln (4/3)

Ln [ P/ 40000 ] = 3*Ln (4/3)

Eliminating Ln on both sides of the equation

P / 40000 = (4/3)³

P = 40000 * (4/3)³

P = 40000 * 2.37

P = 94800 inh (town population at t = 10)

3 0

4 years ago

Please help im literally crying im desperate i can't fail please

KonstantinChe [14]

Answer:

as my caculation the answer is : 11.3137 m3

Step-by-step explanation:

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4 0

3 years ago