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3 years ago

If 64 feet of rope weighs 20 pounds how much will 80 feet of the same rope weigh

Mathematics

2 answers:

lisov135 [29]3 years ago

7 0

Answer:

64 feet/ 20 lbs = 80 feet/ x lbs

80 times 20 divided by 64= 25 pounds

Step-by-step explanation:

20 pounds/ 64 feet = .3125 pounds per foot of rope

0.3125 pounds per foot x 80 feet = 25 pounds

Nikolay [14]3 years ago

6 0

It would weigh 25 pounds

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-3 the answer is -3 ight

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3 years ago

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Express each x in terms of y: 1. 2x - 3 = y 2. 2 + 2x -1 = 4y 3. 2A + 4x + 3B = 10

jeka57 [31]

Answer:

1/2y+3/2

2y+-1/2

-3/2b-2x+5

Step-by-step explanation:

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3 years ago

Express the integral as a limit of Riemann sums. Do not evaluate the limit. (Use the right endpoints of each subinterval as your

Darina [25.2K]

Answer:

Given definite integral as a limit of Riemann sums is:

$\lim_{n \to \infty} \sum^{n} _{i=1}3[\frac{9}{n^{3}}i^{3}+\frac{36}{n^{2}}i^{2}+\frac{97}{2n}i+22]$

Step-by-step explanation:

Given definite integral is:

$\int\limits^7_4 {\frac{x}{2}+x^{3}} \, dx \\f(x)=\frac{x}{2}+x^{3}---(1)\\\Delta x=\frac{b-a}{n}\\\\\Delta x=\frac{7-4}{n}=\frac{3}{n}\\\\x_{i}=a+\Delta xi\\a= Lower Limit=4\\\implies x_{i}=4+\frac{3}{n}i---(2)\\\\then\\f(x_{i})=\frac{x_{i}}{2}+x_{i}^{3}$

Substituting (2) in above

$f(x_{i})=\frac{1}{2}(4+\frac{3}{n}i)+(4+\frac{3}{n}i)^{3}\\\\f(x_{i})=(2+\frac{3}{2n}i)+(64+\frac{27}{n^{3}}i^{3}+3(16)\frac{3}{n}i+3(4)\frac{9}{n^{2}}i^{2})\\\\f(x_{i})=\frac{27}{n^{3}}i^{3}+\frac{108}{n^{2}}i^{2}+\frac{3}{2n}i+\frac{144}{n}i+66\\\\f(x_{i})=\frac{27}{n^{3}}i^{3}+\frac{108}{n^{2}}i^{2}+\frac{291}{2n}i+66\\\\f(x_{i})=3[\frac{9}{n^{3}}i^{3}+\frac{36}{n^{2}}i^{2}+\frac{97}{2n}i+22]$

Riemann sum is:

$= \lim_{n \to \infty} \sum^{n} _{i=1}3[\frac{9}{n^{3}}i^{3}+\frac{36}{n^{2}}i^{2}+\frac{97}{2n}i+22]$

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4 years ago

Algebra A) 50+Z=81 Explain.

Ivan

Answer:31

Step-by-step explanation:

You subtract 81 and 50

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3 years ago

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I’ll 40 points for these answers, thank you

attashe74 [19]

1. 24%
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1. Since 6/25 is .24, 24% of the class was absent
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3. He ran 3 of the 5 miles, so 3/5 = 0.6.. meaning 60%. The time doesn’t matter

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3 years ago

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