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3 years ago

A pipe is 30 feet long. It needs to be cut into pieces that are each 2/3 feet long. How many pieces can be made from the pipe?

Mathematics

2 answers:

mojhsa [17]3 years ago

8 0

Answer:

2/30

Step-by-step explanation:

Because you are adding then

Veseljchak [2.6K]3 years ago

3 0

Answer:

45 pieces

Step-by-step explanation:

30 divided by 2/3. Use KCF and you get 30/1 x 3/2

30/1 x 3/2= 90/2=45

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Musya8 [376]

Step-by-step explanation: it would help to compare whitch the answer would be 5 to 7

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3 years ago

What equation results from completing the square and then factoring x^2+4x=7

Gekata [30.6K]

Answer: x=−2+√11 or x=−2−√11

Step-by-step explanation:

x2+4x−7=7−7

x2+4x−7=0

For this equation: a=1, b=4, c=-7

1x2+4x+−7=0

Step 2: Use quadratic formula with a=1, b=4, c=-7.

−b±√b2−4ac

−(4)±√(4)2−4(1)(−7)

2(1)

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3 years ago

HELP PLEASE 100 POINTS

iragen [17]

Answer: I think its the last one

Step-by-step explanation:

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2 years ago

Read 2 more answers

The equation p(t) = 1.e represents a

zvonat [6]

Answer:

(b), (d) and (e)

Step-by-step explanation:

Given

$p(t) = 1 * e^t$

See attachment for $y = p(t)$

Required

Select true statements from the given options

(a) $\ln(30)$ = days the bacteria reaches 30000

We have:

$p(t) = 1 * e^t$

In this case:

$t = \ln(30)$ and $p(t) = 30000$

So, we have:

$30000 = 1 * e^{\ln(30)}$

$30000 = e^{\ln(30)}$

Using a calculator, we have:

$e^{\ln(30)} = 30$

So:

$30000 = 30$

The above equation is false.

(a) is not true

(b) The graph shows that $\ln(20) \approx 3$

We have:

$p(t) = 1 * e^t$

Let t = 3

So;

$p(3) = 1 * e^3$

From the graph, $p(3) = 20$

So:

$20 = 1 * e^3$

$20 = e^3$

Take natural logarithm of both sides

$\ln(20) = \ln(e^3)$

This gives:

$\ln(20) = 3$

(b) is true

(c) $\ln(t) = y$ is the logarithm form of $y = e^t$

We have:

$y = e^t$

Take natural logarithm of both sides

$\ln(y) = \ln(e^t)$

This gives:

$\ln(y) = t$

$\ln(y) = t$ $\ne$ $\ln(t) = y$

(c) is false

(d) $e^4 > 50$ and $\ln(50) < 4$

From the graph, we have:

$e^4 = 54$ --- rough readings

This implies that:

$e^4 > 50$ is true

Because $54 > 50$

Take natural logarithm of both sides

$\ln(54) > \ln(50)$

Rewrite as:

$\ln(50) < \ln(54)$

We have:

$e^4 = 54$

Take natural logarithm of both sides

$\ln(e^4) = \ln(54)$

$4 = \ln(54)$

$\ln(54) = 4$

Substitute $\ln(54) = 4$ in $\ln(50) < \ln(54)$

$\ln(50) < 4$

(d) is true

(e) The graph shows that $10 \approx \ln(2.3)$

We have:

$p(t) = 1 * e^t$

Let t = 2.3

So;

$p(2.3) = 1 * e^{2.3}$

From the graph,

$p(2.3) = 10$ ---- rough readings

So:

$10 = 1 * e^{2.3}$

$10 = e^{2.3}$

Take natural logarithm of both sides

$\ln(10) = \ln(e^{2.3})$

This gives:

$\ln(10) = 2.3$

(e) is true

4 0

3 years ago

UREGENT‼️‼️<br> 4. Find the slope of the line that passes<br> through the following pairs of points:

AURORKA [14]

Answer:

A.-8 B.1/10

Step-by-step explanation:

a. -75--51=-24

10-7=3

-24/3=-8

b. 12.5-10.5=2

25-5=20

2/20=1/10

7 0

3 years ago