3 years ago

Which expression is equivalent to 9(3u+5u)

Mathematics

1 answer:

s2008m [1.1K]3 years ago

7 0

Answer:

72u

Step-by-step explanation:

simply the expression

You might be interested in

Y=arccos(1/x) Please help me do them all! I don’t know derivatives :(

Fantom [35]

Answer:

Step-by-step explanation:

3 0

2 years ago

Water whose temperature is at 100∘C is left to cool in a room where the temperature is 60∘C. After 3 minutes, the water temperat

Tju [1.3M]

Answer:

21.68 minutes ≈ 21.7 minutes

Step-by-step explanation:

Given:

$T=60+40e^{kt}$

Initial temperature

T = 100°C

Final temperature = 60°C

Temperature after (t = 3 minutes) = 90°C

Now,

using the given equation

$T=60+40e^{kt}$

at T = 90°C and t = 3 minutes

$90=60+40e^{k(3)}$

$30=40e^{3k}$

$e^{3k}=\frac{3}{4}$

taking the natural log both sides, we get

3k = $\ln(\frac{3}{4})$

3k = -0.2876

k = -0.09589

Therefore,

substituting k in 1 for time at temperature, T = 65°C

$65=60+40e^{( -0.09589)t}$

$5=40e^{( -0.09589)t}$

$e^{( -0.09589)t}=\frac{5}{40}$

$e^{( -0.09589)t}=0.125$

taking the natural log both the sides, we get

( -0.09589)t = ln(0.125)

( -0.09589)t = -2.0794

t = 21.68 minutes ≈ 21.7 minutes

6 0

3 years ago

Shiva works on a 4 hour shift. After 6/5 hours, she takes a break. How much of the work shift does she have left?

Mrrafil [7]

Answer: 3 hours and 20 minutes

Step-by-step explanation:

First , you convert your fraction to a decimal.

6/5 = 1.2

Second , you subtract 4 minus 1.2 to see how much of the work shift does she have left ( since 1.2 hours is what she worked).

4 - 1.2 = 2.8 = 2 hours and 80 minutes (60 minutes is an hour) = 3 hours and 20 minutes

5 0

3 years ago

P=<img src="https://tex.z-dn.net/?f=%5Cfrac%7B%28a%2Bb%29%20h%7D%7B2%7D" id="TexFormula1" title="\frac{(a+b) h}{2}" alt="\frac{(

HACTEHA [7]

You posted a formula with no equation, there’s no way to answer your question

3 0

3 years ago

Rewrite using a single positive exponent..- 7^2 —— 7^-4

stellarik [79]

Answer:

7 ^2 ⋅ 7 ^4 = 49^6

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

Which expression is equivalent to 9(3u+5u)​

Which expression is equivalent to 9(3u+5u)