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olganol [36]
3 years ago
10

Simplify the expression. 3 (15- 3)² - 4 ]

Mathematics
1 answer:
Jet001 [13]3 years ago
5 0

Answer:

428.

Step-by-step explanation:

Work is in picture

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What is a equivalent fraction for 3/9?
kherson [118]
1/3 = 2/6 = 3/9 = 4/12 = 5/15 = 6/18 = 7/21 = 8/24 = 9/27 = 10/30 = 11/33 = 12/36 = 13/39 = 14/42 = 15/45 = 16/48 = 17/51 = 18/54 = 19/57 = 20/60
You can use any, these are just the smallest to the biggest but any are fine but I would use the first one. Hope I helped. Equivalent is what 3/9 equals to.
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Vehicle can be a synonym for car
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Find the median for 8, 11, 6, 14, x, 13, and 11
Rainbow [258]
Median = 11. Sorry if wrong


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3 years ago
A tank contains 100 gal of brine made by dissolving 80 Ib of salt in water. Pure water runs into the tank at the rate of 4 gal/m
ohaa [14]

Answer:

Step-by-step explanation:

Amount of brine = 100 gal

amount of salt = 80 lb

rate of water running = 4 gal / min

Let A be the amount of salt in lb in the tank at any time t.

(a) dA/dt = rate of salt in - rate of salt out

Rate of salt in = 0

rate of salt out = A x 4 / 100 = A / 25 lb/min

So, dA/dt = 0 - A/25 = - A/25 lb/min

\frac{dA}{A}=-\frac{1}{25}dt

\int \frac{dA}{A}=-\frac{1}{25}\int dt

A(t) = C e^{-0.04t}

When t = 0, A = 80 lb

So,

A(t) = 80 e^{-0.04t}

(b) Now, A = 40 lb

So,

40 = 80 e^{-0.04t}

0.5 = e^{-0.04t}

take log on both the sides

ln 0.5 = - 0.04 t

t = 17.3 minutes

8 0
3 years ago
PLS HELP ASAP THANKS ILL GIVE BRAINLKEST PLS THANKS PLS ASAP PLS PLS HELP
Nonamiya [84]

Answer:

A. N and Q

Step-by-step explanation:

Look at the order of the triangles: MNL and PQR

MNL and PQR

They are both ordered in the middle, whereas others like M and Q are not. For example, M is ordered first and Q is middle.

N and Q match - The correct letters will always align in the order

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2 years ago
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