(3xy2)3 simplified im not sure how to do this

Carrie saved money to spend while on a one-month vacation to Europe. On day 8, she had $2,400 remaining. On day 16, she had $1,6

garik1379 [7]

If this is represented by a linear function, then we know that the amount of money decreases at an unchanging amount. Knowing this, and knowing that on day 8, she had 2400, we simply just add 2400 to 8 100's:

2400 + 8*100 = 2400 + 800

Carrie initially had $3200, or Option C.

6 0

3 years ago

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Starting at sea level, a submarine descended at a constant rate to a depth of −56 mile relative to sea level in 4 minutes. What

Sav [38]

Hello,

Okay, So to get to your answer, -56 in 4 minutes. And it wants to know how much in the first minute. So what I would do is to divide -54 by 4. And your answer would be -14.

Hope this helps

7 0

3 years ago

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Find the slope and y-intercept of each equation. Y=-5x+8

Natali [406]

Answer:

Slope= -5

y-intercept=8

Step-by-step explanation:

In the formula y=mx+b

The m is the slope and the b is the y-intercept.

8 0

3 years ago

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What is the percent change from 36 to 63

viva [34]

Initial number = 36
Final number = 63
Change in number = 63 - 36
   = 27
Percentage change = (27/36) * 100
   = (3/4) * 100
   = 3 * 25
   = 75 percent
So the percentage change from 36 to 63 is 75%. I hope the procedure for solving is absolutely clear for you to understand. In future you can attempt such problems by following the procedure shown and you will require no further help from outside. Just be careful about the numerator and the denominator.

4 0

3 years ago

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Find the indicated probability. The weekly salaries of teachers in one state are normally distributed with a mean of $490 and a

Alecsey [184]

Given Information:

Mean weekly salary = μ = $490

Standard deviation of weekly salary = σ = $45

Required Information:

P(X > $525) = ?

Answer:

P(X > $525) = 21.77%

Step-by-step explanation:

We want to find out the probability that a randomly selected teacher earns more than $525 a week.

$P(X > 525) = 1 - P(X < 525)\\\\P(X > 525) = 1 - P(Z < \frac{x - \mu}{\sigma} )\\\\P(X > 525) = 1 - P(Z < \frac{525 - 490}{45} )\\\\P(X > 525) = 1 - P(Z < \frac{35}{45} )\\\\P(X > 525) = 1 - P(Z < 0.78)\\\\$

The z-score corresponding to 0.78 from the z-table is 0.7823

$P(X > 525) = 1 - 0.7823\\\\P(X > 525) = 0.2177\\\\P(X > 525) = 21.77 \%$

Therefore, there is 21.77% probability that a randomly selected teacher earns more than $525 a week.

How to use z-table?

Step 1:

In the z-table, find the two-digit number on the left side corresponding to your z-score. (e.g 0.7, 2.2, 1.5 etc.)

Step 2:

Then look up at the top of z-table to find the remaining decimal point in the range of 0.00 to 0.09. (e.g. if you are looking for 0.78 then go for 0.08 column)

Step 3:

Finally, find the corresponding probability from the z-table at the intersection of step 1 and step 2.

3 0

3 years ago