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N76 [4]
3 years ago
15

What is 14x+2y=6 -7x-2y=-13

Mathematics
1 answer:
MissTica3 years ago
5 0
14x+2y=6 (1)
-7x-2y= -13 (2)

Multiply (2) by 2, we have:
-14x-4y= -26 (3)

Take (1)+(3), we can solve and get x= -1, y= 10~


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4. A pattern of growth with a constant multiplier is ______________________________.
aev [14]

blank = exponential growth.

8 0
4 years ago
A parking garage charges a $2.50 daily fee plus an hourly rate of $4.00. If you have $12.50 to pay for parking, how long can you
Vesnalui [34]

Step-by-step explanation:

First we need to set up an equation so

12.50=4x+2.50

Simplify each side by subtracting the initial fee of 2.50

10=4x

divide by 4 to isolate x

2.5=x

You can park for 2.5 hours with your budget

8 0
3 years ago
A store is having a 10% off sale. It gives an additional 20% off for an item that is above $100 after the first 10% discount.A j
Law Incorporation [45]
There are several information's already given in the question. Based on those information's, the answer can be easily deduced.

Cost of the jacket = $124.99
Percentage of discount given at the beginning = 10%
Amount of initial discount given = (10/100) * 124.99
                                                   = 12.499 dollars
                                                   = 12.50 dollars
Then
Price of the jacket after the initial discount = 124.99 - 12.50
                                                                   = 112.49 dollars
Percentage of additional discount = 20%
Amount of additional discount = (20/100) * 112.49
                                                = 22.50 dollars
Total amount saved on buying the jacket = 12.50 + 22.50
                                                                  = 35 dollars
I hope that this is the answer that you were looking for and the answer has actually come to your desired help.
8 0
3 years ago
A thermometer reading 72°F is placed in a refrigerator where the is a constant 38°F. if the thermometer reads 60°F after 2 minut
melamori03 [73]

Answer:


Step-by-step explanation:

23


4 0
4 years ago
Final exam scores are normally distributed with a mean of 74 and a standard deviation of 6. Approximately, what percentage of fi
notka56 [123]

Answer:

81.86%

Step-by-step explanation:

We have been given that final exam scores are normally distributed with a mean of 74 and a standard deviation of 6.

First of all we will find z-score using z-score formula.

z=\frac{x-\mu}{\sigma}

z=\frac{68-74}{6}

z=\frac{-6}{6}=-1

Now let us find z-score for 86.

z=\frac{86-74}{6}    

z=\frac{12}{6}=2        

Now we will find P(-1<Z) which is probability that a random score would be greater than 68. We will find P(2>Z) which is probability that a random score would be less than 86.

Using normal distribution table we will get,    

P(-1

P(2>Z)=.97725  

We will use formula P(a to find the probability to find that a normal variable lies between two values.

Upon substituting our given values in above formula we will get,

P(-1

P(-1

Upon converting 0.81859 to percentage we will get

0.81859*100=81.859\approx 81.86

Therefore, 81.86% of final exam score will be between 68 and 86.  


3 0
3 years ago
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