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igor_vitrenko [27]
3 years ago
10

Find the solution to the following system of equations using matrices: 2x+6y=3 -5x+y=4

Mathematics
1 answer:
svetlana [45]3 years ago
8 0
I CAME UP WITH THIS  (-23/32,23/32)
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Tell whether the sequence is arithmetic if it is identify the common difference -9,-17,-26,-33
aleksklad [387]
No it is not, there is no common difference. <span />
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3 years ago
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Jess deposited $5,000 into an account that earns simple interest. After 9 years, Jess had earned $3,150 in interest. What was th
musickatia [10]

Answer:

The interest rate of Jess's account was 7%

Step-by-step explanation:

A = P * (1 + rt)

A = final amount

P = initial principal balance

r = annual interest rate

t = time (in years)

Replacing with the values we know:

A =  P * (1 + rt)

8,150 = 5,000 * (1 + r * 9)

8,150/5,000 = 1 + 9r

1.63 = 1 + 9r

1.63 - 1 = 9r

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The interest rate of Jess's account was 7%

4 0
2 years ago
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Simplifying an algebra -3(y+2)
Brrunno [24]

Answer: -9y


Step-by-step explanation:

Step1: -3 is multiplied by y = -3y

Step 2: -3 multiplied by 2 = -6

Step 3: -3y + -6

6 0
3 years ago
Find the value of Q in the following system so that the solution to the system
lisabon 2012 [21]

Answer:

<h2>Q = -6</h2>

Step-by-step explanation:

If the solution of the system of equations is {(x, y): x - y = 4} - infinitely many solutions, then this system is consistent and dependent.

x - 3y = 4            <em>multiply both sides by 2</em>

2x - 6y = 8

Therefore Q = -6

8 0
3 years ago
The heights of 500 students at a local school were recorded and found to be approximated by the normal curve below. Which
Sunny_sXe [5.5K]

Answer:

option C.

Step-by-step explanation:

The given graph is the bell shaped graph.

From the graph we can observe that the peak is at 69.

So, the mean of the data is = 69 .

Standard deviation is the deviation of the graph from the mean value.

 =  72-69 = 3

Hence, the standard deviation is equal to 3.

So, the correct answer is option C.

5 0
2 years ago
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