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AlexFokin [52]
3 years ago
10

Which matrix represents the system of equations shown below? 4x - 2y = 8 2x-3y = 12

Mathematics
1 answer:
Serjik [45]3 years ago
3 0

Answer:

4x-2y=8

or, 4x = 8+2y

or x = 8+2y/4-----(eq.1)

2x-3y=12-----(eq.2)

Now,

putting value of eq.1 in eq.2, we get

2x-3y=12

or, (8+2y/4)-3y = 12

or, 8-10y/4=12

or, 8-10y=12×4

or,8-10y=48

or,-10y=48-8

or,y=40/-10

or, y = -4

again,

2x-3y=12

or, 2x-3×-4=12

or, 2x+12=12

or, x=0

In 1st option

4x-2y=8

or,4×0-2×-4=8

or,0+8=8

8=8

2x-3y=12

2×0-3×-4=12

0+12=12

12=12

So 1st option is true

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No

Step-by-step explanation:

Well like how the ounce is the smallest a ton is the biggest.For example, it makes more sense to describe the weight of a human being in pounds rather than tons.

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3 years ago
Which expression has a value of 23?
DaniilM [7]
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B) -3 - 20 = \fbox {-23}

C) 10 - 13 = \fbox {-3}

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You were correct, the exact answer is A. The others do not equal 23 besides that one. Good job!
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3 years ago
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If f(x)=3x^2+1 and g(x) =1-x, what is the truly value of (f-g)(2)
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Answer:

14

Step-by-step explanation:

f(x)=3x²+1

f(2) = 3 x 2² + 1 = 13

g(x) =1-x

g(2) = 1 - 2 = -1

(f-g)(2) f(2) - g(2) = 13 - (-1) = 14

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Katie grew 26 flowers with 13 seed packets. With 55 seed packets, how many total flowers can Katie have in her garden?
Leokris [45]
110 flowers in her garden.
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The average student-loan debt is reported to be $25,235. A student believes that the student-loan debt is higher in her area. Sh
yulyashka [42]

Answer:

Step-by-step explanation:

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

µ = 25235

For the alternative hypothesis,

µ > 25235

This is a right tailed test.

Since the population standard deviation is not given, the distribution is a student's t.

Since n = 100,

Degrees of freedom, df = n - 1 = 100 - 1 = 99

t = (x - µ)/(s/√n)

Where

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µ = population mean = 25235

s = samples standard deviation = 6000

t = (27524 - 25235)/(6000/√100) = 3.815

We would determine the p value using the t test calculator. It becomes

p = 0.000119

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3 years ago
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