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3 years ago

I’ll mark you brainliest answer if you answer it correctly

Mathematics

1 answer:

OlgaM077 [116]3 years ago

3 0

Answer:

A (Associative Property)

Step-by-step explanation:

The equations are not equivalent

(7 - x) - 5 ≠ 7 - (x -5) because

7 - x - 5 ≠ 7 -x + 5

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A rectangular fish tank has a base that is 9 inches

vivado [14]

Answer:

I will answer when i get back

Step-by-step explanation:

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3 years ago

Describe and correct the error in writing 8% as a fraction

PtichkaEL [24]

$p\%=\dfrac{p}{100}\\\\8\%=\dfrac{8}{100}=\dfrac{8:4}{100:4}=\dfrac{2}{25}$

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3 years ago

What is the GFC OF 8, 12, 32

Sindrei [870]

The GCF of 8, 12, and 32 is: 4

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3 years ago

Read 2 more answers

Apply Crammer's Rule to find the solution to the following quations .2x + 3y = 1, 3x + y = 5

Bond [772]

Answer:

The solution to the equation system given is:

<u>x = 2</u>
<u>y = -1</u>

Step-by-step explanation:

First, we must know the equations given:

2x + 3y = 1
3x + y = 5

Following Crammer's Rule, we have the matrix form:

$\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] =\left[\begin{array}{ccc}x\\y\end{array}\right] = \left[\begin{array}{ccc}1\\5\end{array}\right]$

Now we solve using the determinants:

$x=\frac{\left[\begin{array}{ccc}1&3\\5&1\end{array}\right]}{\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] } =\frac{(1*1)-(5*3)}{(2*1)-(3*3)} = \frac{1-15}{2-9} =\frac{-14}{-7} = 2$

$y=\frac{\left[\begin{array}{ccc}2&1\\3&5\end{array}\right]}{\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] } =\frac{(2*5)-(3*1)}{(2*1)-(3*3)}=\frac{10-3}{2-9} =\frac{7}{-7}=-1$

Now, we can find the answer which is x= 2 and y= -1, we can replace these values in the equation to confirm the results are right, with the first equation:

2x + 3y = 1
2(2) + 3(-1)= 1
4 - 3 = 1
1 = 1

And, with the second equation:

3x + y = 5
3(2) + (-1) = 5
6 - 1 = 5
5 = 5

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3 years ago

The whole number 4 is equivalent to what percent?

Zarrin [17]

This would be 400%. To get a percent you multiply the number by 100. For example, .62 x 100 equals 62%.

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4 years ago