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borishaifa [10]

2 years ago

15

Complete the proportion to compare the first two triangles

1 answer:

lukranit [14]2 years ago

6 0

12 and 13 because elmo

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What's the inverse of a 2x4 matrix?

balandron [24]

Mxn Matrices do not have an inverse solution for m ≠ n, so your 2x4 will not have a solution.

<span>Generally, inverting matrices is done through finding the determinant of the square matrix and then performing an operation on the matrix based on the size of the matrix. </span>

<span>Wikipedia has a good article on Matrix inversion, take a look there for more information.</span>

8 0

2 years ago

Solve using the elimination method:<br> X-3y=7<br> 3x + 3y=9

sergij07 [2.7K]

Answer:

$x=4\\\\y=-1$

Step-by-step explanation:

Given Equation:

$x-3y=7$ Equation:1

$3x + 3y=9$ Equation:2

Dividing Equation:2 by '3' both the sides:

$x+y=3$

or $x=3-y$ Equation:3

Putting the vale of 'x' in Equation:1

$x-3y=7$

$(3-y)-3y=7\\\\3-y-3y=7\\\\3-4y=7\\\\$

Subtracting '3' both sides

$-4y=7-3\\\\-4y=4$

$y=\frac{4}{-4}$

$y=-1$

Putting value of 'y' in Equation:3

$x=3-y$

$x=3-(-1)\\\\x=3+1\\\\x=4$

The solution of the equations is :

$x=4\\\\y=-1$

7 0

3 years ago

Describe and correct the error made in finding the product. <br><br> Please explain what's wrong

qaws [65]

Okay, it's wrong because they forgot to do -2 times 3x.
The correct answer is $3^{2}$ -2x-8
Hope i got is correct!

5 0

2 years ago

Rewrite the decimal 47.4 as a mixed number

prohojiy [21]

Answer:

47 and 2/5

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

A senior class at Smith High School has 84 students.

sattari [20]

Answer: 44 boys and 40 girls

Step-by-step explanation:

x = number of girls

x + 4 = number of boys

x + x + 4 = 84

2x + 4 = 84

2x = 80

x = 40

84 - 40 = 44

3 0

3 years ago