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sergij07 [2.7K]
3 years ago
14

Use the diagram below to classify ABCD. Select all that apply.

Mathematics
2 answers:
ICE Princess25 [194]3 years ago
7 0
ABCD is a square and a quadrilateral
Bumek [7]3 years ago
6 0
Abc does is a square and Audi later
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Need help finding the x, y, and z. please and thank you
Reptile [31]

The first step in any problem is to look at what you are given. When solving systems of linear equations, it is often helpful to eliminate one or more of the variables by adding or subtracting a multiple of one equation with a multiple of another. It is convenient when at least one of the multipliers is 1.

Here, we can cancel the y-terms in the 2nd and 3rd equations simply by adding them together. This gives

... (5x +y -4z) +(-3x -y +5z) = (41) +(-45)

... 2x +z = -4 . . . . simplified

Likewise, we can add 3 times the second equation to the first to cancel y in that sum.

... 3(5x +y -4z) +(2x -3y +z) = 3(41) + (-1)

...15x +3y -12z +2x -3y +z = 123 -1

...17x -11z = 122 . . . . simplified

Now that we have 2 equations in x and z, we can go through the same process. We observe that the coefficient of z is +1 in the first equation and -11 in the second. The means we can cancel the z terms by adding 11 times the first equation to the second:

... 11(2x +z) +(17x -11z) = 11(-4) +122

...22x +17x = 78 . . . . . . simplify a little bit

... x = 78/39 = 2 . . . . . . divide by 39

From above, we find

... z = -4 -2x = -4 -2·2 = -8

... y = 41 -5x +4z = 41-5(2) +4(-8) = 41 -42 = -1

The solution is (x, y, z) = (2, -1, -8).

_____

The method of elimination used here will vary with the system of equations. If you want to employ a consistent method, you can use Cramer's Rule, Gaussian elimination, or matrix methods. Since you apparently don't mind help from technology, learning to do this on your graphing calculator can also be a good idea.

4 0
3 years ago
The ratio of clown fish to angel fish at a pet store is 5:4 the ratio of angel fish to goldfish is 4:3 there are 60 clown fish a
padilas [110]
There is 4 angel fish and 3 goldfish
3 0
3 years ago
Giving brainliest *easy*!!
makvit [3.9K]

Answer:

1130.97

Step-by-step explanation:

It was easy!

8 0
2 years ago
Please help i dont know
pantera1 [17]

Answer:

luke is correct

Step-by-step explanation:

3 ÷ 3 ÷ 7 = 0.142857

\frac{1}{3} × \frac{3}{7} = 0.142857

4 0
2 years ago
Ms. Nellies has 2 1/2 pints of vinegar for her students to use in a science experiment. Each
adoni [48]

Answer:

incorrect

2 1/2 divided by 3/4

2 1/2 divided by 3/8 = 6 2/3

6

hope that helped i checked it over im positive its correct

5 0
3 years ago
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