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katovenus [111]
3 years ago
15

Simplify (25x^2-14xy+4)-(7x^2-9y)+(2xy+7)

Mathematics
1 answer:
givi [52]3 years ago
5 0
First distribute the negative to the second equation which would give you:

25x^2 - 14xy + 4 -7x^2 + 9y + 2xy + 7

Since addition is commutative. you can now just add like terms.

18x^2 - 12xy + 9y + 11
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Find the rule. *
DiKsa [7]

Answer:

y = x - 7

Step-by-step explanation:

You take each equation and sub in for x and y.

The first equation would look like this:

16 = 2(23) - 30  Then you answer looks like this:

16 = 16 but if you did that for the second set in the column it looks like this:

18 = 2(25) - 30

18 = 50 - 30

18 = 20 which does not equal canceling the first answer.

And the second answer doesn't make sense because if x > y you shouldn't add to x. The same goes for the third answer.

So that leaves only one answer y = x - 7

Hope this helps

Sorry if this answer is long

GeneralGranato777

7 0
2 years ago
I NEED HELP PLEASE :(
exis [7]
Answer: 3rd choice is the right answer
4 0
3 years ago
What is the volume of a triangular prisim if the length is 4cm heigght is 3cm and width is 11cm
aniked [119]

Volume is a three-dimensional scalar quantity. The volume of the triangular prism is 66cm².

<h3>What is volume?</h3>

A volume is a scalar number that expresses the amount of three-dimensional space enclosed by a closed surface.

Given the length of the triangle is 4cm, while the width of the triangle is 11cm, therefore, the area of the base of the triangle will be,

Area of triangle = 0.5 × 4cm × 11cm

Area of triangle = 22 cm²

Now, the volume of the prism with a base area of 22cm² and a height of 3 cm is,

Volume of the triangular prism = 22cm² × 3cm = 66cm³

Hence, the volume of the triangular prism is 66cm².

Learn more about Volume:

brainly.com/question/13338592

#SPJ1

5 0
2 years ago
Mr. Petersen counted the number of coins collected by the students in his coin club and prepared the following line plot.
zimovet [89]

Answer:21

Step-by-step explanation:

Add them all up

8 0
3 years ago
2x+4=18 <br> what does 'x' equal?
astra-53 [7]

Answer:

7

Step-by-step explanation:

18-4

=14

÷2

=7.

hoped this helped

5 0
3 years ago
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