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KatRina [158]
4 years ago
6

Solve each system of equations 2x- 5y = 7 3x - y = -9

Mathematics
1 answer:
Darina [25.2K]4 years ago
8 0

Answer:

x = -4; y = -3

Step-by-step explanation:

2x - 5y = 7

3x - y = -9

Rewrite top equation. Multiply both sides of bottom equation by -5. Add equations. This eliminates y, and we solve for x.

         2x - 5y = 7

(+)   -15x + 5y = 45

----------------------------

      -13x         = 52

Divide both sides by -13.

x = -4

Substitute -4 for x in the first original equation and solve for y.

2x - 5y = 7

2(-4) - 5y = 7

-8 - 5y = 7

-5y = 15

y = -3

Answer: x = -4; y = -3

-5 =

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Tcecarenko [31]

The difference in the given function is x^3 + 7x^2 - 3x - 14

<h3>Difference of functions</h3>

Given the following functions

f(x) = 5x^2 − 3x + 5

g(x) = 19 − x^3 − 2x^2

Determine the difference of the function

f(x) - g(x) =5x^2 − 3x + 5 - (19 − x^3 − 2x^2)

f(x) - g(x) = 5x^2 - 3x + 5 - 19 + x^3 + 2x^2

Collect the like terms

f(x) - g(x) = x^3 + 5x^2 + 2x^2 - 3x + 5 - 19

f(x) - g(x) = x^3 + 7x^2 - 3x - 14

Hence the difference in the given function is x^3 + 7x^2 - 3x - 14

Learn more on polynomial difference here: brainly.com/question/2516456

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2 years ago
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Ray Of Light [21]

Answer:MAn article is

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2 years ago
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Mason is thinking of a number. Four less than three times is the number eleven. What is the number?
ELEN [110]
5.

5x3=15

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3 0
3 years ago
What is the equation of the trend line in the scatter plot ?
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Answer:

5

Step-by-step explanation:

Hopebthis helps it ahowed right for me

6 0
3 years ago
Help me please ASAP
Mashutka [201]

Answer: \frac{5}{35}

Step-by-step explanation:

Since, the total number of contestant = 7,

Thus, the probability that out of 3 contestant, me and my friend is chosen

= \frac{2_C_2\times 5_C_1}{7_C_3}

= \frac{\frac{2!}{2!0!}\times \frac{5!}{1!\times 4!}}{\frac{7!}{4!\times 3!}}

= \frac{1\times 5}{\frac{7\times 6\times 5\times 4!}{4!\times 6}}

=  \frac{5}{35}

⇒ Third Option is correct.

4 0
3 years ago
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