3 years ago

Question 21 of 25

Mathematics

1 answer:

Korvikt [17]3 years ago

3 0

Answer:

Step-by-step explanation:

Coefficient is the number before the variable

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Need help to understand this question thank you :)

Novosadov [1.4K]

Complementary angles add up to equal 90 degrees. Knowing this, you can subtract 68 from 90. 90-68=22.

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mina [271]

Answer:

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Step-by-step explanation:

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What is 2+2 equal?<br><br> this one is so hard, like how do people get this:)

Fittoniya [83]

Answer:

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Step-by-step explanation:

2 + 2 = 4

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What are the solutions to the following system? StartLayout Enlarged left-brace 1st row negative 2 x squared + y = negative 5 2n

Yakvenalex [24]

Answer:

$(\sqrt{2},-1),(-\sqrt{2},-1)$

(StartRoot 2 EndRoot, negative 1) and (negative StartRoot 2 EndRoot, negative 1)

Step-by-step explanation:

we have

$-2x^{2} +y=-5$ ----> equation A

$y=-3x^{2} +5$ -----> equation B

solve by substitution

substitute equation B in equation A

$-2x^{2} +(-3x^{2} +5)=-5$

solve for x

$-5x^{2} +5=-5$

$-5x^{2}=-10$

$x^{2}=2$

$x=\pm\sqrt{2}$

<em>Find the value of y</em>

$y=-3x^{2} +5$

For $x=\sqrt{2}$ ----> $y=-3(\sqrt{2})^{2} +5=-1$

For $x=-\sqrt{2}$ ----> $y=-3(-\sqrt{2})^{2} +5=-1$

therefore

The solutions are

$(\sqrt{2},-1),(-\sqrt{2},-1)$

(StartRoot 2 EndRoot, negative 1) and (negative StartRoot 2 EndRoot, negative 1)

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