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2 years ago

9

Can anyone help me please

2 answers:

brilliants [131]2 years ago

8 0

Answer:

Here you go

Step-by-step explanation:

Maksim231197 [3]2 years ago

7 0

I think the guy above me is right

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What are the solutions to the following system?

bija089 [108]

The solutions are $(\sqrt{2},-1) \text { and }(-\sqrt{2},-1)$ .

Solution:

Given equation:

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

Add $2 x^{2}$ on both sides.

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

$y=-5+2 x^{2}$ -------- (1)

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

Equate (1) and (2).

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

Add $3 x^{2}$ on both sides.

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

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

Add 5 on both sides.

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

$5x^{2}=10$

Divide by 5 on both sides, we get

$x^{2}=2$

Taking square root on both sides, we get

$x=\sqrt{2}, x=-\sqrt{2}$

Substitute $x=\sqrt{2}$ in (1).

$y=-5+2(\sqrt{2})^2$

$y=-5+4$

$y=-1$

Substitute $x=-\sqrt{2}$ in (1).

$y=-5+2(-\sqrt{2})^2$

$y=-5+4$

$y=-1$

Therefore the solutions are $(\sqrt{2},-1) \text { and }(-\sqrt{2},-1)$ .

Option C is the correct answer.

6 0

3 years ago

Find the equation of the axis of symmetry for the parabola y = x^2 .

Tamiku [17]

The vertex of the parabola is <span><span>(<span>2,1</span>)</span><span>(<span>2,1</span>)</span></span> .

So, the axis of symmetry is the line <span><span>x=2</span><span>x=2</span></span> .

6 0

3 years ago

Read 2 more answers

The store rents wigs by the hour. He spent $40 to rent a wig for 8 hours. Write an equation to represent the relationship.

Vlada [557]

40 divided by 8 = 5

Mark Me Brainliest Please

8 0

2 years ago

Help Me Please I will give brainliest if correct!

il63 [147K]

Answer:

9 $c^{7}$

Step-by-step explanation:

$c^{-4}$ is equal to $\frac{1}{c^{4} }$ . $\frac{9c^{3} }{\frac{1}{c^{4} } }$ is equal to $9c^{7}$ .

3 0

2 years ago

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Use order of operations to simplify.<br><br> 4 - 10 + 12 / 3 + (7^2 - 7)

Usimov [2.4K]

Order of Operations = Please Excuse My Dear Aunt Sally, PEMDAS. P= Parentheses E=Exponents M= Multiplication D= Division A= Addition and S= Subtraction in that order.

The answer
4-10+12/3+(7^2-7)
4-10+12/3+(49-7)
4-10+12/3+56
4-10+4+56
4-14+56
4-70
-66

-66 should be your answer if i’m not mistaken

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2 years ago