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Amiraneli [1.4K]

2 years ago

7

Why are the solutions to the proportions StartFraction 40 over 8 EndFraction = StartFraction x over 10 EndFraction and StartFrac

tion x over 40 EndFraction = StartFraction 10 over 8 EndFraction the same?

2 answers:

seraphim [82]2 years ago

6 0

Answer:

50

Step-by-step explanation:

no need

Annette [7]2 years ago

5 0

Answer:Because both result in the equation 8x = 400 which simplifies to 50.

Step-by-step explanation:

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Please answer ASAP! An explanation is a MUST REQUIREMENT in order to receive points and the Brainliest answer. Thank you.

alexdok [17]

Group and factor/undistribute

(x^2y^3-2y^3)+(-2x^2+4)
(y^3)(x^2-2)+(-2)(x^2-2)
see the (x^2-2) is common term so undistribute
(x^2-2)(y^2-2)

last one

4 0

2 years ago

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

Rewrite the expression with rational exponents as a radical expression by extending the properties of integer exponents.

IrinaVladis [17]

Here you go, hope this helps :)

4 0

2 years ago

2<br> If = X – 1= 4, then x =<br> x – ,<br> 3

GalinKa [24]

Answer:

X=15/2

Step-by-step explanation:

hope it helps you

have a great day

3 0

2 years ago

Read 2 more answers

Which equation is not equivalent to 2x+10=-8

Vlada [557]

Answer:

2x+10=-8

x=9

3x=9

x=3

2x=8

x=4

4x=20

x=5

Step-by-step explanation:

4 0

2 years ago