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3 years ago

Which pair shows equivalent expressions? Plz help me well mark brainliest! T-T

Mathematics

1 answer:

asambeis [7]3 years ago

8 0

Answer:

Option 3

Step-by-step explanation:

The first and second option can be eliminated immediately because the first equation simplified is:

2x + 10 = -2(x - 5)

2x + 10 = -2x + 10

The second equation expanded is:

-2(x + 5) = 2x - 10

-2x - 10 = 2x - 10

The third equation expanded is:

-2x - 10 = -2(x + 5)

-2x - 10 = -2x - 10

Meaning this equation is correct.

The fourth equation expanded is:

-2(x - 5) = -2x - 10

-2x + 10 = -2x - 10

Option 3 is the only correct option.

Hope this helps!

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According to the values in the table, do x and y have a proportional relationship?

Masteriza [31]

Answer:

Yes.

Step-by-step explanation:

0.4 x 100 = 40

0.5 x 100 = 50

0.6 x 100 = 60

1 x 100 = 100

Hope this helped!

6 0

3 years ago

In a class where there are a total of 80 pupils, 20 are girls and the remaining

babymother [125]

Answer:

75%

Step-by-step explanation:

First find the number of boys.

80 - 20 = 60

Now find the percentage my taking the number of boys upon the total, times that by 100 which gives the percentage.

$\frac{60}{80}$ × 100 = 75%

8 0

3 years ago

Read 2 more answers

What is a factor of the polynomial 2x^2-3x-5?

ra1l [238]

The factors are x+1 and 2x-5

3 0

4 years ago

Y=(6+3X)^2/3 Find the derivative of the function using the chain rule

fomenos

$\bf y=(6+3x)^{\frac{2}{3}}\implies \cfrac{dy}{dx}=\stackrel{chain~rule}{\cfrac{2}{3}(6+3x)^{\frac{2}{3}-1}\cdot (0+3)}
\\\\\\
\cfrac{dy}{dx}=\cfrac{2}{3}(6+3x)^{-\frac{1}{3}}\cdot 3\implies \cfrac{dy}{dx}=2(6+3x)^{-\frac{1}{3}}\implies \cfrac{dy}{dx}=\cfrac{2}{\sqrt[3]{6+3x}}$

5 0

4 years ago

A golf store purchases a set of clubs at a wholesale price of $250. Mr.Edmond learned that the clubs were marked up 200%. Is it

Luba_88 [7]

Answer: $750

Step-by-step explanation:

Hi, to answer this question, first we have to calculate the markup amount by multiplying the wholesale price of the clubs (250) by the percent increase in decimal form (divided by 100):

Mathematically speaking :

250 x (200/100) = $500 (percent increase amount)

Finally, we add the percent increase amount to the wholesale price to obtain the retail price:

250+500 =$750

Feel free to ask for more if needed or if you did not understand something.

5 0

3 years ago