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2 years ago

5 (2x-4)-3 (x-2)=4x-2

Mathematics

1 answer:

lutik1710 [3]2 years ago

5 0

Step-by-step explanation:

10x - 20 - 3x + 6 = 4x - 2

10x - 3x - 4x = 20 - 6 - 2

3x = 12

3x/3 = 12/3

x = 4

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NEED HELP ASAP!! (25 POINTS)

sergij07 [2.7K]

Answer:

Step-by-step explanation:

i taken this earlier today

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3 years ago

Javier estimates the square root of 18 in the following way: √18=2√9=2*3=6 Explain why her reasoning is incorrect. Without using

Hunter-Best [27]

Answer:

Javier estimates the square root of 18 in the following way: √18=2√9=2*3=6 Explain why her reasoning is incorrect. Without using a calculator, the square root of 18 will be between what two values (remember to look for perfect squares/perfect square roots)? Show your reasoning. You do not need to find the decimal equivalent of the root.

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2 years ago

Read 2 more answers

Two cars leave at the same time from points A and B, the distance between them is 280 km. If the cars meet each other, they’ll m

kykrilka [37]

Set up the following equations:

$2x + 2y = 280$

$14x - 14y = 280$

x represents car A's speed, and y represents car B's speed.

We'll use elimination to solve this system of equations. Multiply the first equation by 7:

$(2x + 2y = 280) * 7 = 14x + 14y = 1960$

$14x - 14y = 280$

Combine both equations:

$28x = 2240$

Divide both sides by 28 to get x by itself:

$x = 80$

The speed of car A is 80 mph.

Since we now know the value of one of the variables, we can plug it into the first equation:

$2(80) + 2y = 280$

$160 + 2y = 280$

Subtract 160 from both sides.

$2y = 120$

Divide both sides by 2 to get y by itself:

$y = 60$

The speed of car B is 60 mph.

7 0

3 years ago

Brainliest first & correct!

Ilia_Sergeevich [38]

Answer: Choice A

y = -3(x+2)^2 + 10

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Work Shown:

y = -3x^2-12x-2 is in the form y = ax^2+bx+c with

a = -3

b = -12

c = -2

The x coordinate of the vertex is

h = -b/(2a)

h = -(-12)/(2*(-3))

h = 12/(-6)

h = -2

We'll plug this into the original equation to find the corresponding y coordinate of the vertex.

y = -3x^2-12x-2

y = -3(-2)^2-12(-2)-2

y = 10

So k = 10 is the y coordinate of the vertex.

Overall, the vertex is (h,k) = (-2,10)

Meaning that we go from this general vertex form

y = a(x-h)^2 + k

to this

y = -3(x - (-2))^2 + 10

y = -3(x+2)^2 + 10

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3 years ago

Line L has equation 2x - 3y = 5.

Misha Larkins [42]

Y = 2/3x - 12

You can get this because they will have the same slopes and you can solve for the intercept.

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2 years ago