2 years ago

Review Lines and Parabolas

Mathematics

1 answer:

Virty [35]2 years ago

3 0

Answer:

Step-by-step explanation:

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3y=12x+6 in slope-intercept form

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Answer:

$\displaystyle y = 4x + 2$

Step-by-step explanation:

$\displaystyle \frac{3y}{3} = \frac{4x + 12}{3} \\ \\ y = 4x + 2$

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Suppose you add 10% of a number to the number, and then you subtract 10% of the total. Is the result greater than, less then, or

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3 years ago

Select all of the equations that are not functions.

Kryger [21]

Answer:

Step-by-step explanation:

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2 years ago

X + y = 152,<br><br> 8.5x + 12y = 1,656<br><br> How many hats were sold?

Elodia [21]

Answer:

x = 48 and y = 104

Step-by-step explanation:

Given equations are:

$x+y = 152\\8.5x+12y=1656$

From equation 1:

$x = 152-y$

Putting the value of y in equation 2

$8.5(152-y)+12y = 1656\\1292-8.5y+12y = 1656\\3.5y+1292 = 1656\\3.5y = 1656-1292\\3.5y = 364\\\frac{3.5y}{3.5} = \frac{364}{3.5}\\y = 104$

Now we have to put the value of y in one of the equation to find the value of x

Putting y = 104 in the first equation

$x+y = 152\\x+ 104 = 152\\x = 152-104\\x = 48$

Hence,

The solution of the system of equations is x = 48 and y = 104

The value of variable which was assumed for number of hats, is the total number of hats.

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3 years ago