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4 years ago

NEED HELP ASAP 30 POINTS

Mathematics

2 answers:

ElenaW [278]4 years ago

6 0

Answer:

41,583

Step-by-step explanation:

marissa [1.9K]4 years ago

6 0

41,583 is the answer

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Are -4(x+3) and 1/3(18x+36)-10x

vlada-n [284]

They are not equal if thats the question

-4(x+3) = -4x-12

1/3(18x+36)-10x =-4x+12

one has -12 and the other has +12

3 0

3 years ago

Code.<br> -3x + 4y = -8<br> 8x - y = 16<br> Solving systems by substitution

LiRa [457]

Answer:

The solution to the system of equations is $\displaystyle \big(\frac{56}{29}, -\frac{16}{29}\big)$ .

Step-by-step explanation:

We are given a system of equations:

$\displaystyle \left \{ {{-3x+4y=-8} \atop {8x-y=16}} \right.$

We need to solve these by substitution, so we need to solve one equation for a variable and then substitute the value of that variable into the other equation.
After doing this and solving for the opposite variable, we need to insert this into the original equation and solve for the initial variable.
Therefore, to solve one of the equations, we will solve it to put it in slope-intercept form and solve for y. The easier equation to work with is equation two.

$\displaystyle 8x - y = 16\\\\-y = -8x + 16\\\\\frac{-y}{-1}=\frac{-8x+16}{-1}\\\\y = 8x - 16$

Now, we've solved for y. So, we can substitute this into either equation and solve for x.

$\displaystyle -3x + 4(8x -16)=-8\\\\-3x + 32x - 64 = -8\\\\29x - 64 = -8\\\\29x = 56\\\\\frac{29x}{29}=\frac{56}{29}\\\\x = \frac{56}{29}$

Now, we substitute our value for x into one of the original equations and solve for y.

$\displaystyle 8\big(\frac{56}{29}\big)-y=16\\\\-y = 16 - 8\big(\frac{56}{29}\big)\\\\-y=\frac{16}{29}\\\\\frac{-y}{-1}=\frac{\frac{16}{29}}{-1}\\\\y = -\frac{16}{29}$

Therefore, the solution to our system of equations is:

$\displaystyle \big(\frac{56}{29}, -\frac{16}{29}\big)$

8 0

3 years ago

What is the equation of a vertical line passing through the point (-4, 7)?

Marysya12 [62]

Answer:

Step-by-step explanation:

vertical line is parallel to y-axis so its equation is always x = x₀

at any given point we have coordinates: (x₀, y₀)

given point (-4, 7) means x₀ = -4

so the equation of a vertical line passing through the point (-4, 7) is x=-4

6 0

3 years ago

Bruce saved $35.00 to buy a new video game. The game's original price was $42.00, but it was on sale for 30% off. The sales tax

olga2289 [7]

Yes because if the original price is $42 and you take off the 30% it will be 12.6 plus the sale tax rate it will be $13.10 and he will have $21.90 left

5 0

3 years ago

Fun Zone charges an entrance fee

Readme [11.4K]

Answer:

2 tickets

Step-by-step explanation:

To be the same they must equal each other.

4.50 + 0.65x = 0.40x + 5

isolate the variable

subtract 4.50 from both sides

0.65x = 0.40x + 0.50

subtract 0.40x from both sides

0.25x = 0.50

divide both sides by 0.25

x = 0.50 ÷ 0.25

x = 2

5 0

3 years ago