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3 years ago

Solve 12 - 4x = 8 Really bad at algebra, please help :) XD

1 answer:

7 0

Remember, whatever you do to one side of the equation you have to do to the other. The end goal of this is the solidify the variable on one side of the equation.

So, you start with 12 -4x=8. You want to try and get the variable alone on one side, so you would subtract 12 from both sides, resulting in the equation

-4x=-4 Next, to continue to get the variable alone, you would have to undo the coefficients multiplication by dividing both sides by -4.

So, you get x=1 as your answer.

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At the movie theatre, child admission is $5.40 and adult admission is $8.70 . on friday, 159 tickets were sold for a total sales

blondinia [14]

Alright this is gonna be a long one

Lets called child tickets x and adult tickets y

so x + y should be equal to 159 since they said that the total sum of the tickets is 159
so thats your first equation : x + y = 159

next form an equation using the prices,
5.40x + 8.70y = 1079.70

now that you have your two equations, just substitute the first into the second (you could either substitute for x or y by saying x = 159-y or that y=159-x)

Hope this helps.

7 0

3 years ago

What is y = X2 + 6x + 9 is x = -3

Triss [41]

Answer:

y = 0

Step-by-step explanation:

x = -3

y = x² + 6x + 9

y = (-3)² + 6(-3) + 9

y = 9 - 18 + 9

y = 0

4 0

3 years ago

The lower supports are and the area of the two supports is square meters. The upper arch can be decomposed as one semicircle wit

Galina-37 [17]

Answer:

The lower supports are Congruent Rectangles and the area of the two supports is 24 square meters.

The upper arch can be decomposed as one semicircle with radius 6 meters minus a semicircle with radius 3 meters.

The area of the archway is (13.5 π + 24) square meters.

Step-by-step explanation:

See attachment for the firgure,

In order to determine the area of archway = The area of upper support + area of lower support.

As given, the lower support are two congruent rectangles consists of dimension 3 m × 4 m

Therefore, the area of lower support can be written as,

The area of lower support = 3 × 4 + 3 × 4 = 12 + 12 = 24 square m.

Now, the upper support arch can be decomposed as the two concentric semi circles having radius 3 m and 6 m,

Hence, the area of the upper support = Area of semi circle having radius i.e 6 m - Area of semi circle having radius i.e 3 m

=> π6²/2 - π3²/2= 27π/2= 13.5π square m

Therefore, the area of the archway = (13.5 π + 24) square meters

4 0

4 years ago

Please help me solve this! Very urgent :(

ValentinkaMS [17]

Answer:

last one

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

What is the vertex of the parabola -2=3(x+3)^2?

Volgvan

Answer:

P(-3 , -2)

Step-by-step explanation:

7 0

3 years ago