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melamori03 [73]
3 years ago
12

What is 2.50x + 4x = 39

Mathematics
2 answers:
34kurt3 years ago
4 0
2.5x + 4x = 39
6.5x = 39
x = 39 / 6.5
x = 6
Anastasy [175]3 years ago
4 0

For the equation 2.50x + 4x = 39

x=6

First, 2.50 + 4x are adding like terms, which mean they can be added together.

2.50x + 4x= 6.40x

39/6.40= 6

x=6

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-1/4x+3=-3/2x-2 what is this equivalent to
frozen [14]

Pick any number for n        n(y) = n(3/2x + 4)        n(y) = n(3/2x) + n(4) 
7 0
3 years ago
Match the steps to find the equation of the parabola with focus (-1, 2) and directrix x = 5.
Archy [21]

Answer:

The matched options to the given problem is below:

Step1: Choose a point on the parabola

Step2: Find the distance from the focus to the point on the parabola.

Step3: Use (x, y).

Find the distance from the point on the parabola to the directrix.

Step4: Set the distance from focus to the point equal to the distance from directrix to the point.

Step5: Square both sides and simplify.

Step6: Write the equation of the parabola.

Step by step Explanation:

Given that the focus (-1,2) and directrix x=5

To find the equation of the parabola:

By using focus directrix property of parabola

Let S be a point and d be line

focus (-1,2) and directrix x=5 respectively

If P is any point on the parabola then p is equidistants from S and d

Focus S=(-1,2), d:x-5=0

Step1: Let P(x,y) be any point on parabola

Step2: Therefore the d=\sqrt{(x+1)^2+(y-2)^2}\hfill (1)

Step3: The perpendicular distance from p to d is

\frac{|x-5|}{\sqrt{(-1)^2+2^2}}

=\frac{|x-5|}{\sqrt{5}}\hfill (2)

Step4: equating (1) and (2)

\sqrt{(x+1)^2+(y-2)^2}=\frac{|x-5|}{\sqrt{5}}

Step5: squaring on both sides

(x+1)^2+(y-2)^2=\frac{|x-5|^2}{5}

5[(x+1)^2+(y-2)^2]=(x-5)^2

5[x^2+2x+1+y^2-2y+4-x^2+10x-25]=0

12x+y^2-2y-24=0

Step6: Equation of the parabola is

y^2-2y+12x-24=0

8 0
3 years ago
a piece of wood used for construction is 2 inches by 4 inches by 24 inches. what is the surface area of the wood
FrozenT [24]
2*2*4+2*2*24+2*4*24
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304 is the answer
8 0
3 years ago
A. (0, -2)
Anastaziya [24]

Answer: D

Step-by-step explanation: edge

3 0
3 years ago
What is the exterior angle?
olganol [36]

Answer:

angle YUT = 120

Step-by-step explanation:

in Triangle SUT

angle 70 + angle 50 + angle x = 180

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angle SUT = 60



angle SUT + angle YUT = 180 ( straight line)

60 + x = 180

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Therefore angle YUT ( exterior angle ) = 120

7 0
3 years ago
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