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OleMash [197]
3 years ago
5

-2.3x + 4.2x = 15.01 Solve for x

Mathematics
2 answers:
Neko [114]3 years ago
6 0

-2.3x + 4.2x = 15.01         original equation

1.9x = 15.01                    combine like terms

1.9x/1.9 = 15.01/1.9        divide both sides by 1.9 to get x alone

<u>x = 7.9</u>                           simplify

CHECK YOUR WORK:

<u>plug in the solution to x into the original equation like so:</u>

-2.3(7.9) + 4.2(7.9) = 15.01        original equation w/ substitute for x

-18.17 + 33.18 = 15.01                simplify multiplication

<u>15.01 = 15.01</u>                             simplify addition

<u>When you get an answer like this, you know that the solution to x that you found is correct.</u>

VashaNatasha [74]3 years ago
4 0

Answer:

x = 7.9

Step-by-step explanation:

-2.3x + 4.2x = 15.01

combine like terms

1.9x = 15.01

divide both sides by 1.9

x = 7.9

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What is the answer to this question 4(5x+30)=100?
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Answer: x = -1

Step-by-step explanation: To solve this equation, we start by distributing the 4 through the parentheses on the left side.

So we have 4 times 5x which is 20x and 4 times 30 which is 120.

So our equation now reads 20x + 120 = 100.

Solving from here, we subtract 120 from both sides of the equation and we have 20x = -20 and dividing both sides by 20, we find that <em>x = -1</em>.

4 0
3 years ago
Here's a graph of a linear function. Write the
iren [92.7K]

Answer:

Well, Your best choice is y=1/4x+ 1

Sorry, I don't have a explanation. Hope This Helps!!~

5 0
3 years ago
1. At Parker's Pizza Parlor, the total cost of an order of 5 slices of pizza is $12.37. This price includes $1. 12 in
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To find the cost of one slice 12.37/5= 2.47 per slice.

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3 0
3 years ago
How do I find the diameter and circumference when given the area?
JulijaS [17]

Hello from MrBillDoesMath!

Answer:

Diameter = 2r = 2 (sqrt(24/Pi))

Circumference =  4 sqrt(6Pi)


Discussion:

Given:

     Area  of circle =  Pi r^2

               24 = Pi r^2        =>  (as Pi r^2 is the formula for area of a circle)

               24/Pi = r^2       =>  ( now take the square root of both sides)

               r= sqrt(24/Pi)


Diameter = 2r = 2 (sqrt(24/Pi))

Circumference = 2 PI r = 2Pi (sqrt(24/Pi))

                                       = 2Pi (sqrt(24)/sqrt(Pi) )

                                       = 2Pi (2sqrt(6)/sqrt(Pi) )

                                       =  4 (pi/ sqrt(Pi) ) sqrt(6)

                                       = 4 sqrt(Pi) sqrt(6)

                                       = 4 sqrt(6Pi)


Thank you,

MrB

6 0
3 years ago
Find the midpoint of the line segment joining points A and B.<br> A(2, - 5); B(4,1)
Nookie1986 [14]

Answer:

(3, -2)

Step-by-step explanation:

Find the midpoint coordinates (x, y) of points A(2, - 5) and  B(4, 1)

x-coordinate of the midpoint is (2+4)/2 = 6/2= 3

y-coordinate of the midpoint is (-5+1)/2 = -4/2= -2

The mid point coordinates are (3, -2)

6 0
3 years ago
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