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3 years ago

How do I solve for x plzzzz help

Mathematics

1 answer:

jeka943 years ago

7 0

Answer:

x = -13

Step-by-step explanation:

Find LCM for 5 , 10. LCM of 5 , 10= 10

$\frac{x-3}{5}-\frac{x+1}{10}= -2\\\\\frac{(x-3)*2}{5*2}-\frac{x+1}{10}=-2\\\\\\\frac{2x-6}{10}-\frac{x+1}{10}\\\\\\\frac{2x - 6 - (x+1)}{10}= -2\\\\\\\frac{2x - 6 - x -1}{10} = -2\\\\\\\frac{2x -x - 6 - 1}{10} = -2 \\\\\\\frac{x - 7}{10} = -2\\\\\$

Cross multiply,

x - 7 = -2 * 10

x - 7 = -20

x = -20 + 7

x = -13

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the sum of the digits of two digit number is 10. when 18 is added to the number is digit reversed find and number

Contact [7]

Answer:

<em>The number is 46</em>

Step-by-step explanation:

<u>Equations</u>

Suppose:

a = One digit of the number

b = Tens digit of the number

The sum of the digits is 10:

a + b = 10

The number expressed as two-digits quantity is ab, and its value is

10a+b

When we add 18 to that number, we have:

10a+b+18

And that is represented as the number reversed:

10a+b+18=10b+a

Simplifying:

9a+18=9b

Dividing by 9:

a + 2 = b

Substituting in the first equation:

a + a + 2 = 10

2a = 8

a = 4

b = a + 2 = 6

Thus the number is 46

4 0

3 years ago

Please please help me out.........................

murzikaleks [220]

Answer:

C = 14 is the minimum value

Step-by-step explanation:

Sketch the inequalities using

2x + y = 20

with x- intercept = (10, 0) and y- intercept = (0, 20)

2x + 3y = 36

with x- intercept = (18, 0) and y- intercept = (0, 12)

Solve 2x + y = 20 and 2x + 3y = 36 simultaneously to find

The point of intersection at (6, 8))

The vertices of the feasible region are at

(0, 20), (6, 8), (18, 0)

Evaluate the objective function C = x + y at each of the vertices

(0, 20) → C = 0 + 20 = 20

(6, 8) → C = 6 + 8 = 14 ← minimum value

(18, 0) → C = 18 + 0 = 18

Minimum value is C = 14 when x = 6 and y = 8

7 0

3 years ago

Read 2 more answers

How to solve the area of composite figures

Llana [10]

Answer: Mrs.forjan???

Step-by-step explanation:

3 0

3 years ago

Please help. Write the equation of the graph. (Do not use spaces. Use ^ to represent exponents. Example 2^3 is 23.)

lana66690 [7]

This graph has a horizontal asymptote so it is an exponential graph. It also passes through two points (0,-2) and (1,3). The horizontal asymptote is at y=-3.
The unchanged exponential equation is y=a(b)^x +k
For exponential equations, k is always equal to the horizontal asymptote, so k=-3.
You can check this with the ordered pair (0,-2). After that plug in the other ordered pair, (1,3).
This gives you 3=a(b)^1 or 3=ab. If you know the base the answer is simple as you just solve for a.
If you don't know the base at this point you have to sort of guess. For example, let's say both a and b are whole numbers. In that case b would have to be 3, as it can't be 1 since then the answer never changes, and a is 1. Then choose an x-value and not exact corresponding y-value. In this case x=-1 and y= a bit less than -2.75. Plug in the values to your "final" equation of y=(3)^x -3.
So -2.75=(3^-1)-3.
3^-1 is 1/3, 1/3-3 is -8/3 or -2.6667 which is pretty close to -2.75. So we can say the final equation is y=3^x -3.
Hope this helps! It's a lot easier to solve problems like these given either more points which you can use system of equations with, or with a given base or slope.

7 0

3 years ago

How to write 47 in mayan notation

Shalnov [3]

Answer:

....

Step-by-step explanation:

so basically idk how to type it on a computer but 4 dots then under those four dots, 2 dots and a line under it

6 0

3 years ago