MATHEMATICS MIDDLE SCHOOL

What is 72 tens - 12tens

Answers

Answer 1
Answer: Solve:-

72 tens - 12 tens
72 tens - 12 tens = 72 - 12 = 60
72 tens - 12 tens = 60 tens 

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the fair committe hopes to raise $10,000 for charity a book of 15 ride tickets costs$12.How many books does the committee need to sell to reach their goal

Answers

10,000 divided by 12 that is how you get your answer.

4x + 12 = -7y
-y + 12 = 4x
Solve with elimination

Answers

Take the second equation and flip it around so the y on the left ends up on the right and the 4x on the right ends up on the left.  This makes all negatives positive and all positives negative.   -4x   + 12  = y 

Then add the first equation to the second equation 
4x   +12   = -7y
-4x   + 12  = y    this eliminates the x's
          24 = - 6y            then divide by - 6
           - 6     - 6
         - 4    = y

So if you know that y = negative 4, you can substitute into either equation.  I pick the second one because I am a lazy person.  
  -y  + 12  = 4 x
-(-4) + 12 = 4 x     combine your numbers
     16      = 4 x        then divide by 4
       4      =  x
So your solution is: x = 4 and y = -4 or this is also written (4, -4)

Does that work for you?
\begin{cases}4x + 12 = -7y \n -y + 12 = 4x \end{cases} \n \n\begin{cases}4x + 7y = -12 \n -4x-y =-12 \end{cases} \n+ ------- \n6y=-24\ \ /:6\n \ny=-(24)/(6)\n \ny=-4

4x+12=-7y\n \n 4x+12=-7*(-4)\n \n4x=28-12\n \n4x=16\ \ /:4\n \nx=(16)/(4)\n \n x=4 \n \n \begin{cases}x=4 \n y=-4 \end{cases}

What are the solutions of 4x^2+16x=9

Answers

Answer:

Step-by-step explanation:

Ethan, this is a quadratic equation.  We should rewrite this in standard quadratic form:  4x^2 + 16x - 9 = 0.  Let's use the quadratic formula approach to solve this:

The coefficients of x are a = 4, b = 16 and c = -9.  Thus, the discriminant is

b^2 - 4ac, or 16^2 - 4(4)(-9), or 256 - 144, or 112.

The two solutions are real and are as follows:

       -16 ± √112            -16 ± √(16*7)         -16 ± 4√7

x = -------------------   = ----------------------- = -----------------

            2(4)                            8                        8

Or, after simplification,

       -4 ± √7

x = --------------

             2

PLEASE HELP MEEEEE. Write an equation for the line that passes through the points (2,0) and (0,-3). Remember that drawing a diagram (in this case, drawing a graph) can be very helpful.​

Answers

Answer:

y = 3/2x - 3

Step-by-step explanation:

see the pic for the steps

What is true regarding chords and diameters of circles?A. both cords and diameters have two endpoints on a circle. Diameters must intersect the center of a circle.

B. both chords and diameters have two endpoints on a circle. Chords must intersect the center of a circle

C. Chords have two endpoints on a circle. Diameters have one endpoints on a circle and one at the center

D. Chords have one endpoint on a circle and one at the center. Diameters have two endpoints on a circle

Answers

Answer:

The correct answer is A.

Step-by-step explanation:

The only way to answer this question is to check the definitions of chord and diameter.

A chord is a segment with endpoints on the circle. In the attached figure the segments CD and GH are chords.

Now, notice that according to the given definition the segment EF is also a chord, but with the special characteristic that the center of the circle, denoted by A, it is on the segment. This ‘‘special’’ chords that contains the center of the circle are called diameter.

Sometimes the diameters are also called the larger of the chords.
the answer choice will be A

What is the solution of the equation 3^x=12? Round your answer to the nearest ten-thousandth.A) 0.4421

B) 0.4771

C) 0.5149

D) 2.2619

Answers

Hey!


Okay, so if  f(x)  equals  g(x),  then In(f(x))  equals  In(g(x)).  So, we'll plug in the numbers into this 'equation' we have now.

In(3^(x) ) = In(12 )

And now we'll apply this log rule →  log_(a) (x^(b) ) = b * log_(a) (x)

In(3^(x) )=xIn(3) \n xIn(3)=In(12)

Now we have to solve In(3^(x) )=xIn(3) \n xIn(3)=In(12). To do that, we'll divide both sides of the equation by  In(3).

(xIn(3))/(In3) = (In(12))/(In(3))

Now we simplify

x = (In(12))/(In(3))

So, this means the equation  3^(x) =12  solved is  x = (In(12))/(In(3))  or  2.2619.

Hope this helps!


- Lindsey Frazier ♥

The answer is D.) 2.2619.
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