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amid [387]
3 years ago
15

5k-2(3k + 4) = 5x + 4 help?

Mathematics
2 answers:
vazorg [7]3 years ago
4 0
Use distributive property
5k - 6k -8 = 5x + 4
Combine like terms
-k - 8 = 5x + 4
add 8 to both sides
-k = 5x + 12
k = -5x- 12
liberstina [14]3 years ago
3 0
K=-5x-12x This is a answer
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An elevator can hold a maximum of 1500 pounds. An average child weighs 75 pounds and the average adult weighs 150 pounds. The el
CaHeK987 [17]

<u>Let's take this problem step-by-step</u>:

<u>Let's first set up some variables</u>:

  • c: # of children
  • a: # of adults

<u>Let's examine the information given:</u>

  • Elevator can hold a maximum of 1500 pounds

          ⇒ average child is 75 pounds

          ⇒ average adult is 150 pounds

                 ⇒<em> therefore</em>: 75c + 150a\leq 1500

  • Elevator can fit no more than 14 people

          ⇒ <em>therefore</em>: c + a \leq 14

<u>Let's graph the equations</u>:

 75c+150a\leq 1500\\c+a\leq 14

    ⇒ look at the image attached

<u>The point at which the two graphs intersect:</u>

  ⇒ <em>is the solution that represents the amount of children and adults and </em>

<em>       their combine weight</em>

<em />

<u><em>With the horizontal axis being the # of children and vertical axis being the # of adults</em></u><em>:</em>

<em>  ⇒ the </em><em>solution is 8 children and 6 adults</em>

<em></em>

<u>Answer: 8 children and 6 adults</u>

<u></u>

Hope that helped!

<em />

               

7 0
2 years ago
5) The perimeter of the given square is 56cm. Construct an equation and hnd
Shtirlitz [24]

Answer:

side = 14 cm

Step-by-step explanation:

Let 'x' be the side of the square.

Perimeter = 4 * side

                = 4*x

                = 4x

4x = 56

Solution:

4x = 56

Divide both sides by 4

x = 56/4

x = 14 cm

3 0
3 years ago
Which number is equal to10^-3
8090 [49]

Answer:

-1000

Step-by-step explanation:

take -10 x -10 x -10= -1000:)

4 0
4 years ago
Read 2 more answers
For the data in the table does y vary directly with? If it does, write an equation for the direct variation
horrorfan [7]

Answer:f

Step-by-step explanation:

7 0
3 years ago
PLEASE HELP ASAP!!!!! THANK YOU~
VashaNatasha [74]

Answer:

y=4x^2-8x-4

Step-by-step explanation:

<u>Quadratic Function</u>

The quadratic function can be expressed in the following form:

y=a(x-x_1)(x-x_2)

Where a is a real number different from 0, and x1, x2 are the roots or zeroes of the function.

From the conditions stated in the problem, we know

x_1=1+\sqrt{2}, \ x_1=1-\sqrt{2}

Substitute in the general formula above:

y=a[x-(1+\sqrt{2})][x-(1-\sqrt{2})]

Operate the indicated product

y=a(x^2-2x-1)

To find the value of a, we use the y-intercept which is the value of y when x=0, thus

y=a(0^2-2(0)-1)=-4

It follows that

a=4

Thus, the required quadratic function is

y=4(x^2-2x-1)

Or, equivalently

\boxed{y=4x^2-8x-4}

5 0
4 years ago
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