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tigry1 [53]
3 years ago
13

NEED HELP PLZ FOR INTERIM TEST 2 x+4(x-1)=2+4x

Mathematics
1 answer:
lesya692 [45]3 years ago
4 0

2x+4(x-1)=2+4x [First, you would distribute the 4 into the x and -1]

2x+4x-4=2+4x [Then combine like terms(2x+4x)]

      6x-4=2+4x [Next, subtract common numbers (6x-4x)]

      2x-4=2       [Then you would combine like terms (2+4)]

         2x=6       [Finally, divide the 2x by 6]

           x=3

Hope this helped!

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In 2001, gold was priced at (0.5x + 300) dollars per ounce. Its price tripled in 2008 and then doubled in 2011. In 2016, its pri
zloy xaker [14]

Given:

Price of  gold in 2001 = (0.5x+300)

Its price tripled in 2008 and then doubled in 2011. In 2016, its price dropped to \dfrac{2}{3} of the price in 2011.

To find:

An expression for the price of gold per ounce in 2016.

Solution:

We have,

Price of  gold in 2001 = (0.5x+300)

Its price tripled in 2008.

Price of  gold in 2008 = 3(0.5x+300)

Then doubled in 2011.

Price of  gold in 2011 = 2\times 3(0.5x+300)

In 2016, its price dropped to \dfrac{2}{3} of the price in 2011.

Price of  gold in 2016 =\dfrac{2}{3}\times 2\times 3(0.5x+300)

                                    =2\times 2(0.5x+300)

                                    =4(0.5x+300)

                                    =4(0.5x)+4(300)

                                    =2x+1200

Therefore, the required expression for the price of gold per ounce is (2x+1200).

8 0
3 years ago
Contestants in a dance marathon rest for the same amount of Time ever hour. A couple rest for 27 minutes in 6 hours. How long do
sergejj [24]

Answer:

they rest for 36 minutes

Step-by-step explanation:

27 minutes        x

----------------- = ---------------

6 hrs                    8 hrs

using cross products

27 * 8 = 6x

divide by 6

27*8/6 = x

36 minutes = x

3 0
3 years ago
Find midpoint between a(3,-3) and b(-3,6)
meriva
Okay, so, I don’t know what I’m doing here or if this is valid, but I believe in you.
7 0
4 years ago
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Kermit's favorite iced tea is made with 15 tea bags in every 2 liters of water. Peggy made a 12-liter batch of iced tea with 90
Anestetic [448]

Answer:

  C.  It is just right.

Step-by-step explanation:

We want to compare the ratios ...

  bags : liters = 15 : 2

and

  bags : liters = 90 : 12

If we multiply the numbers of the first ratio by 6, we see they are identical to those in the second ratio:

  (15)(6) : (2)(6) = 90 : 12

The ratio of bags to liters for Peggy's tea matches the ratio Kermit likes. He will think it is just right.

6 0
4 years ago
PLEASE HELP ME WITH THIS AND EXPLAIN
Stolb23 [73]
IF 12 copies cost $0.66 you have to divide 0.66/12 and you will get the cost for 1 copy: 0.66/12= $0.055 per each copy.
If Melyssa needs 56 copies, you have to multiply 0.055*56= $3.08 
3 0
4 years ago
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