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kodGreya [7K]
3 years ago
5

4.5x-7=20 i need help whats the answer

Mathematics
2 answers:
Dmitry [639]3 years ago
7 0
Your answer will be 6. 
Trava [24]3 years ago
4 0
Is this your equation?: 4.5x - 7 = 20
_____________________________________________________________

Your goal is to isolate x. By isolating the x-variable, you effectively receive the answer. In order to isolate x, you move the -7 term [Note: that the sign in front of a number signifies if it's positive or negative] as well as 4.5 behind the equality symbol. To do this, you do reverse operations to both sides. Start with -7.

The opposite of negative 7 is positive 7, therefore -7 + 7 = 20 + 7
-7 + 7 cancels each other out and 27 takes the place of 20. We now have: 4.5x = 27

Since you have to multiply 4.5 by x originally, you have to divide now. Divide 4.5 by itself and 27 by 4.5. This gives you 1 and 6. [Note that a 1 in front of a variable is like saying only that variable]

(1)x = 6, Therefore x is equivalent to 6.

Briefly check your work by taking the original equation and substituting x with 6. If 4.5(6) - 7 equals 20, 6 is our right answer. [Note: Solve with PEMDAS]

4.5 * 6 = 27

27 - 7 = 20.

In summary, x = 6 is correct. 
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3. start fraction x over 5 end fraction + 6 = 10 (1 point) 44 30 20 –20 4. 3(4 – 2x) = –2x (1 point) –1 1 2 3
max2010maxim [7]

Answer:

3.x=20


Step-by-step explanation:


5 0
3 years ago
In 2008, the total trade between the United States and Japan was $2.04 x 101^1. The total trade between the U.S. And Australia w
jolli1 [7]

Answer:

6.21 times more

Step-by-step explanation:

Assuming 2.04 x 10^11 was only a typo

you would need to first equal the powers of 10

so 20.4 x 10^10 and 3.28 x 10^10

now that they have the same powers

\frac{20.4 * 10^{10}}{3.28 * 10^{10}}  = \frac{20.4}{3.28} = 6.219512...

if it's asking for how many times i would approximate it to 6.21 times more

3 0
3 years ago
A Basketball team with 16 members needs $6216 to purchase new jerseys each member is responsible for contributing an aqual share
Irina-Kira [14]
16 rounded to the tens place = 20
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8 0
3 years ago
Point G is the midpoint of PQ. <br> PG equals 2X plus 3 and GQ equals 5X -5. what is X?
borishaifa [10]

Answer:

x=\frac{8}{3}=2\frac{2}{3}\approx{2.667}

Step-by-step explanation:

\overline{PG}=2x+3\\\overline{GQ}=5x-5

Since they're equidistant (equal distances), we can set them equal to one another and solve for x:

2x+3=5x-5

Adding 5 to both sides:

2x+8=5x

Subtracting 2x from both sides:

8=3x

Dividing both sides by 3:

\frac{8}{3}=x

Therefore:

x=\frac{8}{3}=2\frac{2}{3}\approx{2.667}

6 0
3 years ago
Use base ten blocks to solve 53/4
Crazy boy [7]
if you have base ten blocks you can figure out the answer
6 0
3 years ago
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