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trasher [3.6K]
3 years ago
6

What is the value of x to the nearest tenth?

Mathematics
1 answer:
pav-90 [236]3 years ago
5 0
It would be 5.4 knowing that 9.6 is not the diameter you would need a larger radius so that when it is doubled you get a good number :)
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Show how to use substitution or elimination to solve the following system of equations. Write the solution as an ordered pair.
max2010maxim [7]

Answer:

  (4, 6)

Step-by-step explanation:

<u>Substitution</u>

Using the second equation, we can substitute for y in the first equation.

  4x -(2x-2) = 10

  2x +2 = 10 . . . . simplify

  x +1 = 5 . . . . . . .divide by 2

  x = 4 . . . . . . . . . subtract 1

  y = 2(4) -2) = 6 . . . . substitute for x in the equation for y

The solution is (x, y) = (4, 6).

__

<u>Elimination</u>

Often, we like to start with both equations in standard form when we solve by elimination. That is nice, but not completely necessary.

We can eliminate the y-variable by simply adding the two given equations.

  (4x -y) +(y) = (10) +(2x -2)

  4x = 8 + 2x . . . . . collect terms. The y-variable has been eliminated.

  2x = 8 . . . . . . . . . subtract 2x

  x = 4 . . . . . . . . . . divide by 2

Y can be found using the second equation.

  (x, y) = (4, 6)

__

We could have eliminated the x-variable by multiplying the second equation by 2, then adding the two equations.

  (4x -y) +2(y) = (10) +2(2x -2)

  y = 6 . . . . . . . . . subtract 4x from both sides. The x-variable has been eliminated.

Now, x can be found using either equation.

  6 = 2x -2 . . . substitute for y in the second equation

  3 = x - 1 . . . divide by 2

  x = 4 . . . . . add 1

  (x, y) = (4, 6)

3 0
3 years ago
Find the value of the following expression:
Ket [755]
(2^8 . 5^-5 . 19^0)^-2

using PEMDAS

this = (2^8 * 1/5^5 * 1)^-2


=  (5^5 / 2^8)^2

= 5^10 / 2^16
7 0
3 years ago
Read 2 more answers
7 + 7 + (-1) = ?<br><br>A. 16<br>B. 10<br>C. 13<br>D. 7
saul85 [17]
7 + 7 + (-1)
7 + 7 - 1
13

Hope this helps :)
5 0
3 years ago
Read 2 more answers
There were 650 fruit in a fruit stall. 62% of the fruit were sold. How many fruit were left?
tensa zangetsu [6.8K]

Answer:

62/100 multiplied by 650 which is 403 fruits left

6 0
2 years ago
Read 2 more answers
Solve the inequality.
DedPeter [7]
C>12
Y=-3 -3+13= 10
7x-14 Multiply
112
3 0
3 years ago
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