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lisov135 [29]
3 years ago
13

What is the value of x in the equation x – y = 30, when y = 15

Mathematics
2 answers:
olga55 [171]3 years ago
8 0
  x - y = 30
x - 15 = 30
  + 15  + 15
      x = 45
Mekhanik [1.2K]3 years ago
6 0
The answer is 45 because 45-15=30, therefore x=45.
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Find x<br><br> Need gelppppppppppp
igor_vitrenko [27]

Answer:

The Value of x is 10.

Step-by-step explanation:

Consider ABCD is a Parallelogram where

∠BCA = 43°

∠CBA = 98°

∠ACD = (2x+9)

To Find:

x = ?

Solution:

Triangle sum property:

In a Triangle sum of the measures of all the angles of a triangle is 180°.

In ΔABC

\angle ABC+\angle BCA+\angle CAB=180\\\\98+43+\angle CAB=180\\\therefore m\angle CAB =180-141=39\°

Now CD || BA         .......opposite sides of Parallelogram is parallel

\angle CAB=\angle ACD.........Alternate Angles are equal

Substituting the values we get

39=2x+19\\2x=20\\\\\therefore x=\dfrac{20}{2}=10\\\\\therefore x=10

The Value of x is 10.

6 0
3 years ago
Help please, area of a triangle
morpeh [17]

Answer:

84 ft^2.

Step-by-step explanation:

Use Pythagoras to find the value of h:

25^2 = h^2 + 7^2

h^2 = (25-7)(25+7)

h^2 = 576

h = √576 = 24

Area  = 1/2 * 7 * 24

= 84.

4 0
2 years ago
Help me pleaseeeeeeee​
nadya68 [22]
10^-8 because e-8 is 10^-8
8 0
3 years ago
Which is the simplified form of the expression <br><br><br> please help!!
Art [367]

Answer:

A

Step-by-step explanation:

p^-8q^-20 * p^8q^-10

=q^-30

=1/q^30

8 0
2 years ago
<img src="https://tex.z-dn.net/?f=x%20%20%5Cdiv%203x%20-%202%20%3D%201%20%5Cdiv%203x%20-%204" id="TexFormula1" title="x \div 3x
Maurinko [17]

Hello from MrBillDoesMath!

Answer:

x = 1/2 (1 +\- i sqrt(23))

Discussion:

x \3x - 2 =   (x/3)*x - 2   =  (x^2)/3 - 2     (*)

1 \3x - 4   =  (1/3)x - 4                               (**)

(*) = (**)   =>

(x^2)/3 -2 = (1/3)x - 4        => multiply both sides by 3

x^2 - 6 = x - 12                 => subtract x from both sides

x^2 -x -6 = -12                   => add 12 to both sides

x^2-x +6  = 0

Using the quadratic formula gives:

x = 1/2 (1 +\- i sqrt(23))

Thank you,

MrB

4 0
3 years ago
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