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Paul [167]
2 years ago
15

Write a proof. Given x = 2 = 3 (x - 4) Prove x = 5

Mathematics
1 answer:
Galina-37 [17]2 years ago
6 0

Step-by-step explanation:

The equation in the question is false.

x - 2 = 3(x - 4)

x - 2 = 3x - 12

3x - x = 12 - 2

2x = 10

x = 10 \div 2

x = 5

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I need help thank you!<br> (7x + 14)<br> (15x - 4)
sergey [27]

Answer:

(7x + 14)° = 84°

(15x - 4)° = 146°

Step-by-step explanation:

62° + (7x + 14)° = (15x - 4)°

62° +7x + 14 = 15x - 4

15x - 7x = 62 + 14 + 4

8x = 80

x = 10

Therefore, exterior angle (15x - 4)° = 146°

                interior angle (7x + 14)° = 84°

8 0
2 years ago
All of the following should be included in the results section of a t test except:
Nikolay [14]

Answer:

Levene confidence intervals ( b )

Step-by-step explanation:

T- test should include all of the following in the results section except the  Levene confidence intervals.The confidence intervals may be constructed for various power values using the binomial distribution.

The dependent measure , the size and the Homogeneity of variance test are all included in the results section of a t-test

5 0
3 years ago
Simplify completely x^2+4x-45 / x^2+10x+9
S_A_V [24]

Answer: x - 5/x + 1

Step-by-step explanation:

This algebraic fraction

The task to be performed here is factorisation and simplification. Now going by the question,

x² + 4x - 45/x² + 10x + 9, the factorisation of

x² + 4x - 45 = x² + 9x - 5x - 45

= x(x + 9 ) - 5(x + 9 )

= ( x + 9 )(x - 5 ), don't forget this is the algebraic fraction's Numerator

The second part

x² + 10x + 9 = x² + x + 9x + 9

= x(x + 1) + 9( x + 1 )

= ( x + 9 )( x + 1 ), this is the algebraic denominator.

Now place the second expression which is the denominator under the first expression which is the numerator.

( x + 9 )( x - 5 )/( x + 9 )( x + 1 ).

You can see that, ( x + 9 )/( x + 9 ) divide each other , therefore therr then cancelled and left with

x - 5/x + 1

4 0
3 years ago
A bag contains 5 yellow marbles, 7 pink marbles, and 3 purple marbles. Gordon selects a marble without looking.
prisoha [69]
1st you add up all the marbles so we got 15 so the answe will be out of 15 then next we add up nhe number of yellow and purple marbles 5+3= 8 so the answe will be 8/15
8 0
2 years ago
What is the perimeter of a rectangle that has a length of 40 Ft and a width of 17 ft?
statuscvo [17]

Answer:

i think 114ft

Step-by-step explanation:

5 0
1 year ago
Read 2 more answers
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