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DanielleElmas [232]
3 years ago
14

How do you solve 13y^2-5yx-8x^2

Mathematics
2 answers:
igor_vitrenko [27]3 years ago
8 0
<span>Step  1  :</span><span>Simplify 13y2-5yx - 23x2</span><span> 
1.1 </span>   Factoring   <span> 13y2 - 5yx - 8x2</span> Try to factor this multi-variable trinomial using trial and error<span>  </span>Found a factorization  :  (y - x)•(13y + 8x)
Final result :<span> (y - x) • (13y + 8x)</span>
Alex_Xolod [135]3 years ago
8 0

Answer:

(13y+8)(y-x)

Step-by-step explanation:

13 y^{2}- 5yx -8x^{2}

we can solve above equation by using splitting the middle term

we can factorize it by splitting the middle term

13 y^{2}- 5yx -8x^{2}

=13 y^{2}- 13yx+8yx -8x^{2}

=13y(y-x)+8x(y-x)

=(13y+8)(y-x)

There are the two factors because the degree of the polynomial is 2

Hence, the correct answer is (13y+8)(y-x)

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The correlation between two scores X and Y equals 0.75. If both scores were converted to Z-scores, then the correlation between
Ilia_Sergeevich [38]

Answer:

  (e)  0.75

Step-by-step explanation:

The correlation coefficient is not affected by translation or scaling of scores. Converting them from "raw scores" to z-scores does not affect their correlation.

The correlation coefficient of the z-scores is 0.75.

6 0
2 years ago
Please help- A bakery sells cakes for $18 each and pies for $15 each. Last weekend the bakery sold 118 total items and earned $1
Sati [7]

Answer:

64 pies sold

Step-by-step explanation:

x = number of cakes sold

y = number of pies sold

Last weekend the bakery sold 118 total items

x + y = 118

Last weekend the bakery earned $1,932.

18x + 15y = 1,932.

Get rid of one of the terms, in this case x.

x + y = 118 becomes

18x + 18y = 2124

Subtract the equations from each other

(18x - 18x) + (18y - 15y) = 2124 - 1932

3y = 192

y = 64

Subsititue y into the orginal qeuation to solve for x and check it's right.

x + 64 = 118

x = 118 - 64 = 54

18(54) + 15(64) = 1932

4 0
3 years ago
Read 2 more answers
The circumference of a circle is 40 m. Find its area?
earnstyle [38]

If the circumference of a circle is 40 m, its area is 127.32395447352 m².

5 0
3 years ago
Drag each tile to the correct box. Arrange the equations in order from least to greatest bed on their solution. Equation A: 5( x
olya-2409 [2.1K]

Answer:

B

C

A

Step-by-step explanation:

Find the value of x in each equation then compare the solutions from the least to the greatest

<u>In A</u>

5( x-6)+3x=3/4(2x-8) ------------Open brackets

5x-30+3x=3/2x-6

5x+3x-30=3/2x-6

8x-3/2x=-6+30---------------collect like terms

16x-3x=48

13x=48-----------------dived both sides by 13

x=48/13 = 3.7

<u>In B</u>

2.7(5.1x+4.9)=3.2+28.9-------------open bracket

13.77x+13.23=32.1

13.77x=32.1-13.23---------------collect like terms

13.77x=18.87

x=18.87/13.77----------------------divide both sides by 13.77

x=1.37

<u>In C</u>

5(11x-18)=3(2x+7)--------------------open brackets

55x-90=6x+21

55x-6x=21+90-----------------------collect like terms

49x=111----------------------------------divide both sides by 49 to get x

x=111/49 = 2.27

From the solutions, the least value of x is in B, then C ,and finally A

6 0
4 years ago
What’s the value of x and what’s the angle?
Alinara [238K]

Answer:

X=9 Angle= 55

Step-by-step explanation:

The sum of all the angles of a triangle is always 180

so we add the angles

50 + 75 + (5x + 10)=180

125 +5x+ 10=180

135 +5x = 180

5x= 45

x=9

to find the angle we substitute x for 9

5(9)+10=55

6 0
3 years ago
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