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Mathematics

1 answer:

antoniya [11.8K]3 years ago

5 0

Step-by-step explanation:

Triangle XYZ is isosceles.

Since Angle Y = 90°, Angle Z = (180° - 90°)/2 = 45°.

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Find the mean, median and more for the following data sets. (15, 13, 19, 17, 25, 13, 23, 18, 19, 17, 21)

777dan777 [17]

Step-by-step explanation:

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3 years ago

From the set {6, 7, 11}, use substitution to determine which value of x makes the equation true.

kotykmax [81]

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4 years ago

Read 2 more answers

Solve this sumutaneous equation<br> 2x-5 y=9<br> 3x+4y=2

Alla [95]

Answer:

Step-by-step explanation:

$\left\{\begin{array}{ccc}2x-5y=9&\text{multipy both sides by 4}\\3x+4y=2&\text{multiply both sides by 5}\end{array}\right\\\underline{+\left\{\begin{array}{ccc}8x-20y=36\\15x+20y=10\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad23x=46\qquad\text{divide both sides by 23}\\.\qquad x=2\\\\\text{put it to the second equation}\\\\3(2)+4y=2\\6+4y=2\qquad\text{subtract 6 from both sides}\\4y=-4\qquad\text{divide both sides by 4}\\y=-1$