Solve for X y and z brainliest

Step-by-step explanation:

"y" is geometric mean

y² = 13 × 2

y = √26 ≈ 5.1

x² = 26 + 4 = 30

x = √30 ≈ 5.5

z² = 15² - 30 = 195

z = √195 ≈ 14.0

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step-by-step explanation:

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116