-4 plus the square root of 81

Mathematics

2 answers:

almond37 [142]2 years ago

6 0

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➷ The square root of 81 is 9

We have -4 + 9

Thus, your answer is 5

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Andrew [12]2 years ago

6 0

Answer:

Step-by-step explanation:

the sqaure root of 81 is 9 so 9+-4=5

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5 months ago

What is the solution to the system of equations below?<br>2x+3y = 17<br>3x+6y= 30

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Answer:

Step-by-step explanation:

$\left\{\begin{array}{ccc}2x+3y=17&\text{multiply both sides by (-2)}\\3x+6y=30\end{array}\right\\\underline{+\left\{\begin{array}{ccc}-4x-6y=-34\\3x+6y=30\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad-x=-4\qquad\text{change the signs}\\.\qquad x=4\\\\\text{put the value of x to the first equation:}\\\\2(4)+3y=17\\8+3y=17\qquad\text{subtract 8 from both sides}\\3y=9\qquad\text{divide both sides by 3}\\y=3$