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3 years ago

I need help with some homework

Mathematics

1 answer:

Blababa [14]3 years ago

5 0

Answer:

XW is 288 meters

Step-by-step explanation:

straight line going across which is conveniently near the X

instantly safe to assume 180, so you then add VW because the sum of VW added to XU is virtually the same as XW

(this explanation feels bad but hopefully you get it slightly better)

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miss Akunina [59]

Answer:

I can help with Q "4" as -

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Step-by-step explanation:

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3 years ago

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Maurinko [17]

Answer:

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Step-by-step explanation:

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The sum of four times a number and five times another number is -28. The sum of nine times the first number and two times the se

Rina8888 [55]

Answer:

Step-by-step explanation:

$x,\ y-the\ numbers\\\\\text{The sum of four times a number and five times another number is -28:}\\\\4x+5y=-28\\\\\text{The sum of nine times the first number and two times the second number is 11:}\\\\9x+2y=11\\\\\text{We have the system of equations:}\\\\\left\{\begin{array}{ccc}4x+5y=-28&\text{multiply both sides by2}\\9x+2y=11&\text{multiply both sides by (-5)}\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}8x+10y=-56\\-45x-10y=-55\end{array}\right}\qquad\text{add both sides of the equation}$

$.\qquad-37x=-111\qquad\text{divide both sides by (-37)}\\.\qquad\qquad\boxed{x=3}\\\\\text{Put the value of x to the first equation:}\\\\4(3)+5y=-28\\12+5y=-28\qquad\text{subtrac 12 from both sides}\\5y=-40\qquad\text{divide both sides by 5}\\\boxed{y=-8}$

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3 years ago