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3 years ago

Solve the system of linear equations x + y = 4 and 2x + 3y = 0

1 answer:

8 0

solve this answer by using substitution. set the first equation to x=-y+4 then substitute -y+4 for x in the second equation.

2(-y+4) + 3y=0

-2y+8 + 3y=0

y+8=0

y=-8

now use -8 and solve for x

x+(-8)=4

x=12

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lina2011 [118]

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2 years ago

Find the length of side x in simplest radical form with a rational denominator.

madreJ [45]

Answer:

x=2√5

Step-by-step explanation:

1st method:

sin(30)=opposite/hypotenuse=√5/x

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x=√5/sin(30)

x=2√5

2nd method:

cos(60)=adjacent/hypotenuse=√5/x

cos(60)x=√5

x=√5/cos(60)

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3rd method:

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2 years ago

Help please asp what does this equal: 1/5.1/5.1/5

motikmotik

Answer:

0.00768935024

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2 years ago

There are four cars entered into a pinewood derby race. in how many different orders can they cross the finish line, assuming th

artcher [175]

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2 years ago

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