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katovenus [111]
3 years ago
7

Solve each system using SUBSTITUTION. Remember to check!

Mathematics
1 answer:
Annette [7]3 years ago
7 0

Answer:

\left \{ {{x=3} \atop {y=-7}} \right.

Step-by-step explanation:

We can directly substitute y of the first equation to the second equation.

-2x - 1 = 3x - 16

5x = 15

x = 3

Substituting back to any of the two equations, we get y = -2(3)-1 = -7.  If you check with the second equation, y = 3(3)-16 = -7 as well.

Therefore \left \{ {{x=3} \atop {y=-7}} \right..

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Answer:

The dimensions are:

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Step-by-step explanation:

The area of the rectangle is given as

A=42x^2+51x+15

The factored form of this quadratic trinomial gives the dimensions of the rectangle.

We factor 3 first to obtain;

A=3(14x^2+17x+5)

We split the middle term to get;

A=3(14x^2+10x+7x+5)

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A=3(2x(7x+5)+1(7x+5))

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Then the perimeter will be

2(6x+3+7x+5)=26x+16\:\:\:\boxed{\sqrt{} }

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ankoles [38]

The missing figure is attached down

∠a and ∠e are  corresponding angles ⇒ B

Step-by-step explanation:

In the attached figure

  • AB is parallel to CD
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∴ ∠a = ∠e ⇒ Corresponding angles

∴ ∠b = ∠f ⇒ Corresponding angles

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Learn more:

You can learn more about the parallel lines in

#LearnwithBrainaly

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