BC is congruent to DC in saying this you can plug the equations to each other and solve for y and then put its back into the equation for BC to get the length.

3y+5=5y-1

subtract 3y from both sides --> 5=2y-1

add 1 to both sides --> 6=2y

now get y alone, divide by 2 by both side --> y=3

plug y in back to 5y-1 --> 5x3-1

15-1

BC = 14

7 0

3 years ago

Find the value of x A.)20 B.)55 C.)70 D.)38

Alex Ar [27]

Answer:

A.) 20

Step-by-step explanation:

These angles are complementary meaning they add up to 90°.

4x - 10 + x = 90

5x - 10 = 90

5x = 100

x = 20

4 0

2 years ago

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Explain how you can find any power of 1

My name is Ann [436]

$\bf \begin{array}{llll}
1^2\implies 1\cdot 1\implies &1\\\\
1^3\implies 1\cdot 1\cdot 1\implies &1\\\\
1^{100}\implies \stackrel{\textit{100 times}}{1\cdot 1...}\implies &1\\\\
1^{1000000}\implies \stackrel{\textit{a million times}}{1\cdot 1....}\implies &1\\\\
1^{x}\qquad \{x|~~x\in \mathbb{Z}\}\implies &1
\end{array}$

6 0

3 years ago

What is the slope of the line containing (-3,5) and (6,-1)?

Ray Of Light [21]

-1-5
6-(-3)
-6/9=-2/3
-2/3 is the slope

8 0

2 years ago

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