Question

Please helppppp. i don’t get it and the teacher doesn’t explain it.

Answer 1

1. 22

2. 12

3. Sorry, I'm unable to solve for 3.

4. 5

Explanation:

AB is congruent to AD so let's solve the equation:

`\: \: \: \: \: \: \: \: \: \: \: 8x - 2 = 6x + 4 \\ ( - 6x \: \: \: \: \: \: \: \: \: \: \: = - 6x)/(2x - 2 = 4) \\ ( \: \: \: \: \: \: \: \: \: \: + 2 = + 2)/( (2x)/(2) = (6)/(2) ) \\ x = 3`

☆Now we plug in for AD.

`AD \\ 6x + 4 \\ 6(3) + 4 \\ 18 + 4 \\ 22`

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m<CED is on a right angle, that angle equal 90 degrees.

`7x + 6 = 90 \\ ( \: \: \: \: \: \: - 6 = - 6)/( (7x)/(7) = (84)/(7) ) \\ x = 12`

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#4. You can do the Pythagorean theorem

`{a}^(2) + {b}^(2) = {c}^(2) \\ {4}^(2) + {3}^(2) = {c}^(2) \\ {16} + 9 = {c}^(2) \\ √(25) = {c}^(2) \\ 5 = c`

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