Could somebody help me I don't understand any of this. Could someone show me or tell me how to work the problems?

idk how to tag so maybe this might tag Ms. Sue here.

1. a^2 +b^2 = c^2

9^2 + 12^2 = c^2

81 + 144 = c^2

225 = c^2

sqrt(225) = sqrt (c^2)


c = 15

2. 5^2 +b^2 = 13^2

25 + b^2 = 169

25-25 + b^2 = 169-25

b^2 = 144

b= 12

3. Q
15^2 +20^2 = c^2

225 +400 =c^2

625 = c^2

c = 25

4. Sqrt (4-(-2)^2 + (-6-2)^2))
Sqrt (36 + 64)

= 10

1.

Pythagorean theorem

c = sqrt ( a ^ 2 + b ^ 2 )

c = sqrt ( 9 ^ 2 + 12 ^ 2 )

c = sqrt ( 81 + 144 )

c = sqrt ( 225 )

c = 15

Answer C

2.

Pythagorean theorem

b = sqrt ( c ^ 2 - a ^ 2 )

b = sqrt ( 13 ^ 2 - 5 ^ 2 )

b = sqrt ( 169 - 25 )

b = sqrt ( 144 )

b = 12

Answer D

3.

Pythagorean theorem

c = sqrt ( a ^ 2 + b ^ 2 )

Answer A

becouse :

c = sqrt ( 20 ^ 2 + 15 ^ 2 )

c = sqrt ( 400 + 225 )

c = sqrt ( 625 )

c = 25

4.

The Distance Formula :

d = sqrt [ ( x2 - x1 ) ^ 2 + ( y2 - y1 ) ^ 2 ]

In this case :

x1 = - 2

x2 = 4

y1 = 2

y2 = - 6

d = sqrt [ ( 4 - ( - 2 ) ) ^ 2 + (- 6 - 2 ) ^ 2 ]

d = sqrt [ ( 4 + 2 ) ^ 2 + ( - 8 ) ^ 2 ]

d = sqrt [ 6 ^ 2 + ( - 8 ) ^ 2 ]

d = sqrt ( 36 + 64 )

d = sqrt ( 100 )

d = 10

Answer C

bob, You need to study the Pythagorean theorem.

There is no "tagging" or "hashtagging" on Jiskha, thank goodness!!

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1. C

2. D
3. A
4. C
5. B
6. A
7. A
8. B
9. Workpad

Hal is correct!!!! TY

HAL TYSM

Number 9 is wrong dont trust him or you will moss out on points but the rest are right

He is just putting workpad meaning that you will have to do it yourself. You should know that already.

he was saying that because some classes have a essay question others have a abcd question

yoOOO hal is right :D

Hal is right

thx Hal