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XXAngelaMaexXgo
Answered

Find the value of the expression given the value of the variables.

Find The Value Of The Expression Given The Value Of The Variables class=

Sagot :

NCTworldgo

Answer:

1. 3x + 5

x = 2

3(2) + 5

6 + 5

= 11

2. 5xy + x - 4

x = -3 , y = 5

5(-3)(5) + (-3) + 4

5(-15) - 3 + 4

-75 - 3 + 4

-78 + 4

= -74

3. 6ab - c / abc

a = 5 , b = 3 , c = 10

6(5)(3) - 10 / (5)(3)(10)

6(15) - 10 / (15)(10)

90 - 10 / 150

80/150 ÷ 5/5

= 16/3

4. 3(xy + 6)

a = -6 , y = 1

3((-6)(1) + 6)

3(-6 + 6)

3(0)

= 0

5. 2x + 5 / 3x - y

x = -3 , y = -8

2(-3) + 5 / 3(-3) - (-8)

-6 + 5 / -9 + 8

-1/-1

= 1

MyUnicornGirlgo

1. 11

2. -82

3. 8/15

4. 36

5. 1

Solutions

1.

3x + 5; x = 2

3 x 2 + 5 = 6 + 5 = 11

2.

5xy + x - 4, x = -3 and y = 5

5 x (-3) x5 - 3 - 4 = -75 - 3 - 4 = -82

3.

6ab - c/abc; a = 5; b = 3; c = 10

6x5x3-10/5x3x10 = 80/150 = 8/15

4.

3 (xy + 6); x = -6 and y - 1

3 [(-6) (-1) + 6]

= 3 (6 + 6)

= 3 (12)

= 36

5.

2x + 5/3x - y x = -3 and y = -8

2x (-3) + 5/3x (-3) + 8 = -6 + 5/-9 + 8 = -1/-1 = 1

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