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HELP PO PLZ NEED KO NA PO

HELP PO PLZ NEED KO NA PO class=

Sagot :

Answer:

1.) 7x + 4y   when x=6 and y=8

Answer: 74

2.) 8x + 6y   when x=9 and y=5

Answer: 102

3.) 16a - 9b   when a=2 and b=5

Answer: -13

4.) 14a - 5b    when a=5 and b=9

Answer: 25

5.) 4x + 7y + 3xy  when x=3 and y=7

Answer: 124

6.)  [tex]\frac{n}{4} +\frac{60}{n} -\frac{n}{6}[/tex]    when n=12

Answer: 6

7.)  [tex]\frac{54}{n} +\frac{n}{3}[/tex]       when n=9

Answer: 9

8.) 9xy - 4xz + 3yz   when x=8, y=5 and z=7

Answer:  241

9.) 14xz + 6y - 4yx   when x=7, y=3 and z=2

Answer: 346

10.) x + 8y + 5xy    when x=12 and y=3

Answer: 216

11.)  [tex]\frac{(y+16)}{6} +\frac{(50-y)}{3}[/tex]    when y=8

Answer: 18

12.)  [tex]\frac{(w+57)}{9} +\frac{(90+w)}{7}[/tex]   when w=6

Answer: 20.71

13.) (x + y) (x - y)   when x=8 and y=3

Answer: 55

14.) (x + 2y) (2x - y)   when x=7 and y=4

Answer: 150

15.) 81 - 2 [ 5 (n + 4)]   when n=3

Answer: 21

Step-by-step explanation:

This is how I solved the items:

Example:

7x + 4y   when x=6 and y=8

Step 1: SUBSTITUTE

So,

7 (6) + 4 (8)

Step 2: MULTIPLICATION

So,

7 x 6 = 42

4 x 8 = 32

42 + 32 = ?

Step 3: SOLVE

42 + 32 = 74

There you have the answer.

See the pic above/below for more examples...

View image MYSTICAJEM
View image MYSTICAJEM