Question

Help me please with this

Answer 1

11) 2x+6y-3; x=5,y=4
the question is asking to evaluate for y when x=5 and evaluate for x when y=4,

2x+6y-3
2x+6y=3

2(5)+6y=3
10+6y=3
6y=3-10
y=-7/6 when x=5

2x+6(4)=3
2x+24=3
2x=3-24
x=-21/2 when y=4

12)
Input Output
N 4(n+3)
12 4(12+3) = 4(15)=60
14 4(14+3)=4(17)=68
18 4(18+3)=4(21)=84
25 4(25+3)=4(28)=112

13)8x+y-10; x=4, y=50
8x+y=10
8(4)+y=10
32+y=10
y=10-32
y=-22 when x=4

8x+50=10
8x=10-50
8x=-40
x=-40/8
×=-5/1=-5 when y=50

14) b is correct

15)c is correct

16) c is correct

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