donut asked in 社會與文化語言 · 8 years ago

英文數學問題4題

express y as a function of x

1. y=3xy+5

solve each equation or inequality

2. x+3x=4x

3. x-0.04(x-10)=96.4

4. the perimeter of a rectangle is 84 meters. if the width is 16 meters less than the length, then what is the width of the rectangle?

2 Answers

Rating
  • 8 years ago
    Best Answer

    express y as a function of x

    1. y=3xy+5

    y-3xy= 5

    (1-3x)y =5

    y=5/(1-3x)

    solve each equation or inequality

    2. x+3x=4x

    4x = 4x

    3. x-0.04(x-10)=96.4

    x-0.04x+0.4=96.4

    0.96x=96

    x=100

    4. the perimeter of a rectangle is 84 meters. if the width is 16 meters less than the length, then what is the width of the rectangle?

    The width of the rectangle is 13 meters.

  • heidi
    Lv 7
    8 years ago

    1.

    y-3xy=5

    (1-3x)y=5

    y=5/(1-3x)

    2.

    4x=4x

    0x=0

    x為任意數

    3.

    x-0.04x+0.4=96.4

    0.96x=96

    x=100

    4.

    設length為x

    width為x-16

    2[x+(x-16)]=84

    x+(x-16)=42

    2x-16=42

    2x=58

    x=29

    width為29-16=13

Still have questions? Get your answers by asking now.