This Post Has 10 Comments

1. 21y^4= B*7y^3

   B=(21y^4)/(7y^3)

   B=3y

   i think this is correct

   Reply

2. B = 7[tex]x^{4}[/tex]

   Step-by-step explanation:

   Checking the result of B

   - 5x² × 7[tex]x^{4}[/tex] = - 35[tex]x^{2+4}[/tex] = - 35[tex]x^{6}[/tex] ← Correct

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3. [tex]D=-5y^2[/tex]

   Step-by-step explanation:

   [tex]-15y^4=D(3y^2)\\D=\frac{-15y^4}{3y^2} \\D=-\frac{15}{3}\cdot\frac{y^4}{y^2} \\D=-5y^2[/tex]

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4. 21y^4= B*7y^3

   B=(21y^4)/(7y^3)

   B=3y

   Reply

5. B=3y^(2)

   Step-by-step explanation:

   Reply

6. 1225/8

   Step-by-step explanation:

   1225= 4(2)c

   1225=8c  divide the 8 to isolate the c

   1225/8=c

   Reply

7. -6x^2 y^3 = B

   Step-by-step explanation:

   42x^5y^4=(-7x^3y)(B)​

   Solve for B

   Divide by -7

   42x^5y^4/-7=(-7x^3y)(B)/-7

   -6 x^5 y^4 = x^3 y B

   Divide by x^3

   -6 x^5 y^4/x^3 = x^3 y B​/x^3

   -6 x^5/x^3 y^4 = By

   -6 x^2 y^4

   Divide by y

   -6x^2 y^4/y = By/y

   -6x^2 y^3 = B

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8. -4x^2

   Step-by-step explanation:

   Just did it on khan academy

   Reply

9. 1.135y

   Step-by-step explanation:

   Im assuming 21y4 are being multiplied making it 21 x 4 x y

   Just divide over 74 to the left side

   Reply

10. G= 27/y; y≠0

    Step-by-step explanation:

    Switch sides

    G2y^2=18y·3

    Multiply the numbers: 18·3=54

    G2y^2=54y

    Divide both sides by 2y^2:

    G·2y^2/2y^2=54y

    or y≠0

    Simplify

    G= 27/y; y≠0

    Reply