Step-by-step explanation:
J = 2b
M = J + 7
M = 21
J = 21 - 7
J = 14
B = 7
<em>Equation:</em>
If M is J+7, so then J = 21-7. J is 2*b, so 2*b = 21-7. Then you subtract and divide.
So the punch has 2 liters of ginger ale. 2 liters of ginger ale is 20 percent of the punch. The punch has 8 liters of cranberry juice, 2 liters of ginger ale.
P=2g + 80
P is punch, g is ginger ale
b) 8 liters
Translating that problem into an equation with x as a variable we get 3x + x +10 = 22. Combine like terms to get 4x + 10 = 22. Subtract 10 on both sides to get 4x = 12. Divide by 4 on both sides to get x = 3.
Now to plug in. The first number was represented by 3x. So substituting 3 for the x we get 3(3) = 9. And again for the second number represented by x+10, 3+10 = 13.
Your numbers are 9 and 13. To check just add them together. 13 + 9 is 22, I'll save ya the effort.
V = πR²h = π*R²*3
27π = 3πR²
R² = 9
R = 3
Diameter = 3*2 = 6cm
Answer:
![\large\boxed{\dfrac{8}{35}}](https://tex.z-dn.net/?f=%5Clarge%5Cboxed%7B%5Cdfrac%7B8%7D%7B35%7D%7D)
Step-by-step explanation:
![\text{Put}\ c=\dfrac{4}{7}\ \text{to the expression}\ \dfrac{2}{5}\times c:\\\\\dfrac{2}{5}\times\dfrac{4}{7}=\dfrac{2\times4}{5\times7}=\dfrac{8}{35}](https://tex.z-dn.net/?f=%5Ctext%7BPut%7D%5C%20c%3D%5Cdfrac%7B4%7D%7B7%7D%5C%20%5Ctext%7Bto%20the%20expression%7D%5C%20%5Cdfrac%7B2%7D%7B5%7D%5Ctimes%20c%3A%5C%5C%5C%5C%5Cdfrac%7B2%7D%7B5%7D%5Ctimes%5Cdfrac%7B4%7D%7B7%7D%3D%5Cdfrac%7B2%5Ctimes4%7D%7B5%5Ctimes7%7D%3D%5Cdfrac%7B8%7D%7B35%7D)