Answer:
$4
Step-by-step explanation:
To answer, we have to find the base unit of how much each package would cost out of a box. To do this, we divide the total amount of the box of paper by how many packages were inside:
40 / 8 = 5
So, each package costed Ms. Jones $5, while the single packages cost $5.50, so Ms. Jones saved $0.50 per package she bought, which if you multiply by 8, you get 4, so Ms. Jones saved a total of $4.
Hope this helps :)
Answer:
x=5
Step-by-step explanation:
Answer:
Approximately 104 joggers are female
Step-by-step explanation:
The U.S census bureau reported that 9 out of every 20 joggers at female.
Let x be the number of females out of 230 joggers.
Rewrite it as

Now we can write a proportion:

Cross multiply:
![20x=9\cdot 230\\ \\2x=9\cdot 23\ [\text{Divided by 10}]\\ \\x=\dfrac{9\cdot 23}{2}=\dfrac{207}{2}=103.5\approx 104](https://tex.z-dn.net/?f=20x%3D9%5Ccdot%20230%5C%5C%20%5C%5C2x%3D9%5Ccdot%2023%5C%20%5B%5Ctext%7BDivided%20by%2010%7D%5D%5C%5C%20%5C%5Cx%3D%5Cdfrac%7B9%5Ccdot%2023%7D%7B2%7D%3D%5Cdfrac%7B207%7D%7B2%7D%3D103.5%5Capprox%20104)
please edit your question man
Answer:
see explanation
Step-by-step explanation:
Given that M is directly proportional to r³ then the equation relating them is
M = kr³ ← k is the constant of proportion
To find k use the condition when r = 4, M = 160, thus
160 = k × 4³ = 64k ( divide both sides by 64 )
2.5 = k
M = 2.5r³ ← equation of variation
(a)
When r = 2, then
M = 2.5 × 2³ = 2.5 × 8 = 20
(b)
When M = 540, then
540 = 2.5r³ ( divide both sides by 2.5 )_
216 = r³ ( take the cube root of both sides )
r =
= 6