Answer: Maggie used 1 1/2 hours
Elizabeth used: 3 × 1 1/2 = 4 1/2 hours
Step-by-step explanation:
Let the time used by Maggie be x
Since it It takes Elizabeth three times as long as Maggie to clean her room. Elizabeth will use: = 3 × x = 3x
Therefore, x + 3x = 6
4x = 6
x = 6/4 = 1.5 hours
Maggie used 1 1/2 hours
Elizabeth used: 3 × 1 1/2 = 4 1/2 hours
Answer:
c. 5x - 3 = 125
Step-by-step explanation:
Mrs. Jones deducts $3 from each of her 5 children's allowances this week because they didn't finish their chores. They then received a total of $125 in allowance. a. 5(x - 3) = 125
b. 5x - 15 = 125
c. 5x - 3 = 125
d. 5x = 140
Solution:
Let x represent the allowance for each of Mrs. Jones children. Since she deducts $3 from each children because they didn't finish their chores, the allowance for each child becomes x - 3.
There are 5 children, hence the allowance for the 5 children would be:
5(x-3)
Since they received a total of $125 in allowance, hence:
5(x-3) = 125
5x - 15 = 125
5x = 125 + 15
5x = 140
Option c is wrong
Answer:
C
Step-by-step explanation:
Note that 1 =
, hence
9 = 9 ×
=
= ![\frac{45}{5}](https://tex.z-dn.net/?f=%5Cfrac%7B45%7D%7B5%7D)
There are 45
's in 9
Answer: 107, 108, 109 & 110
Explaination: Divide 434 by 4.
I hope this has helped! Brainliest if you will :)
Given:
It is given that surface area must be less than 150 cm².
Solution:
The Maximum Volume With Total Surface Area Less than 150 cm² is shown in the table.
From the table, it can be concluded that for r=3.00 cm and h=4.95 cm the surface area will be less than 150 cm² and the volume will be the maximum.
![S=2\pi rh+2\pi r^2\\S=2\pi (3)(7.95)+2\pi3^2\\S=93.3+56.5\\S=149.8 \text{ cm}^2](https://tex.z-dn.net/?f=S%3D2%5Cpi%20rh%2B2%5Cpi%20r%5E2%5C%5CS%3D2%5Cpi%20%283%29%287.95%29%2B2%5Cpi3%5E2%5C%5CS%3D93.3%2B56.5%5C%5CS%3D149.8%20%5Ctext%7B%20cm%7D%5E2)
Calculate the volume.
![V=\pi r^2h\\V=\pi(3)^2(4.95)\\V=139.96](https://tex.z-dn.net/?f=V%3D%5Cpi%20r%5E2h%5C%5CV%3D%5Cpi%283%29%5E2%284.95%29%5C%5CV%3D139.96)
Hence, the required dimensions are r=3.00 cm and h=4.95 cm.