80 - 64 = 16
16 ÷ 80= 0.2
0.2= 20%
![\frac{1}{4}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B4%7D%20)
w - 3 < 3
Everything you do to one side of the inequality, you have to do to the other side. Add 3 to both sides.
![\frac{1}{4}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B4%7D%20)
w < 6
Divide both sides by
![\frac{1}{4}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B4%7D%20)
to isolate the variable, w.
w < 24
Let n = cost of 1 notebook
Let p = cost of 1 pencil
Then,
3n + 4p = 8.5
5n + 8p = 14.5
You can solve for one variable in terms of the other and then substitute into the remaining equation.
3n + 4p = 8.5
+ 5n + 8p = 14.5
Multiply the top equation by -2 so that the p-containing terms cancel each other out:
-2(3n + 4p = 8.5)
+ 5n + 8p = 14.5
-n + 0 = -2.5
So after dividing both sides by -1, we see that n = $2.5. Plugging into the first equation gives p = $0.25.
3n + 4p = 8.5
5n + 8p = 14.5
Answer:
its 13
Step-by-step explanation:
Answer:
Step-by-step explanation:
If we want to share £5 to the ratio of 1/3 we should follow this steps :
- our ratio is 1/3 so we should add 1 and 3 together to find the total number of parts : 1+3=4
- divide the total amount by the number of parts : 5/4 = 1.25
- multiply each number in the ratio by 1.25 : 1.25*1=1.25 and 1.25*3=3.75
the answer is 1.25 and 3.75
It was obvious from the beginning that the answer would be the last one since ut had two numbers
- following the same steps you get again in the second question :
6 ; 14