Answer:
Form an equation:
let x be the price of a shirt
Then, the price of a sweater would be x - 5
So you would have:
4(x - 5) + 3x = 200
simplify
4x - 20 + 3x = 200
7x - 20 = 200
add 20 to both sides
7x = 220
divide both sides by 7
x = about 31.43
That means the cost of the sweater would be 31.43 - 5 = 26.43
Answer:
the first one is A 19.2 the second one is D 21.4
Ratio of chocolate to mix: 3:5
New ratio: x:7
Create a proportion to find the amount of chocolates (x).
3/5=x/7
Cross multiply
21=5x
Divide both sides by 5
4.2=x
4.2 pounds are chocolates.
I hope this helps :)
Answer:
200000
Step-by-step explanation:
I believe that 200000x7000 = 1400000000 (The answer to the China population equation), therefore should be correct. Hope this helped.