C. "David's equation is correct, because their spending will be multiplied by the number of months and then subtracted from their savings"
they are technically saying "Look we have 12,350 to use. How long (y) will the savings (12,350) last after using 240 each month (x)
so the amount they use *PER* month gets subtracted from the savings because they are using that money to pay with
Hope this helps :)
Answer:
x = 9
Step-by-step explanation:
23x + 24*8 + 25*1 + 26*6 = 580
23x + 192 + 25 + 156 = 580
23x + 373 = 580
23x = 580 - 373
23x = 207
x = 207/23
x = 9
Answer:
a)1 : 4 and 5 : 20
Step-by-step explanation:
If a ratio is a proportion that means the
quantity on the left hand side is lesser than the quantity on the right hand side; it's a part of a whole, a small fraction.
Example of proportion ratios:
4 : 7
7 : 29
90 : 200
68 : 140
Example of non-prpotion ratios:
7 : 4
80 : 19
29 : 20
Answer:
42 candles
Step-by-step explanation:
Firstly, we need to find the surface area of the pyramid used. This can be obtained by finding the area of the base, multiplied by the height of the pyramid.
The area of the base since it is rectangle is L * B and that is 5 * 2 = 10cm.sqr
The volume of the pyramid is A * h and that is 10 * 12 = 120cm.cub
To fInd the number of candles used , we simply divide the volume of wax by the volume of a candle.
That is 5040/120 = 42 candles