The equation for density is:

To help you remember - my teacher told us to remember "We <span>♡ density," and the heart stands for </span>

, or

. Cheesy, but it works!<span>
</span>
Back to the problem:We know the mass if 49g and the volume is 7

, so plug these values into the equation for density:
Answer: The density is 7 g/
Answer:
Step-by-step explanation:
Let s represent the son's age now. Then s+32 is the father's age. In 4 years, we have ...
5(s+4) = (s+32)+4
5s +20 = s +36 . . . . . eliminate parentheses
4s = 16 . . . . . . . . . . . . subtract s+20
s = 4
The son is now 4 years old; the father, 36.
_____
<em>Alternate solution</em>
In 4 years, the ratio of ages is ...
father : son = 5 : 1
The difference of their ages at that time is 5-1 = 4 "ratio units". Since the difference in ages is 32 years, each ratio unit must stand for 32/4 = 8 years. That is, the future age ratio is ...
father : son = 40 : 8
So, now (4 years earlier), the ages must be ...
father: 36; son: 4.
Answer:
multiply
Step-by-step explanation:
7x 15= 105
105x4=420
then add 105+420= 44,100