Hope this helps final answer it the one with check mark . That’s what I know on how to do this
Answer:
4. x= -6
5. x= 7
6. x= -18
7. x= 8
8. x= 7
I'll do 9 and 10 in a separate answer
Step-by-step explanation:
4. Multiplying a negative with another negative always equals a positive, so replace x with -6, multiply -6 and -3 and you'll get 18.
5. To make it simple, think "what minus 3 equals 11?" So in this case, multiplying 2 by 7 would = 14, and that minus 3 is 11.
6. Divide a negative by a positive to get a negative answer. -9 + 6 = -3, but first we have to get 9. So since the fraction is x divided by 2, you'd replace x with -18 to get -9.
7. -3 x 8 is -24, + 11 is -13.
8. What minus 7 equals 21? 28. So replace x with 7. (7 x 4 = 28), subtract 7 from 28, and then you'll have 21.
So n=number of nickles
d=number of dimes
n is 12 more than d so
n=12+d
but they have same amount of money so
n times 5=worth of nickles
d times 10=worth of dimes
5n=10d
divide both sides by 5
n=2d
subsitute
n=2d
n=12+d
2d=n=12+d
2d=12+d
subtract d from both sides
d=12
subsitute
n=12+d
n=12+12
n=24
24 nickles
12 dimes
14.7 mm is the height.
Use the volume equation for a cylinder which is
volume=(PI/4)*(diameter^2)*(height)
And you have volume, and diameter (which is just radius times 2) so solve for height.
5588=(PI/4)*(22^2)*Height
Height = 14.7 mm
