Answer:
If you add a cold cube (add a negative number), the temperature goes down. If you remove a hot cube (subtract a positive number), the temperature goes down. And if you remove a cold cube (subtract a negative number), the temperature goes UP! That is, subtracting a negative is the same as adding a positive.
Step-by-step explanation:
thats the best way I think of at least
They should both move to their right to avoid the collision.
X>9 is how you would write X is greater than 9.
Answer:
Step-by-step explanation:
Multiply the terms of the rows of the first matrix with the terms given in the column of the second matrix.
Let cartons of pencils = P and cartons of erasers = E
Total cartons is 150, so you have P + E = 150
Total cost is $900, so you have 7P + 4E = 900
Rewrite the quantity equation as P = 150 - E
Replace P in the cost equation:
7(150 - E) + 4E = 900
Use the distributive property:
1050 - 7E + 4E = 900
Simplify:
1050 - 3E = 900
Subtract 1050 from both sides:
-3E = -150
Divide both sides by -3:
E = -150 / -3
E = 50
There were 50 cartons of Erasers.
Subtract the number of erasers from the total cartons to get the number of cartons of pencils:
150 - 50 = 100 cartons of pencils.
