Which expression best represents the following statement?
The sum of 15 and twice a number `n`.
15 + 2n
#6.
Name the property that is illustrated by the statement below:
2 + 7 + 3 = 2 + 7 + 3
The property illustrated by the statement is the commutative property of addition.
Printer ink cartridges cost $19 each. The company that sells the ink cartridges charges a flat rate of $7.50, no matter how many ink cartridges you buy.
Write an algebraic expression that describes the total cost for a single order of `x`, cartridges.
The algebraic expression that describes the total cost for a single order of `x` cartridges is:
19x + 7.50
Evaluate the expression `3b-ac` when `a\ =\ -2`, `b\ =3`, and `c=0.5`
To evaluate the expression 3b - ac when a = -2, b = 3, and c = 0.5, we substitute the given values into the expression and perform the calculations:
3(3) - (-2)(0.5)
= 9 - (-1)
= 9 + 1
= 10
Therefore, the value of the expression 3b - ac when a = -2, b = 3, and c = 0.5 is 10.
Evaluate the expression `5x^{2}+2y` when `x\ =\ -3` and `y\ =0.25`.
To evaluate the expression 5x^2 + 2y when x = -3 and y = 0.25, we substitute the given values into the expression and perform the calculations:
5(-3)^2 + 2(0.25)
= 5(9) + 0.5
= 45 + 0.5
= 45.5
Therefore, the value of the expression 5x^2 + 2y when x = -3 and y = 0.25 is 45.5.