ANSWER
d. The set of all real numbers
EXPLANATION
The basic cosine function ,
is continuous everywhere.
The function is defined for all real values of x.
The domain is the set all values of x that will make the function defined.
The domain is all real numbers.
The correct choice is D.
Answer:
1.488
Step-by-step explanation:
Let x be the price of a veggie wrap and y be the price of an apple.
2x + 3y = 6.24 [EQUATION 1]
3x + 2y = 6.64 [EQUATION 2]
[You need 2 equations for this question because there are 2 unknowns, the prices of a veggie wrap and an apple.]
[You can use elimination or substitution to calculate the equations. I'll just use elimination]
ELIMINATION:
[EQUATION 1 * 3] - [EQUATION 2 * 2]:
(2x + 3y)*3 - (3x + 2y)*2 = (6.24*3) - (6.64*2)
6x + 9y - 6x - 4y = 18.72 - 13.28
5y = 5.44
y = 1.088
[since y is the price of an apple and NOT a veggie wrap, you still need to find x]
sub (substitute) y = 1.088 into [EQUATION 1]
2x + 3(1.088) = 6.24
2x = 6.24 - 3.264
x = 1.488
An apple costs 1.088 and a veggie wrap costs 1.488.
What you do to one side of an equation you must do to the other in order for it to remain balanced. It’s important to remember that equations have an equal sign and expressions do not. We balance or solve equations, but simplify or evaluate expressions.
Answer:
See below in bold.
Step-by-step explanation:
The cost of what he wants to buy = 4.25 + 0.89 + 10.99
= $16.13
a) He does have enough to buy everything.
b) He has 20 - 16.13 = $3.87 left over.
Add 799.99 and 679.99 which equals 1479.98
Then divide 1479.98 by 2 which equals 739.99
Your answer is c. 739.99