The domain of a function is the values of x the function can have. Since the function starts from x=-2 and continues in the positive x direction, we can say B) x is greater than or equal to -2 is our domain.
Answer:
25 math 18 history
Step-by-step explanation:
Equations:
x+y=43
x-7=y
x+x-7=43
2x=50
X=25
25-7=y
y= 18
Well, following the order of PEMDAS, I got choice B. 52
For instance, when you plug in 5 for x, you get F(5)=2(5)^2+2.
Moreover, following PEMDAS, you're supposed to solve what's inside the parenthesis, but since there is no operation going on inside the parenthesis, then you simple move on to the exponent.
In this case, you square the number 5, which gives you F(5)=2(25)+2
After that, you Multiply (letter M in PEMDAS). This results in F(5)=50+2.
Finally, you add them, which results in F=52.
By the way, I noticed a mistake in your work. When multiplying 2 by 5, the answer is 10, not 20.
Anyway, hope this helped! :-)
Answer:
D) 3
Step-by-step explanation:
Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS. PEMDAS is the order of operations, and stands for:
Parenthesis
Exponents (& Roots)
Multiplications
Divisions
Additions
Subtractions
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First, subtract 4 from both sides of the equation:
2x + 4 (-4) = 10 (-4)
2x = 10 - 4
2x = 6
Next, divide 2 from both sides of the equation:
(2x)/2 = (6)/2
x = 6/2
x = 3
D) 3 is your answer.
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Answer:
(-3,5)
Step-by-step explanation:
6x+7y=17
-6x+5y=7
2y=10
y=5
6x+5(5)=7
6x+25=7
6x=7-25
6x=-18
x=-3