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Blitzx
31.01.2020 •
Mathematics
Expand: (3x + 4)(2x − 5)
12x − 10x
6x^2 −7x − 20
6x^2 − 20
5x − 1
simplify: (3x + 2y) - (x + 2y)
4x + 4y
4x
2x
2x + 4y
if 1/2x + 2/3y = 6, what is 3x + 4y?
12
18
36
24
in the polynomial 4x^3 + 5x^2 − 12, what is the coefficient of the x^2 term?
5
0
-12
4
evaluate f(x) = 4x + 3x^2 − 5 when x = -2.
-25
23
-49
-1
Solved
Show answers
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Ответ:
6x² - 7x - 20
Step-by-step explanation:
Use the so-called "FOIL" method of multiplying binomials:
First terms: 3x · 2x = 6x²
Outer terms: 3x · -5 = -15
Inner terms: 4 · 2x = 8 x
Last terms: 4 · -5 = -20
Then, after simplifying, we have 6x² - 7x - 20 (second answer choice)
Ответ:
9514 1404 393
(x, y') = (-13, 13)
Step-by-step explanation:
At the given value of x, f(x) = 2. Then 9f(x)-5 = 9(2) -5 = 13.
The point on the scaled, translated graph will be ...
(x, y') = (-13, 13)
_____
The graph shows a function f(x) with a distinct feature (vertex) at (-13, 2). It also shows where that distinct feature moves to when the function is scaled and translated.