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Alex
3 years ago
14

URGENT !! Hi guys I really need help quickly, Can anybody please solve these and also write/type out each part of the equation t

hat shows how u got the final answer. I will also give brainliest.

Mathematics
2 answers:
suter [353]3 years ago
4 0

Answer:

1

  • f(x) = 2x² - 3x + 7
  • f(2) = 2(2²) - 3(2) + 7 = 9

2

  • f(x) = -x² + 8x
  • f(-4) = -(-4)² + 8(-4) = -48

3

  • f(x) = 9x - 13
  • f(5) = 9(5) - 13 = 32

4

  • f(x) = 3x² - 17
  • f(-3) = 3(-3)² - 17 = 10

----------------------------------

1, No

  • x + 4 can't be a factor of x³ + 2x³ - x - 2 as 4 is not a factor of 2

2, Yes

  • x + 1 is a factor of x⁴ + 2x³ + 2x² - 2x - 3, see below
  • x⁴ + 2x³ + 2x² - 2x - 3 =
  • (x⁴ + x³) + (x³ + x²) + (x² + x) - (3x + 3) =
  • x³(x + 1) + x²(x + 1) + x(x + 1) - 3(x + 1)

As we see each term has a factor of x + 1, hence confirmed

aev [14]3 years ago
3 0

Answer:

Question 1: 9

Question 2: -48

Question 3: 32

Question 4: 10

Step-by-step explanation:

Question 1 explanation: Since the function is f(2), that means you need to replace all variables as 2, which will be 2 * 2^2 - 3 * 2 + 7 = 2 * 4 - 6 + 7 = 8 +1 =9.

Question 2 explanation: Since the function is f(-4), that means you need to replace all variables as -4, which will be -1* (-4)^2 + 8 * (-4) = -1 * 16 + -32 = -16 -32=-48.

Question 3 explanation: Since the function is f(5), that means you need to replace all variables as 5, which will be 9 * 5 -13 = 45 - 13=32.

Question 4 explanation: Since the function is f(-3), that means you need to replace all variables as -3, which will be 3 * (-3)^2-17 =3*9-17=27-17=10.

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2(3x+10)=6x+20 does this equation have one solution or many ? Explain why
mylen [45]

Answer:

2(3x+10) = 6x+20

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6x = 6x

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This has an infinite amount of solutions

Step-by-step explanation:

8 0
3 years ago
Can someone help me.
Kamila [148]
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S=34+4°
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T=3x+9°
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HOPE IT HELPS UH!!☺️☺️
3 0
4 years ago
Please help!!!!!! find the area of the whole rectangle.
Olegator [25]

Answer:

Step-by-step explanation:

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but first you have to find the area of the triangle wich is going to be 127.5.

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8 0
3 years ago
What is the domain of the function y = StartRoot x + 6 EndRoot minus 7? x greater-than-or-equal-to negative 7 x greater-than-or-
VARVARA [1.3K]

Answer:

Domain= {x\geq -6}

Step-by-step explanation:

The function given is: f(x)=\sqrt{x+6} -7, and we are asked to find the Domain of it. Let's recall that the Domain of a function is the set of all x-values for which the function is defined (can be evaluated rendering a real number as result). So in order to find which x-values constitute such Domain, let's investigate for which x-values we can effectively evaluate the square root of "x+6".

Notice that the square root is not defined for radicands that are negative (less than zero). The only radicands that are allowed are those greater than or equal to zero. So that is exactly the condition we want to impose on the radicand: to be greater than or equal to zero (\geq 0). Our radicand is the expression: "x+6", so we write in math terms the necessary condition as:

x+6\geq 0

and solve for "x" in the inequality (isolating "x" on one side:

x+6\geq 0\\x\geq -6

The Domain of this function is therefore all those real "x" values that are greater than or equal to negative 6 (x\geq -6)

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3 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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