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zmey [24]
3 years ago
10

A portion of the graph of f(x) = −x2 − 10x − 21 is shown. Which of the following describes all solutions for f(x)? a partial par

abola opening down and passing through negative 7 comma 0 and negative 3 comma zero with endpoints at negative 8 comma negative 5 and negative 2 comma negative 5
A) (x, x2 − 10x − 21), where −7 ≤ x ≤ −3
B) (x, y), where −7 ≤ x ≤ −3
C) (x, x2 − 10x − 21), where −8 ≤ x ≤ −2
D) (x, y) for all real numbers
Mathematics
2 answers:
Ket [755]3 years ago
7 0

Answer:

the answer is A

Step-by-step explanation:

you pluy in each number for the portion of the function in the graphing calculator and get the answer

lana66690 [7]3 years ago
6 0

Answer: I believe the answer is A) (x, x2 − 10x − 21), where −7 ≤ x ≤ −3

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The pie chart shows information about the voters in an election 2800 more women voted than men work out the total number of vote
Cerrena [4.2K]

The angle subtended by the women voters are 100° more than the angle subtended by the men voters.

  • The total number of voters are <u>10080 voters</u>

Reasons:

The angle subtended by the men on the pie chart = 130°

The number of women = 2800 + The number of men

Therefore;

Angle subtended by the women voters on the pie chart = 360° - 130° = 230°

The difference between the angle representing women and the angle

representing men = 230° - 130° = 100°

Therefore;

100° = 2800

Which by common ratios gives;

\dfrac{100^{\circ}}{360^{\circ}} = \dfrac{2800}{Total \ number \  of \ voters }

100 × Total number of voters = 2800 × 360

The \  total \  number  \ of  \ voters = \dfrac{2800 \times 360}{100}  = 10080

The total number of voters = <u>10080</u>

Learn more here:

brainly.com/question/20431949

6 0
3 years ago
Determine which relation is a function.
Nezavi [6.7K]
Functions can only have 1 value of 'x'.

Option A is not a function because it has two -5's

Option B is not a function because it has two -2's.

Option C is a function.

Option D is not a function because it has two 6's.
5 0
3 years ago
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Sophie [7]

Answer:

4 × ( 9 + 2z)

Step-by-step explanation:

36 + 8z = 4 × (9) + 4 × (2z) ; so here 4 is a common factor

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we can also write it like this

36 + 8z = 2 × ( 18 + 4z)

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3 years ago
Trigonometry<br> Reference Angles and Triangles<br> Find the exact value of sin 135*
Tomtit [17]

Answer:

sqrt(2)/2

Step-by-step explanation:

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= 1/sqrt(2) or sqrt(2)/2

sqrt: square root

4 0
3 years ago
I do not understand this im lost
mote1985 [20]
In such type of questions, all that you are supposed to do is, use basic mathematics to eliminate any one of the given two variables. Check out the equations if in case you can multiply any of the given ones with a -1 and add the two equations,eliminating one of the variables.
7 0
3 years ago
Read 2 more answers
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