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Xelga [282]
3 years ago
11

Identify the domain and range of the function f(x) = 2x2 − 6x − 9.

Mathematics
1 answer:
mash [69]3 years ago
4 0
Range is the y values or ouputs
domain is inputs or x vvalues

we can use any x value
but at a certain y value, w can't go below that
find thatminimum
find the vertex
for
ax^2+bx+c
the x value of the vertex is
-b/2a
plug that in to the equaiton to get the y value

-b/2a=-(-6)/(2*2)=6/4=3/2

plug that in
2(3/2)^2-6(3/2)-9
2(9/4)-9-9
9/2-18
4.5-18
-13.5

domain=all real numbers
range=from -13.5 to positive infinity
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If Chris has 2 times as many nickels as quarters and they have a combined value of 210 cents, how many of each coin does he have
BlackZzzverrR [31]
Im pretty sure she has 6 quarters and 12 nickels since it it twice as much.

$0.25 x 6 =150

$0.5 x 12 =60

total = 210
8 0
3 years ago
A rectangular prism has a length of 5 cm, a width of 2 1/2 cm, and a expressions height of 1 1/2 cm. Which can be used to find t
Assoli18 [71]

To find the volume of a rectangular prism, we can use the formula [ V = l * w * h ]

V = 5 * 2 1/2 * 1 1/2

V = 12 1/2 * 1 1/2

V = 18 3/4cm³

Now that we know the volume, we can check each answer choice.

Option A:

5 ∙ 2 1/2 ∙ 1 1/2

12 1/2 * 1 1/2

18 3/4cm³

Option B:

12 1/2 ∙ 1 1/2

18 3/4cm³

Option C:

1 1/2(5 + 2 1/2)

1 1/2(7 1/2)

11 1/4cm³

Option D:

1/2(12 1/2 ∙ 1 1/2)

1/2(18 3/4)

9 3/8cm³

Therefore, the only correct options are A and B.

Best of Luck!

5 0
3 years ago
Read 2 more answers
Guyssssssss help me 10 points!!
zlopas [31]

Answer:

19

Step-by-step explanation:

the side is same as 57

what times 3 is 57?

57/3 is 19

AB is 19

pls vote me as brainliest!!!<3

8 0
3 years ago
Evaluate the question below<br> .<br> 12-2
MAXImum [283]

Answer:

=>12-2

=> 10

<em><u>You're Welcome</u></em>

<em><u>Hope this helps you.</u></em>

<h2><em><u>Pls</u></em><em><u>, mark it as the brainliest. I need it.</u></em></h2>
8 0
3 years ago
I need answers please help
Airida [17]

You take 720 and divide by 4 for the 4 weeks. Then you divide by 6 for each of the day and then you reach your answer.

6 0
3 years ago
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