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viktelen [127]
3 years ago
9

PLease help if its right you get brainliest. No cap. Also please make sure you get it right. Lol

Mathematics
2 answers:
ahrayia [7]3 years ago
6 0

Answer:

63

Step-by-step explanation:

1 : 21

2 : 42

3 : 63

Hopefully this helps!

Mrrafil [7]3 years ago
5 0

Hello Jason!

<u>ANSWER:</u>

<u></u>

B.

Hopefully, this helps you!!

:D

AnimeVines

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What are the zeros of f(x)=x^2+3x-10
vekshin1

You must remember that a polynomial is written like so...

ax^2 + bx + c

In this case...

a = 1

b = 3

c = -10

To factor you must find two numbers who both add up to b (3) AND multiply to c (-10)

-2 + 5 = 3

-2 * 5 = -10

so...

(x - 2)(x + 5)

To find the zero you must set each factor equal to zero and solve for for x like so...

x - 2 = 0

x = 2

x + 5 = 0

x = -5

Hope this helped!

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3 years ago
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Edwin conducted a survey to find the percentage of people in an area who smoked regularly. He defined the label "smoking regular
alexandr1967 [171]

Answer:

The confidence interval for this proportion = (0.09, 0.13)

Step-by-step explanation:

Confidence Interval for Proportion =

p ± z ×√p(1 - p/n)

p = proportion = x /n

x = 71

n = 635

p = 71/635

p = 0.1118110236

p ≈ 0.1118

z score for 90% confidence interval = 1.645

Confidence Interval =

0.1118 ± 1.645 × √0.1118 (1 - 0.1118)/635

0.1118 ± 1.645 × √0.09930076/635

0.1118 ± 1.645 × √0.0001563791

0.1118 ± 1.645 × 0.0125051629

0.1118 ± 0.020570993

Confidence Interval =

0.1118 - 0.020570993

= 0.091229007

Approximately to the nearest hundredth ≈ 0.09

0.1118 + 0.020570993

= 0.132370993

Approximately to the nearest hundredth = 0.13

Therefore, the confidence interval for this proportion = (0.09, 0.13)

8 0
3 years ago
HELP! STUCK IN PROBLEM!
masha68 [24]

Answer:

See explanation!

Step-by-step explanation:

<u>We are given a graph that shows the</u><u> value (in dollars) </u><u>of a car stereo at </u><u>time t (in years)</u><u> the time t=0 represents when the stereo was purchased.</u>

<u>A. What does the y-intercept mean in terms of the problem? Include the time and the value of the stereo in your answer.</u>

The graph given shows an exponential expression with a y-interept at

V_{(t=0)} = 300 dollars.<em> </em>

<em>This denotes that the initial value of a car stereo at year 0 (i.e. when it first entered the market) was at 300 dollars. </em>

<em />

<u>B. What does V(5)=98 mean in terms of the problem?</u>

Looking at the graph for V(5)=98, we know that we are looking at a point (x,y) equal to (5,98).

This denotes that at year t=5, the car stereo value was 98 dollars. Thus since the stereo entered the market the value of the car stereo has decreased by over ≈ 202 dollars.

<u>C. Is the graph increasing or decreasing? What does this mean in terms of the problem? </u>

The graph is Exponentially Decreasing suggesting that as the year t increase, the value of the car stereo is quickly decreasing by larger amounts and not in a linear manner (i.e. the value does not decrease by the same amount every year).

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3 years ago
How many solutions does the given system of equations have?
svetoff [14.1K]

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3 years ago
Please help I need to solve this problem and I just need the answer little bit of explanation too
bija089 [108]

Answer:

-1288

Step-by-step explanation:

replace x with -7 because (x= -7) and the rest is a simple maths

3 0
3 years ago
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