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2 years ago

Help please due today No links

Mathematics

1 answer:

GarryVolchara [31]2 years ago

4 0

See the answer in the image

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What are the zeros of the function?

cluponka [151]

The function is:

f ( x ) = x² - x - 72

This is a quatdratic function. So we can find the zeroes of the function with the formula:

x 1/2 = ( - b +/- √(b² - 4 ac) ) / ( 2a )

And we have: a = 1, b = - 1 and c = - 72

x 1/2 = ( 1 +/- √((-1)² - 4 · 1· ( - 72 )) ) / 2

x 1/2 = ( 1 +/- √( 1 + 288 ) ) / 2

x 1/2 = ( 1 +/- √289 ) / 2

x 1/2 = ( 1 +/- 17 ) / 2

x 1 = ( 1 - 17 ) 2 = - 16 / 2 = - 8

x 2 = ( 1 + 17 ) / 2 = 18 / 2 = 9

Answer: The zeroes are - 8 and 9.

7 0

3 years ago

The number of classes you are taking this semester is a discrete variable

Zarrin [17]

Answer:

true

Step-by-step explanation:

4 0

3 years ago

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What is 0 to the -1,000

Tanya [424]

Answer:

Step-by-step explanation:

3 0

3 years ago

In Jacks class, 75% of the students are girls. there are 18 girls in the class. what is the total number if students in the clas

Andre45 [30]

18 = .75x
/.75 /.75 (divide both sides by .75 to isolate x)

24 = x

24 total students

Hope this helps!

6 0

3 years ago

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Chapter 8 Written Homework 1. A hypothesis test is conducted to test the claim that the proportion of people with dark hair at M

UNO [17]

Answer:

we reject H₀

Step-by-step explanation: Se annex

The test is one tail-test (greater than)

Using α = 0,05 (critical value ) from z- table we get

z(c) = 1,64

And Test hypothesis is:

H₀ Null hypothesis μ = μ₀

Hₐ Alternate hypothesis μ > μ₀

Which we need to compare with z(s) = 2,19 (from problem statement)

The annex shows z(c), z(s), rejection and acceptance regions, and as we can see z(s) > z(c) and it is in the rejection region

So base on our drawing we will reject H₀

3 0

2 years ago