3 years ago

Given h(x)=2x^3+x^2+7, what is the value of h(-3)?

Mathematics

1 answer:

Vika [28.1K]3 years ago

6 0

The answer to h(-3) would be -38

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NEED HELP ASAP, WILL GIVE BRAINLIEST TO CORRECT ANSWER

Helen [10]

A) One.
If plugging to the standard formula, you will only have one answer. Thus one rational root

3 0

3 years ago

22 customers are eating dinner at an Italian restaurant. Of the 22 customers, 18 order pizza, 10 order a salad, and 8 order pizz

Ne4ueva [31]

Answer:

Step-by-step explanation:

P(A) = 18/22

P(B) = 10/22

P(A and B) = 8/22

P(A or B) = 18/22 * 10/22 = 0.37

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3 years ago

2. A random sample of 30 households was selected as part of a study on electricity usage, and the number of kilowatt-hours (kWh)

Brrunno [24]

Answer:

Step-by-step explanation:

Given that n =30, x bar = 375 and sigma = 81

Normal distribution is assumed and population std dev is known

Hence z critical values can be used.

For 95% Z critical=1.96

Margin of error = $1.96(\frac{81}{\sqrt{30} } )=29$

Confidence interval = 375±29

=(346,404)

B) 99% confidence

Margin of error = 2.59*Std error =38

Confidence interval = 375±38

=(337, 413)

C) For 90%

Margin of error = 20

Std error = 20/1.645 = 12.158

Sample size

$n=(\frac{81}{12.158} )^2\\=44.38$

Atleast 44 people should be sample size.

8 0

3 years ago

Four less than one-third of the product of mine fourths and eight<br><br> What is the expression?

NARA [144]

Answer:

not too sure tbh

Step-by-step explanation:

(1/3*9/4*8)-4

5 0

3 years ago

How do I solve -12+1/2x=-6

dedylja [7]

Answer:

x = 12

Step-by-step explanation:

First, eliminate the fractional coefficient 1/2, by multiplying all three terms by 2:

-24 + x = -12

Adding 24 to both sides isolates x: x = -12 + 24, or x = 12

6 0

2 years ago