1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Lina20 [59]
3 years ago
13

Please help with this question!!!

Mathematics
1 answer:
dolphi86 [110]3 years ago
5 0

Answer:

a) 8

b) -3.2, 0.8

c) see attached

Step-by-step explanation:

a) The y-intercept is the value of the expression when x=0. Since all the x-terms vanish in that case, the y-intercept is the constant, 8. Expressed as an ordered pair, it is (0, 8).

b) I personally find it useful to use graphing to find the x-intercepts to low or moderate precision. The attached shows them to be -3.2 and +0.8. (Graphing is <em>my</em> "process.")

The quadratic formula can be useful for finding the zeros when there is no obvious factorization. Here, we have a=-3, b=-7, c=8 to put into the formula

... x = (-b±√(b²-4ac))/(2a)

... x = (-(-7)±√((-7)²-4(-3)(8)))/(2(-3)) = (7±√145)/-6 ≈ -1.167 ± 2.007

... x ≈ {-3.2, 0.8}

You might be interested in
How many one and a half L bottles does it take to fill a 16 L jug
malfutka [58]

Answer:

this answer is

Step-by-step explanation:

<em>11 bottles approximately.</em>

6 0
3 years ago
Read 2 more answers
Pls pls help help help
Misha Larkins [42]

Answer:

the diameter form for your help today with the app

Step-by-step explanation:

pa brain less

8 0
3 years ago
A student would like to find the height of a statue. The length of the​ statue's right arm is 54 feet. The​ student's right arm
Komok [63]

Answer:


a) Approximate height of the statue: 144 feet

b) The approximate height is 1.7% greater that the actual height of the statue.


Explanation


1) Assume that the measures of the statue are proportional to the dimensions of the student. That means:


        statue's height                                   student's height

________________________   =    ______________________

length of the​ statue's right arm          length of student's right arm


⇒ x / 54 feet = (5 + 1/3) feet / 2 feet


⇒ x = 54 × (16/3) / 2 feet = (54×16) / (3×2) feet = 144 feet


Answer: 144 feet


2) Compare the approximate heigth obtained with the actual height:


144 feet - (143 feet + 9 inches) = 144 feet - (143 feet + 9/12 feet) = 1 feet - 9/12 feet


1 feet - 9/12 feet = 1 feet - 3/4 feet = 1/4 feet.


Hence, the approximate feet obtained is 1/4 feet larger than the actual height.


In relative terms that is : (1/4) / (143 + 3/4) = 0.0017 = 1.7%.

4 0
3 years ago
The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 55 o
Usimov [2.4K]

Answer:

a) For this case and using the empirical rule we can find the limits in order to have 9% of the values:

\mu -2\sigma = 55 -2*6 =43

\mu +2\sigma = 55 +2*6 =67

95% of the widget weights lie between 43 and 67

b) For this case we know that 37 is 3 deviations above the mean and 67 2 deviations above the mean since within 3 deviation we have 99.7% of the data then the % below 37 would be (100-99.7)/2 = 0.15% and the percentage above 67 two deviations above the mean would be (100-95)/2 =2.5% and then we can find the percentage between 37 and 67 like this:

100 -0.15-2.5 = 97.85

c) We want to find the percentage above 49 and this value is 1 deviation below the mean so then this percentage would be (100-68)/2 = 16%

Step-by-step explanation:

For this case our random variable of interest for the weights is bell shaped and we know the following parameters.

\mu = 55, \sigma =6

We can see the illustration of the curve in the figure attached. We need to remember that from the empirical rule we have 68% of the values within one deviation from the mean, 95% of the data within 2 deviations and 99.7% of the values within 3 deviations from the mean.

Part a

For this case and using the empirical rule we can find the limits in order to have 9% of the values:

\mu -2\sigma = 55 -2*6 =43

\mu +2\sigma = 55 +2*6 =67

95% of the widget weights lie between 43 and 67

Part b

For this case we know that 37 is 3 deviations above the mean and 67 2 deviations above the mean since within 3 deviation we have 99.7% of the data then the % below 37 would be (100-99.7)/2 = 0.15% and the percentage above 67 two deviations above the mean would be (100-95)/2 =2.5% and then we can find the percentage between 37 and 67 like this:

100 -0.15-2.5 = 97.85

Part c

We want to find the percentage above 49 and this value is 1 deviation below the mean so then this percentage would be (100-68)/2 = 16%

4 0
4 years ago
Two perpendicular lines intersect at the origin. If the slope of the first line is .5, what is the equation of the second line?.
Sedaia [141]
The origin is at the point (0,0). Therefore, the y-intercept will be 0. For two points to be perpendicular, the slopes must be opposite reciprocals of each other. .5 can be seen as 1/2, so the reciprocal is 2, and it is positive, making that 2 negative. Your equation would be y = -2x. 
3 0
4 years ago
Other questions:
  • *WILL MARK BRAINLIEST*
    12·1 answer
  • What is the width of this shape
    14·1 answer
  • Jerry has 3y comics. Shaun had 8 comics. They share the comics equally. How many comics does each get?
    6·1 answer
  • Find the product 3 • ( -7 )
    15·1 answer
  • Fill in the missing number to complete the linear equation that gives the rule for this table.
    10·2 answers
  • In a certain population of women, 4 percent have had breast cancer, 20% are smokers, and 3% are smokers and have had breast canc
    14·1 answer
  • Find the area of a circle with a circumference
    9·2 answers
  • What is the equation of the line that passes through the points (4, –1) and (3, 5)?
    9·1 answer
  • The wholesale price for a desk is $147 . A certain furniture store marks up the wholesale price by $30 . Find the price of the d
    6·1 answer
  • KITE is a kite.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!