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trapecia [35]
3 years ago
8

Still need help on this please need help

Mathematics
1 answer:
Goryan [66]3 years ago
6 0
The discriminant is the value of b²-4ac
in this case, b=-8, a=4, c=4, so the discriminant is (-8)²-4*4*4=0
when the discriminant is 0, there is one rational solution. 
when the discriminant is larger than 0, there are two rational solutions.
when the discriminant is smaller than 0, there are no real solutions. <span />
You might be interested in
The Department of Education wishes to estimate the proportion of all college students who have a job off-campus. It surveyed 160
NeX [460]

Answer:  2. All college students

Step-by-step explanation:

A population is a large group of individuals that have some common feature by the researcher's point of interest.

Herero , the Department of Education wishes to estimate the proportion of all college students who have a job off-campus.

So , he need data of all students to compute the exact proportion.

But instead of that he surveyed 1600 randomly selected students which determine the sample.

Sample just gives the estimate of the parameter.

Hence, the population of interest to the Department of education is " All college students" .

7 0
3 years ago
In how many ways can 4 singers be selected from 8 who came to an audition?
elena-s [515]

The first selection can be any one of the 8. 
               For each one ...
The second selection can be any one of the remaining 7. 
               For each one ...
The third selection can be any one of the remaining 6. 
               For each one ...
The fourth selection can be any one of the remaining 5.

Total number of ways to select four = (8 x 7 x 6 x 5) = 1,680 ways

BUT ... There are not 1,680 different groups of 4 .

Each group of 4 can be selected in (4 x 3 x 2) = 24 different ways.

So, although there are 1,680 different ways to select 4 singers,
there are only
                           (1,680 / 24) = 70 different groups of 4
                                                     that you can end up with.

7 0
3 years ago
Can someone plz help me with this one problem plzzzzz!!!!!
lesantik [10]

Answer:

5 = 60.    6 = 72.      8 = 96

Step-by-step explanation:

60 = 12 x 5

72 = 12 x 6

84 = 12 x 7

96 = 12 x 8

6 0
2 years ago
Read 2 more answers
Please tell me, how do i solve percentages? And yes, i know there is more than one way. Please tell me the methods to solve all
Bumek [7]
I'll give a practice problem to help explain it a bit better.

Here, let's try to solve 45% of of 60.

First, we convert the percentage into a decimal. To turn any percentage into a decimal you move the point two spaces to the left.

That means 45% as a decimal is .45.

Next, we multiply our number, 60, by the decimal .45.

60×.45=27.

That means 45% of 60 is 27.

To sum it all up, you have to get the percentage, move the decimal point two spaces to the left, and multiply it by the number you were trying to find the percentage of.

Have a wonderful day! :)
5 0
3 years ago
Can you please help me out with a question
Finger [1]

The standard equation of a circle is expressed as

(x - h)^2 + (y - k)^2 = r^2

where

h is the x coordinate of the center of the circle

k is the y coordinate of the center of the circle

r is the radius of the circle(the distance from the center of the circle to the circumference

From the graph,

h = - 1

y = 4

r = 5

By substituting these values into the equation, we have

(x - - 1)^2 + (y - 4)^2 = 5^2

(x + 1)^2 + (y - 4)^2 = 25

Thus, the equation of the circle is

(x + 1)^2 + (y - 4)^2 = 25

8 0
1 year ago
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