Plot these numbers on the number line:
V2, V5, 3v8, v9, v15, 3v25
please help!!!
Solve (find x intercepts) using the quadratic formula
f(x)= -5x^+9x-4
Answer:
[tex]x[/tex]-intercepts at [tex](1,0)[/tex] and [tex](0.8,0)[/tex]
Step-by-step explanation:
A quadratic in the form [tex]ax^2+bx+c=y[/tex] crosses the [tex]x[/tex]-axis when [tex]y=0[/tex].
The first step is replacing [tex]f(x)[/tex] with [tex]y[/tex].
So: [tex]y= -5x^2+9x-4[/tex]. With the information above, we can find the [tex]x[/tex] intercepts by setting [tex]y = 0[/tex].
Therefore [tex]0=-5x^2+9x-4[/tex].
Now we can use the quadratic formula because it is in the form [tex]ax^2+bx+c=0[/tex].
Note the quadratic formula: [tex]\frac{-b\frac{+}{-}\sqrt{b^2-4ac} }{2a } = x[/tex].
To find the values of [tex]a[/tex],[tex]b[/tex] and [tex]c[/tex] we can compare the equation to the general equation.
Therefore: [tex]a=-5[/tex], [tex]b=9[/tex] and [tex]c=-4[/tex].
Now put these values into the quadratic formula:
[tex]\frac{-9\frac{+}{-}\sqrt{(9)^2-4(-5)(-4)} }{2(-5) } = x[/tex]
And simplify:
[tex]\frac{-9\frac{+}{-}\sqrt{81-80} }{-10 }[/tex] , [tex]\frac{-9\frac{+}{-}\sqrt{1} }{-10 }[/tex].
[tex]\sqrt{1} =1[/tex], therefore [tex]x = \frac{-9\frac{+}{-}1 }{-10 }[/tex]
Now we can have two values for [tex]x[/tex]. One when we take away the discriminant ([tex]b^2-4ac[/tex]) and one when we add it.
So [tex]x = \frac{-10}{-10} = 1[/tex]
or
[tex]x = \frac{-8}{-10} = 0.8[/tex]
Therefore [tex]x[/tex]-intercepts at [tex](1,0)[/tex] and [tex](0.8,0)[/tex]
choose 3 values that would make this inequality true 28 + x > 42
100
0
13
15
5
14
24
Answer:
100, 15, 24 I think that is it
Step-by-step explanation:
Answer: 100, 24, 15
Step-by-step explanation:
28+100= 128, 128>42
28+24=52, 52>42
28+15=43, 43>42
PLZ HELP 50 POINTS Which is the function represented by the table?
A 2-column table with 4 rows. Column 1 is labeled x with entries negative 1, 0, 1, 2. Column 2 is labeled f (x) with entries 4, 5, 6, 7.
Answer:
the answer is a f(x)= x+5.
Step-by-step explanation:
the answer is f(x)= x+5 because in each row the value increases by 5.
Answer:
a
Step-by-step explanation:
A chemical company mixes pure water with their premium antifreeze solution to create an inexpensive antifreeze mixture. The premium antifreeze solution contains 70% pure antifreeze. The company wants to obtain 140 gallons of a mixture that contains 20% pure antifreeze. How many gallons of water and how many gallons of the premium antifreeze solution must be mixed
Answer:
40 gallons of premium antifreeze and 100 gallons of water should be used to obtain 140 gallons of a mixture that contains 20% pure antifreeze.
Step-by-step explanation:
Since a chemical company mixes pure water with their premium antifreeze solution to create an inexpensive antifreeze mixture, and the premium antifreeze solution contains 70% pure antifreeze, and the company wants to obtain 140 gallons of a mixture that contains 20% pure antifreeze, to To determine how many gallons of water and how many gallons of the premium antifreeze solution must be mixed, the following calculation must be performed:
50 x 0.7 + 50 x 0 = 35
40 x 0.7 + 60 x 0 = 28
30 x 0.7 + 70 x 0 = 21
29 x 0.7 + 71 x 0 = 20.3
28.57 x 0.7 + 71.43 x 0 = 20
140 x 0.2857 = 40
Therefore, 40 gallons of premium antifreeze and 100 gallons of water should be used to obtain 140 gallons of a mixture that contains 20% pure antifreeze.
Describe the steps you can use to graph the function y=2x^2-8
Answer:
The first thing you need to find is the axis of symmetry by using
-b/2a
after you find that, use it to find the vertex of
x
2
+
8
In this case x should equal
0
so
y
=
0
2
+
8
giving just 8
the y-intercept is 8 as
c
=
8
the graph should look like this
graph{x^2+8 [-11.5, 8.5, 0.84, 10.84]}
it is a parabola.
https://socratic.org/answers/466874
or https://socratic.org/answers/466890
Step-by-step explanation:
Can someone please help me out with this question please I beg you no links
What is "y" when x = -2 in the equation y = 2x + 5
Answer:
2 x -2 + 5
-4 + 5
1 = y
Step-by-step explanation:
Plug in the value of X and do the equation.
Answer:
y = 1
Step-by-step explanation:
When x = -2 :
y = 2x + 5
y = 2(-2) + 5
y = -4 + 5
y = 1
Find KL pls fast correct answer
Answer:
14Step-by-step explanation:
According to intersecting secants theorem:
KL*JL = ML²Substitute values and solve for x:
(x - 1)(x - 1 + 7) = 12²(x - 1)(x + 6) = 144x² - 5x - 6 = 144x² - 5x - 150 = 0x² - 15x + 10x - 150 = 0x(x - 15) + 10(x - 15) = 0(x - 15)(x + 10) = 0x = 15x = -10 (ignored as negative)Find the value of Kl
KL = x - 1 = 15 - 1 = 14plzzzz help im stuck hurry pls
Answer:
x ≥ -2
Step-by-step explanation:
x is greater than or equal to -2
x≥ -2
hi! please help i’ll give brainliest
Answers:
deposition of eroded materials
Step-by-step explanation:
25% of what number equals 100
Answer:
its 400
Step-by-step explanation:
Which measure describes the standard error of the mean?
A.
the central limit theorem
B.
the confidence interval
C.
the sample mean
D.
the standard deviation of the means
Answer: the standard deviation of the means (D)
Step-by-step explanation:
I would ask a question but half the mfkas on here have failed me so many tests. So I j want to let you guys know that you all are r e t a r t e d.
Answer:
please dont use the r slur :)) and if you care so much about your grades, heres an idea!! study on your OWN and dont rely on others
Step-by-step explanation:
An airplane takes off 12.5 miles south of a city and flies due north at a constant speed of 170 miles per hour. What is the planes position relative to the city after 45 minutes
Solve for x. The figure is a parallelogram
Answer:
x = 1
Step-by-step explanation:
The opposite angles in a parallelogram are congruent, then
94x + 1 = 95 ( subtract 1 from both sides )
94x = 94 ( divide both sides by 94 )
x = 1
Simplify the product. Write your answer in standard notation 2y(5y^2 + 3)
Answer:
10y^3+6y
Step-by-step explanation:
ITS URGENT!!!!
SOMEBODY PLEASE HELP ME WITH THIS QUESTION!! YOU CAN SEE ALL THE ANSWER CHOICES IN THE PICTURE ABOVE!!! THANK YOU
Answer:
A
Step-by-step explanation:
y=2(x-3)^2-3
replace x for x in the table
so y=2(1-3)^2-3
-2*-2
4*2
8-3
y=5
just like in the table
PLEASE HELP IT'S URGENT!!!
The coordinate grid shows the graph of four equations:
A coordinate grid is shown from negative 12 to positive 12 on the x axis and also on the y axis. Line A passes through the ordered pairs negative 3, 4 and 9, negative 2. Line B passes through the ordered pairs 2, 8 and 8, negative 8. Line C passes through the ordered pairs negative 3, negative 4 and 4, 6. Line D passes through the points 2, negative 2 and 5 and 6.
Which set of equations has (1, 2) as its solution? (5 points)
Select one:
a. A and D
b. C and D
c. A and C
d. B and D
Answer:
C. A and C
Both pass by (1,2)
PLEASE HELP ME 15 POINTS
1- Which vehicle has the better gas mileage? Explain your reasoning using a line graph comparing the number of gallons to the number of miles covered.
2- Describe the graph:
Put these numbers in smallest to largest
3.07, 3.7, 3.77, 7.3, 7.33
A box contains 20balls,x of which are white.if the probability of selecting a non white ball at random is 3/5.find the value of x
Answer:
8
Step-by-step explanation:
So there are 20 balls.
3/5 of them are NOT white.
This means 2/5 of them ARE white.
So knowing this, lets find the number of white balls(x).
To do this, lets multiply the 20 total balls by the 2/5 of them that are white:
20/1*2/5
=
40/5
=
8
So we know that 8 of the balls are white!
Hope this helps! :)
A game has 50 cards with 10 each numbered 1 to 5,and a player must draw a 2 or a 3 to move out of the "start" position.
Answer:
The question isn't complete, so I will assume that we want to find the probability of moving out of the start position.
First, we know that there is a total of 50 cards.
of these 50 cards, we have:
10 with the number 1
10 with the number 2
10 with the number 3
10 with the number 4
10 with the number 5
To move out of the starting position, we need to draw a 2 or a 3.
And we have 10 of each, then there are 20 cards that allow us to move out of the start position.
The probability of moving out of the starting position in the first draw, is equal to the quotient between the number of cards that allow us to move out of the starting position (20) and the total number of cards (50), this is:
P = 20/50 = 2/5 = 0.4
In Stacia's town, 60% of registered people vote
regularly. A spinner with equal-sized sections
numbered 0 to 9 can be used to represent those
who do and
do not vote.
a. What numbers can be assigned to represent
those who do vote and those who do not vote?
Answer:
6 Voted , 4 Not Voted
Step-by-step explanation:
10 sections, so 0.60 * 10 = 6 sections Voted
0.40 * 10 = 4 sections not Voted
Find the area of that with explanations thanks
Answer:
900m or 300m
Step-by-step explanation:
45 x 20 = 900
30 x 10 = 300
PLEASE ANSWER I NEED LOTS OF HELP!!!!!!!!!!!!!!
Answer:
40%
Step-by-step explanation:
Rachael liked 36/90 books movies that she watched. This simplifies to 2/5 which is 0.4. To find the percentage, we multiply 0.4 by 100 to get 40%.
600 students sat a Math exam. If 86% of students passed the exam, the percentage of people who FAILED is
with step to step calculation
Answer:
84
Step-by-step explanation:
100-86 is 14
14percent passed so it is 84
Someone plz help me I beg u plz I need this I’ll really appreciate it
Answer:
i cant see the words
Step-by-step explanation:
hey i’ll give brainliest please help
Answer:
I believe it would be C if not then im sorry
Step-by-step explanation:
Which point best represents 10?
P
Q
R
S
wt
0
1
2
4
5
S
P
R
Q
Answer:
Q
Step-by-step explanation:
The square root of √10 shown in decimal form is 3.1622776... and the placement of Q is the closest to the answer.