Answer:
a.) -9
Step-by-step explanation:
Because any negative number is less than a positive number, and if you chose 2 they would be equal. and -9 is more than -6 so -9.
i need help with #11 and #12
9514 1404 393
Answer:
11. y = -1/4x² +1
12. y = 1/6(x -3)² +5/2
Step-by-step explanation:
Since 9-12 are all the same, we can solve the problem generically and plug in the given numbers. Let the focus be (a, b) and the directrix be y=d.
The vertex is halfway between the focus and directrix, so its coordinates will be (a, (b+d)/2). The distance from focus to directrix is b-d. Given these conditions, the equation of the parabola is ...
y = 1/(2(b-d))(x -a)² +(b+d)/2
__
11. For (a, b) = (0, 0) and d = 2, the equation is ...
y = 1/(2(0-2))(x -0)² +(0+2)/2
y = -1/4x² +1
__
12. For (a, b) = (3, 4) and d = 1, the equation is ...
y = 1/(2(4-1))(x -3)² +(4+1)/2
y = 1/6(x -3)² +5/2
__
The attachments show the graphs of these. You can verify the graph by noticing ...
a) the vertex is halfway between the focus and directrix
b) a horizontal line from the focus to the curve is the same length as a vertical line from the directrix to the same point on the curve
Which of the following statements about absolute value is not true?
A.absolute value is the sign of the number
B.absolute value is the distance from zero
C.numbers have a sign and a size
D.absolute value is the size of the number
Step-by-step explanation:
A. Absolute value is the sign of the number.
A air traffic control system is tracking two fighter jets, both of which are flying at the same altitude and their directed distance is measured in kilometers. If they have coordinates of (4, 150°) and (2, 195°), find the distance between the two jets.
Answer:
The distance between the two jets is approximately 2.947 kilometers.
Step-by-step explanation:
From the statement we know the location of each jet in polar coordinates, which are defined by the following notation:
[tex]\vec r = (r, \theta)[/tex] (1)
Where:
[tex]r[/tex] - Distance of the jet from the origin, measured in kilometers.
[tex]\theta[/tex] - Angle of the jet with respect to the east direction, measured in sexagesimal degrees.
To transform polar coordinates into rectangular coordinates, we use the following expressions:
[tex]x = r\cdot \cos \theta[/tex] (2)
[tex]y = r\cdot \sin \theta[/tex] (3)
And lastly, we determine the distance between the two jets ([tex]d[/tex]), measured in kilometers, by the Pythagorean Theorem:
[tex]d = \sqrt{(r_{2}\cdot \cos \theta_{2}-r_{1}\cdot \cos \theta_{1})^{2}+(r_{2}\cdot \sin \theta_{2}-r_{1}\cdot \sin \theta_{1})^{2}}[/tex] (4)
If we know that [tex]r_{2} = 4\,km[/tex], [tex]\theta_{2} = 150^{\circ}[/tex], [tex]r_{1} = 2\,km[/tex] and [tex]\theta_{1} = 195^{\circ}[/tex], the distance between the two jets is:
[tex]d = \sqrt{[(4\,km)\cdot \cos 150^{\circ} -(2\,km)\cdot \cos 195^{\circ}]^{2}+[(4\,km)\cdot \sin 150^{\circ} -(2\,km)\cdot \sin 195^{\circ}]^{2}}[/tex]
[tex]d \approx 2.947\,km[/tex]
The distance between the two jets is approximately 2.947 kilometers.
Plz help!! (I just copied and pasted it)
The video store rents DVDs for $3.00 each and video games for $4.50 each. Write an equation in standard form for the number of DVDs d and video games g that a customer could rent with $18. Graph the equation and give me three combinations of DVD’S and video games.
Step-by-step explanation:
3d + 4.5g <= 18.
3 possible combinations are:
0 DVD and 4 Video games,
1 DVD and 3 Video games,
2 DVDs and 2 Video games.
Answer:
3 possible combinations are:
0 DVD and 4 Video games
1 DVD and 3 Video games
2 DVDs and 2 Video games
Step-by-step explanation:
Paper towels come in two packages. The first package has a single roll of paper towels that has
150 sheets on the roll and costs $1.80. The second package contains three rolls, each of which
has 80 sheets on a roll and costs $2.50. Determine the cost per sheet for each and which is the
better buy
Answer:
660
Step-by-step explanation:
Nalini thinks of an number. She doubles it and adds 5. Her answer is sixteen more than the number she thought. What number did Nalini think of? a) 10 b) 11 c)12 d) 6
Answer:
B. 11
Step-by-step explanation:
We can try it for each
10*2+5=25
25-10=15❌
11*2+5=27
27-11=16 ✔
12*2+5=29
29-12=17❌
6*2+5=17
16-6=11❌
So it's B
The
says that the i
of the interior angles in a triangle
180 degrees.
The value of "x" isi
The measure of Angle A is :
degrees.
The measure of Angle B is :
degrees.
Plz help I sad today
I will give brainliest
Answer:
1. 18(2+3)
2. Dylan needs 1.375 more liters
Step-by-step explanation:
1. 36 and 54
2x3x3x2 =36
54 = 2x3x3x3
common factor = 3x3x2 or 18.
1. 18(2+3)
2.5-1.125
2.5000
- 1.125
1.375
Hope this helps!
Btw, i answered your question before!
factorize 4x^2 - 169y^2
Step-by-step explanation:
4x² - 169y² can be factorised as (2x + 13y)(2x - 13y).
10. A tanning salon charges a one-time maintenance fee of $12 plus $4 for each tanning visit. Find a reasonable domain and range for the function for up to 6 visits.
does anyone know how to find the values of Y in a function table?
Answer:
1 - 5
2 - 7
Step-by-step explanation:
Plug the x values into the equation.
I can't see to do all of them, so I'll just do the first two.
1. y=2(1)+3
= 2 + 3 = 5
2. 2(2) + 3
= 4 + 3= 7
i need help real quick
Answer:
sorrie
Step-by-step explanation:
nothing here ;)
Answer:
with what I'm here to awnser
Solve with steps please! *EASY*
Step-by-step explanation:
3x-5y =13......eq(1)
x+4y=10....eq (2)
multiply the eq 2 with 3
then it becomes,
3x+12y=30
Subtracting eq2 from eq 1
3x-3x-5y-12y=13-30
-17y=-27
y=1.588
x+6.352=10
x=3.648
Answer:
i am very positive that the answer is 6'1
A piece of paper has a
rectangle ABCD in which
AB - 10cm and BC = 22 cm,
it was folded to form a
right circular cylinder
such that AB is Cincident
to DC Find the volume of
the resulted cylinder
Answer:
The volume of the resulting cylinder is 385 cm³
Step-by-step explanation:
The formula of the rule of a cylinder is V = π r² h, where
r is the radius of its baseh is the height of itWhen a rectangular paper folded to form a cylinder, then one of its dimension will be the circumference of the base and the other dimension will be the height of the resulted cylinder
∵ ABCD is a rectangle
∵ It is folded where AB coincides with DC
∴ AB is the height of the resulted cylinder
∴ BC is the circumference of the base of the resulted cylinder
∵ AB = 10 cm
∴ h = 10 cm
∵ BC = 22 cm
∴ The circumfrence of the base = 22 cm
∵ The circumference of a circle = 2 π r
→ Equate the rule by 22 to find r
∴ 2 π r = 22
∵ π = [tex]\frac{22}{7}[/tex]
∴ 2 × [tex]\frac{22}{7}[/tex] × r = 22
∴ [tex]\frac{44}{7}[/tex] r = 22
→ Divide both sides by [tex]\frac{44}{7}[/tex]
∴ r = 3.5 cm
→ Use the formula of the volume above to find the volume of the cylinder
∵ V = [tex]\frac{22}{7}[/tex] × (3.5)² × (10)
∴ V = 385 cm³
∴ The volume of the resulted cylinder is 385 cm³
the public library has 1,845 new books and 4,527 old books. Micah puts the same number of books on 9 shelves. How many books did he put on each shelf
Answer:
708 books on each shelf!!?!!
Step-by-step explanation:
1,845 + 4,527 = 6372
6,372 ÷ 9 = 708
If I am right, please give me brainliest!!!!
- Hermionia
write the following number in standard form decimal
Answer:
0.0001825
Step-by-step explanation:
First you find out what 10 to the -4th power is after that you multiply the decimal shown (1.825) you start moving the number behind the decimal and you have your answer 0.0001825
Answer:
0.0001825
Step-by-step explanation:
Which pair of angles are vertical angles?
/_ZRQW and /_ZWQV
/_ZRQT and /_ZTQV
/_ ZRQW and /_ZTQU
/_ZRQS and /_ZSQU
Answer:
(c) is correct.
Step-by-step explanation:
When two lines cross each other, the angles opposite to each other are called vertically opposite angles. They are always equal.
In this given figure,
Line TW and RU cross each other at Q, it means
[tex]\angle RQW=\angle TQU[/tex] (vertically opposite angles)
Hence, the correct option is (c).
A restaurant customer left $1.30 as a tip. The tax was 7% and the tip was 10% of the after tax cost. Which information is not needed to compute the bill after tax and tip? What was the total bill?
Answer:
Step-by-step explanation:
Given that:
Tip left = $1.30
Tax = 7%
Tip = 10% of after tax cost
The tax percentage is not needed in calculating the bill after tax and tip
Hence,
Let after tax cost = x
10% of x = 1.30
0.1x = 1.30
x = $13
After tax cost = $13
Hence, the Total bill after tax = $13
Yesterday, Bethany sent 60 text messages. She said that 15% of those
messages were to her best friend. How many text messages did Bethany
send to her best friend yesterday?
Answer:
9
Step-by-step explanation:
60*0.15 is 9
Hope this helps plz hit the crown :D
Good Morning :^)
Question:
Yesterday, Bethany sent 60 text messages. She said that 15% of those
messages were to her best friend. How many text messages did Bethany
send to her best friend yesterday?
Well, let's figure this out!
Y is 15% of 60
Equation: Y = P% × X
First Step: Solve our equation for Y
Y = P% × X
Y = 15% × 60
Second Step: Convert percent to decimal:
p = 15%/100 = 0.15
Y = 0.15 * 60
Y = 9
Answer: Yesterday, Bethany sent 9 text messages to her best friend.
−2/3(15x + 3) = −3x − 9
what is x?
Answer:
X=1
Step-by-step explanation:
-10x-2=-3x-9
-10x-2+2=-3x-9+2
-10x=-3x-7
-10x+3x=-3x-7+3x
-7x=-7
Then divide both sides by -7
x=1
What is the mean absolute deviation of the following set of data?
10
20
12
4
18
8
14
18
Answer:
The mean absolute deviation of the following set of data is 4.5
Step-by-step explanation:
We need to find the mean absolute deviation of the following set of data.
10,20,12,4,18,8,14,18
For finding mean absolute deviation, first we need to find the mean of the given data set.
The formula used to calculate mean is: [tex]Mean=\frac{Sum\:of\:all\:data\:points}{Number\:of\:data\:points}[/tex]
Sum of all data points: 10+20+12+4+18+8+14+18 = 104
Number of data points = 8
So, mean is:
[tex]Mean=\frac{Sum\:of\:all\:data\:points}{Number\:of\:data\:points}\\Mean=\frac{104}{8}\\Mean=13[/tex]
Now, we will subtract 13 from the given data points:
10 - 13 = -3
20 - 13 = 7
12 - 13 = -1
4 - 13 = -9
18 -13 = 5
8 - 13 = -5
14 - 13 = 1
18 - 13 = 5
We will take absolute values i.e |-a|=a
So, now the numbers will be:
3,7,1,9,5,5,1,5
We will now find absolute mean deviation by finding mean of newly calculate values
Sum of all data points = 3+7+1+9+5+5+1+5
Number of data points = 8
[tex]Mean=\frac{Sum\:of\:all\:data\:points}{Number\:of\:data\:points}\\Mean=\frac{36}{8}\\Mean=4.5[/tex]
So, the mean absolute deviation of the following set of data is 4.5
Solve the equation.
4(x – 6) = 16
A. 8
B. 10
C. –10
D. 12
Answer:
a.
Step-by-step explanation:
its 8 hope this helps!
Answer:
B (x=10)
Step-by-step explanation:
A) Distribute 4 to x and -6 (basically multiply 4 to x, then 4 to -6)
B) (Resulting equation): 4x-24=16
C) Add +24 to each side of the equation
D) (Resulting equation): 4x=40
E) Divide each side by 4 in order to isolate the x variable
F) (Resulting equation): x=10
As an estimation we are told 5 miles is 8 km.
Convert 52.5 miles to km.
Answer:
approximately 84.5
Step-by-step explanation:
Select all the fractions that are equal to 4.9 Group of answer choices LaTeX: \frac{490}{10}490 10 LaTeX: \frac{49}{10}49 10 LaTeX: \frac{490}{100}490 100 LaTeX: \frac{49}{100}49 100 LaTeX: \frac{490}{1000}490 1000 LaTeX: \frac{49}{1000}
Answer:
thats a lot hold up
Step-by-step explanation:
During a sale, a dress is marked down from a selling price of $68 to a sale price of $44.20. What is the percent markdown?
Answer:
35%
Step-by-step explanation:
what is the numbers in PI {pi} im confused is it 3.4578949 or is it 3.5478749?
Answer:
just use the pie sign in your calculator
pi = 3.1415926535898
This is something you either memorize, have on a flashcard, or just let your calculator handle the details. The digits of pi are effectively random and do not repeat with a known pattern.
A statistical hypothesis testing procedure is conducted over 5000 patients about some health intervention. The p-value is 0.02. Which is true? Group of answer choices If the null hypothesis was true, the probability of observing a difference at least as large as the observed diference would be 2% the probability of observing a difference at least as large as the observed diference is 2%
Answer:
The answer is "The first choice"
Step-by-step explanation:
In the given question the first choice is correct because When the zero assumption was valid, it would have been at least as bad to also be 2% to demonstrate a discrepancy as observed difference.
The Environmental Club is selling water bottles for $8 each and tote bags for $12 each to raise a total of $240 to donate to charity.
Let w = the number of water bottles
Let t = the number of tote bags
Write the linear equation for the fundraising goal.
Answer:
hi
Step-by-step explanation:
today at Allison's cupcake and cookie budget for her party at $105 if you would like to have at least 40 cupcakes and cookies combined and would like to have at most five more cupcakes and cookies if cupcakes sell for $2.50 and cookies for $1.50 which system of inequalities could help Allison determine possible numbers of cupcakes and cookies that she will buy
Answer:
a ≤ b + 5
a + b ≥ 40
2.5 a + 1.5 b ≤ 105
Step-by-step explanation:
What is the slope of this line?
Enter your answer as a whole or a fraction in simplest form.
Answer:
Step-by-step explanation:
(-2,0) (0, -2) = (-2 - 0)/(0 + 2) = -2/2= -1
y - 0 = -1(x + 2)
y = -x - 2
slope is -1