Answer:
94
Step-by-step explanation:
Average = sum of numbers / number of items in the set
for the first list, the average is 90 and there are four numbers, the sum of the numbers is 90 x 4 = 360
If the 4th number is 80, the sum of the first 3 numbers = 360 - 80 = 280
so the sum of the first three numbers on the second list is 260. The fourth number is 96. The sum of the numbers = 280 + 96 = 376
Average of the new list = 376 / 4 = 94
Work out the size of angle x
Answer:
angle x=10
Step-by-step explanation:
Find f^-1(x) where
f(x) = 3x+2/x
Given:
Consider the function is
[tex]f(x)=\dfrac{3x+2}{x}[/tex]
To find:
The inverse of the function, .i.e., [tex]f^{-1}(x)[/tex].
Solution:
We have,
[tex]f(x)=\dfrac{3x+2}{x}[/tex]
Putting f(x)=y, we get
[tex]x=\dfrac{3y+2}{y}[/tex]
Isolate the variable y.
[tex]xy=3y+2[/tex]
[tex]xy-3y=2[/tex]
[tex]y(x-3)=2[/tex]
[tex]y=\dfrac{2}{x-3}[/tex]
Putting [tex]y=f^{-1}(x)[/tex], we get
[tex]f^{-1}(x)=\dfrac{2}{x-3}[/tex]
Therefore, the inverse function is [tex]f^{-1}(x)=\dfrac{2}{x-3}[/tex].
help me for brainlist please amelias
Answer:
b. V = 336 ft³
Step-by-step explanation:
[tex]V = \frac{1}{2}bhl\\b = 14\\h = 8\\l = 6\\V = \frac{1}{2}(14)(8)(6)\\V = 336 ft^{3}[/tex]
I BET NO ONE KNOWS THIS What is the number of moles of Ba(NO3)2 in 135 g Ba(NO3)2? _____ mol Ba(NO3)2
Answer:
261.3368
Step-by-step explanation:
Please help! how do i know if it’s sin, cos, or tan if they’ve already given me all three numbers ?
Answer:
Here you can use any!
sin x = 64/80
cos x = 48/80
tan x = 64/48
i need help on number 8
Answer:
Step-by-step explanation:
3.8
Hope it helps
Please mark brainest
HELP URGENTLY NEEDED STUCK ON THIS FOR 2 DAYS!!!!! LOTS OF POINTS FOR PERSON WHO HELPS!!!
Jada is three years older than twice her brother’s age. Select all the equations that correctly represent the relationship between Jada’s age j and her brother’s age b.
Multiple select question.
A) j=2b+3
B) j=2(b+3)
C) j=b2−3
D) b=2j+3
E) b=j−32
F) b=j2−3
Answer:
A
Step-by-step explanation:
2b meaning two times the age then add three like the question says.
When 12 is multiplied by a number , the result is 72 which equation fits the statement ? X/12-72 12x=72 12+x=72 12/x=72
Answer:wef
Step-by-step explanation:
Answer:
Its B
Step-by-step explanation:
pls help will mark brainliest !
Answer:
third and fourth one.
Not sure tho
what is 3r + n^2 + 3n + r + 5 + 2n + 2 simplified?
Answer: n^2+5n+4r+7
Step-by-step explanation:
NEED HELP ASAP PLS PLS PLS 30 POINTS PLSSS
it’s algebra 2
Answer:
if the ratio is 7/10 then do 10/400 and it will be 28 days
Step-by-step explanation:
Given the equation of line y = -2x : Does the point M( 1/2 , 1) belong to the graph?
PLEASE HELP ME! I promise to mark brainliest if you give me the correct answer. Thank you!!
Answer:
no it does not belong to the graph
Step-by-step explanation:
plug in the x-coordinate and see if it gives you the y-coordinate (1). if 1 is what comes out, then it is not a point on the graph.
y = -2(1/2)
y = -1
y = -1 when x = 1/2, which is not 1 so it does not belong to the graph
PLEASE HELPPPPPPPP....?.......
If a+b=15 and ab=54 then find
1)
[tex] {a}^{2} + {b}^{2} [/tex]
2)
[tex](a - b )^{2} [/tex]
3)
[tex]a ^{2} - {b}^{2} [/tex]
Answer:
a = 9
b = 6
I hope you can do the rest yoyrself, as I coulsnt find how to type it out ;-;
Answer:
1) 117
2) 9
3) 45 or -45
Step-by-step explanation:
a=9
b=6
1) a²+b²=9²+6²=81+36=117
2) (a-b)²=(9-6)²=3²=9
3) a²-b²=81-36=45
It’s also possible that a=6 and b=9, in which case
1) (same)
2) (same)
3) 36-81=-45
If a shadow of a tree is 15 feet long. What is the height of the tree in feet
If you get the answer just give me the full answer please. No matter the length.
Answer:
CD = 4
Step-by-step explanation:
I believe you know the geometric mean for altitudes?
CD = √AD * DB = √8 * 2 = √16 = 4
If you are not aware of this theorem, then use the similarity of triangles.
ADC ~ CDB
AD/DC = CD/DB (cross-multiply)
CD^2 = AD*DB,
CD = √AD * DB = √8 * 2 = √16 = 4
Falling rock on another planet was detected as moving at the following speeds, corresponding to the time suggested in the table, which equation Can be used to find the speed of the rock at T seconds?
Answer:
B. s = 24t
Step-by-step explanation:
Since s varies directly with t, therefore, equation that will represent the relationship would take the form of s = my
m = rate of change
✔️Find the rate of change:
Rate of change using two given pairs, (0.5, 12) and (2.5, 60),
Rate of change (m) = ∆s/∆t = (60 - 12)/(2.5 - 0.5) = 48/2 = 24
✔️Substitute m = 24 into s = mt
s = 24t
WILL GIVE BRAINLEST
The length of a violin string varies indirectly with the frequency of vibrations of the string. When the length is 50 centimeters, the frequency is 2 Hz.
What is the frequency of a string 40 centimeters long?
Answer:
1.6 Hz
Step-by-step explanation:
I know this was posted a week ago, but, if you still need help:
You can set up a proportion, as follows.
50 / 2 = 40 / x => where x = frequency in Hz,
x = 2*40/50 = 80/50 = 8/5 = 1.6 Hz
Simple Question.
Dave is going to roll a die 60 times and see how often 1 falls.
According to the theoretical probability, how many shots must Dave make to expect to get 1?
Answer:
1,2,3,4,5,6 possibilities, so 1,3,5 are odd. 3/6 probability. consecutive rolls mean multiplication. 3/6 times 3/6 times.... a total of 5 times.
Step-by-step explanation:
Answer:
=1/6 x 60
=10
He should expect about 10 roles to show a 1.
anyone know what this 3 ⅞ x 3/10 = ?
EXACT FORM:
[tex] \frac{93}{80} [/tex]
OR,
MIXED NUMBER FORM:
[tex]1 \frac{13}{80} [/tex]
BOTH ANSWERS ARE CORRECT!
HOPE THIS HELPS!! :)
Subtract 2x2 – 1 from 4x2 + 2
Answer:
5 ig
Step-by-step explanation:
Answer:
7
Step-by-step explanation:
4x2= 8
8+2= 10
------
2x2 = 4
4-1=
3
-----
10-3=7
A rectangular piece of land has an area of 3/4 square mile. The land is 2 1/2 miles long. What is its width
Given:
A rectangular piece of land has an area of [tex]\dfrac{3}{4}[/tex] square mile.
The land is [tex]2\dfrac{1}{2}[/tex] miles long.
To find:
The width of the rectangular land.
Solution:
We have,
Area of a rectangle = [tex]\dfrac{3}{4}[/tex] square mile.
Length = [tex]2\dfrac{1}{2}[/tex] miles
We know that, area of a rectangle is
[tex]A=l\times b[/tex]
[tex]\dfrac{3}{4}=2\dfrac{1}{2}\times b[/tex]
[tex]\dfrac{3}{4}=\dfrac{2(2)+1}{2}b[/tex]
[tex]\dfrac{3}{4}=\dfrac{5}{2}b[/tex]
Multiply both sides by [tex]\dfrac{2}{5}[/tex], we get
[tex]\dfrac{2}{5}\times \dfrac{3}{4}=\dfrac{2}{5}\times \dfrac{5}{2}b[/tex]
[tex]\dfrac{6}{20}=b[/tex]
[tex]\dfrac{3}{10}=b[/tex]
Therefore, the width of the land is [tex]\dfrac{3}{10}[/tex] miles.
A store is selling a backpack thats is a wholesale price of $8.50. They marckup price is 50%. What did they sell the backpack for?
Answer:
$12.75Step-by-step explanation:
[tex]8.5+50\%\times8.5=8.5+0.5\times8.5=8.5+4.25=12.75[/tex]
HELP PLS HELP HELP HELP THIS IS ASAP
A Spanish teacher shares 10 maracas equally between 6 students. The number of maracas that each student gets lies between what two whole numbers?
1 and 2
4 and 5
3 and 4
6 and 7
Complete the square to find the missing term c.
x^2 – 12x + c
Alvin is 14 years older than Elga. The sum of their ages is 56. What is Elga's age?
Answer:
Elga is 32 years old.
Step-by-step explanation:
Let Alvin's age = A
Let Elga's age = E
Alvin is 10 years younger than Elga, so A = E - 10
The sum of their ages is 54, so A + E = 54
Replace the A in the second equation with E - 10, then solve for E.
A + E = 54 becomes (E - 10) + E = 54
Combine like terms
2E - 10 = 54
Add 10 to both sides
2E = 64
Divide both sides by 2
E = 32
can someone help me with this?! thanks!!
Answer:
you literally just translate each shape by the number of squares specified.
Step-by-step explanation:
for example, move shape 1 5 squares to the right, then 4 down. it will be in the middle area of quadrant 1 (where it already is).
Answer:
hope this helps you out good luck
A bird flies 5 miles per hour for 2 hours.
How far, in feet, does the bird travel in 2 hours?
Answer:
since u have the answer already i will just tell you a story
Step-by-step explanation:
once upon a time there were 3 little pigs and those pigs hated each other
so one day when there mother kicked them out of the house because they ate all of her pie, they had to go out and live on the streets. One pig got hungry so he ate a little kitten that was crossing the street. THE END.
hope u liked my story
GIVING BRAINLIEST! Please help.
A wooden right circular cylinder with diameter 9 cm and height 9 cm is topped with a hemisphere. The surface area, in cm^2, of the resulting shape is...
a) 141.75pie
b) 182.25pie
c) 162pie
d) 405pie
e) 18.25 + 60.75pie
Answer: answer is d
Step-by-step explanation:
i would explain but im helping 7 other people rn
Simplify
5 + 2(3x − 4) − x
[tex]5x - 3[/tex]
Step-by-step explanation:
1) Expand by distributing terms.
[tex]5 + 6x - 8 - x[/tex]
2) Collect like terms.
[tex](5 - 8) + (6x - x)[/tex]
3) Simplify.
[tex] - 3 + 5x[/tex]
4) Regroup terms.
[tex]5x - 3[/tex]
Therefor the answer for this equation will be, 5x - 3.
Answer:
5x-3
Step-by-step explanation:
distribute 2 to 3x and -4
then you get 5+6x-8-x
combine like terms
5-8; 6x-x
you get: 5x-3
hopes this helps