Given x+x-¹ = 11
now square both the side
(x+x-¹)² = 11²
now open the bracket of RHS and apply (a+b)²
you'll get,
x²+2x/x+ 1/x² =121
simplify above equation you'll get,
x²+ 2 + x-² = 121
shift the equation,
x² + x-² = 121 - 2
x² + x-² = 119 !
My brain operates on one brain cell I need help
11/50 as a percentage
Step-by-step explanation:
4. Ito ay baluktot na gawaing may kinalaman sa pagpapayaman nang
ilegal.
The total cost of 8 identical pens and 2 identical files is $32 The total cost of 3 such files is the same as the total cost of 4 such pens. Find the cost of each file
Answer:
$4
Step-by-step explanation:
Given that
total cost of 8 identical pens and 2 identical files is $32
And, the The total cost of 3 such files would be the same as the total cost of 4 such pens
We need to find out the cost of each file
So let us assume the following things
Pens be x
File be y
Now
8x + 2y = $32 ....(1)
3y = 4x.........(2)
y = 4x÷ 3
Now put the value of y in equation 1
8x + 1.33x = 32
x = $3.55
x = $4
The cost of each file based on the given information is $4
where:
Let the cost of a pen be xLet the cost of a file be ySimultaneous equationIf the total cost of 8 identical pens and 2 identical files is $32, hence;
8x + 2y = 32
If the total cost of 3 such files is the same as the total cost of 4 such pens, then;
4x = 3y
From the equation
8x + 2y = 32
2(4x) + 2y = 32
2(3y) + 2y = 32
8y = 32
y = 4
Since 6=4x = 3y
4x = 3(4)
4x = 12
x= 3
Hence the cost of each file is $4
Learn more on simultaneous equation here: https://brainly.com/question/6597041
Which mapping represents a function?
Which is not equivalent to 8/12
16/24
24/48
4/6
24/36
Answer:
The second one, 24/48
Brainliest would be great!
Answer:
24/48
Step-by-step explanation:
$3 subtracted from the cost of the book
Answer:
x = 11 explanation : " $3 subtracted from the cost of the book just number 8! " As an equation this would be : x - 3 = 8 SOLVE x - 3 = 8 + 3 + 3 x = 11 KEY x = cost of book
hope it helps
please help me complete these -5a^2+ 5a = _______(a – 1) and 18x^2 + 2x³ = _______(9 + x) I need to complete the blanks
Answer:
Step-by-step explanation:
-5a^2+ 5a factors as follows: -5(a - 1) (so -5 goes into the blank space).
18x^2 + 2x³ factors as follows: 2x^2(x + 9) (so 2x^2 goes into the blank space)
write an equation in slope-intercept form for a line that passes through the given point and that is perpendicular to the given line.
x= -7; (0.2)
would y= -1/2x -7 work? or no, because -7 is the slope for the one given above?
Answer:
Step-by-step explanation:
x= -7; (0.2)
x = 1.4
----------------
y =− 2 x −7
I really hope this helps
question 5 plz help !!!!!!!
Answer:
4.c5.aStep-by-step explanation:
#CARRY ON LEARNING#MARK BRAINLITSAnswer:
The answer is letter D.
why?
Step-by-step explanation:
Id.k -_-
j0ke
=
2
π
r
=
2
π
3
≈
18.84956
and that's it
HOPE IT HELPS
(FROM CROSS)
Plz help me no link PLZ NO LINKKSSS Thank you
just add them up! and then u shall be good
Answer:
36 units
Step-by-step explanation:
5 + 13 + 5 + 13
10 + 13 + 13
10 + 26
36
someone help please :(
Answer:
47 I believe
Step-by-step explanation:
5. A ladder leans against a building. The top of the ladder touches the building 10 feet above the ground. The foot of the
ladder is 4 feet from the building. Find, to the nearest degree, the angle that the ladder makes with the level ground.
(3 points)
Answer:
68 degrees
Step-by-step explanation:
The ladder, the building and the ground together make up a right triangle with angle of elevation to be determined.
The side opposite this angle is 10 ft; the distance of the foot of the ladder from the building is 4 ft. Thus,
tan x = (opp side) / (adj side) = 10/4. Using the inverse tangent function, we find that the angle in question is
arctan (10/4) = 68 degrees
A student has taken three math tests so far this semester. His scores for the first three tests were 71, 75, and 79. Part A: Suppose his test scores continue to improve at the same rate. What will be the grade on the sixth and (final) test?
Answer:
The grade of this sixth and (final) test would be 91.
Step-by-step explanation:
This is an arithmetic series since each time the data is increasing by the common difference of 4, and we already know a₁ which is the first term in the sequence is 71, therefore we can say:
a₁ = 71
r = 4
a₆ = the sixth term that needs to be found out
n = 6
Formula of an arithemetic series:
aₙ = a₁ + r(n - 1)
a₆ = 71 + 4(6 - 1)
a₆ = 71 + 4(5)
a₆ = 71 + 20
a₆ = 91
Hence, the grade of this sixth and (final) test would be 91.
Hope this helps!
hello please help i’ll give brainliest
Answer:
i think 8
Step-by-step explanation:
Answer:
Step-by-step explanation:
The answer is nine 100% sure
what is the result when the number 38 is decreased by 4%
Answer:
1.52
Step-by-step explanation:
38 decreased by 4% = 36.48
Absolute change (actual difference):
36.48 - 38 = - 1.52
Write the equation of a linear function and define one point that lies on this function. Write the equation of your function translated 4 units to the left and 5 units down. What are the coordinates of your new point?
please help, will give brainliest.
Answer:
13) 8r = 256; r = 32
14) f = 2(5)
15) 8t = 208; 208/8 = 26
Step-by-step explanation:
What is the simplified form of the following expression?
25xy sqrt 81/625x²y^2
Answer:
c
Step-by-step explanation:
edge 20220020
Answer:
D
Step-by-step explanation:
treust mememe
Help please (: :). .
Answer:37.68
Brainliest pls
Answer:
The circumference of the circle is 75.36cm
Step-by-step explanation:
There are two ways you can solve this, one is by using the radius and multiplying it by 2 and then pi which is 3.14, and the other is to use the diameter which is the radius times 2, and the thingy gave you the diameter, and you multiply it by 3.14 which is pi
What percent of the data is less than 10 texts?
Group of answer choices
25%
50%
75%
100%
I need help with this!!
If you work 11 hours per week and get paid 11.71 per hour how much do you get paid per month and per year
515 per month
6182 per year
AB= please answer :)
Answer:
8.77 or 8.80
Step-by-step explanation:
sin (20) = 3/x
x (sin)20)) = 3
divide by sin(20)
x= 8.77 or 8.8
Find the arc length of BC, use 3.14 for pi and round your answer to the nearest
tenth.
Answer:
31.4
Step-by-step explanation:
Find the missing height of a rectangular prism that has a volume of 137.5 inches with a width of 2.5 and length 10 in
Answer:
The answer would be 5.5
Step-by-step explanation:
To prove it, 10 x 2.5 x 5.5 would equal 137.5
I need 7 and 8 simplified
Answer:
7= 800 √5
8= √10/2
What is the answer for 2v-6/3-v ?
Step by step explanation:
2v−6
3-v
Factor the expressions that are not already factored.
2(v−3)
−v+3
Extract the negative sign in −3+v.
−2(−v+3)
−v+3
Cancel out −v+3 in both numerator and denominator.
−2
Answer:
-2
Find the value of x and y
Answer:
2x + 20 = 3x-10
2x -3x = -20-10
-x = -30
x= 30
Checking part:
2x+20 = 2(30) +20 = 60+20 = 80
3x-10 = 3(30) - 10 = 90-10 = 80
Hence, the final answer is x = 30.
Step-by-step explanation:
Answer:
30
Step-by-step explanation:
the angle should be the same so,
2x+20=3x-10
x=30
what do you mean find y? I can't see it
On simplifying (3+√3 )(5- √2), the value is
A. 112
B. 18
C. 6
D. 21
no spam and please explain ur answer .
Answer:
18
Step-by-step explanation:
( 3 + √3 ) ( 5 - √2 )
= 3 ( 5 - √2 ) + √3 ( 5 - √2 )
= 15 - 3√2 + 5√3 - √6
√2 = 1.41 ( approximately )
3√2
= 3 x 1.41
= 4.23
√6 = 2.44
√3 = 1.73
5√3
= 5 x 1.73
= 8.65
15 - 3√2 + 5√3 - √6
= 15 - 4.23 + 8.63 - 2.44
= 15 + 8.63 - 4.23 - 2.44
= 15 + 8.63 - 6.67
= 15 + 1.93
= 16.93
Rounding of 16.93 = 17
17 is near to 18.
So, 18 can be the answer.
If the measurement of angle 2 is 120 degrees, what is the measurement of angle 7?
Answer:
The measure of angle 7 is twice the measure of angle 2, then the measure of angle 7 is
angles 2 and 7 equal 180 degrees. 180 = 2x + x
180 = 3x
x = 60
angle 7 is twice x
angle 7 = 120
Step-by-step explanation: