Answer:
1 / 5
Step-by-step explanation:
a = 2 - 9a
a + 9a = 2
10a = 2
a = 2 / 10
a = 1 / 5
A piano has a length of 8 feet and a width of x+2 feet, write an expression in simplest form of the perimeter of the piano.
Answer: 2(x + 10)
Step-by-step explanation: you have to add all of the perimeter sides together so you will have to times the length by 2 so your equation would be (8 × 2 = 16). Then the width by 2 ( 2 × (x+2) = 2x + 4) now you add them together
16 + 2x + 4
2x + 20
Now you have to take out the highest common factor which is 2
So it will be 2(x + 10)
Simplify (−8.5)(−5)( −2). (1 point)
Select one:
a.
850
b.
85
c.
−85
d.
−850
Answer:
C). -85 is correct answer
Step-by-step explanation:
This is a multiplication problem, so we can just multiply from left to right:
-8.5 x -5 = 42.5
42.5 x -2 = -85 (negative 85)
(Hope this helps can I pls have brainlist (crown)☺️)
s = bc -5, for b whats the answer?
is the equation 2x+y=4 and 2x^2+y=6 linear.. if so, how do i graph them?
Answer:
No, but you can graph them by converting to mx+b form
Step-by-step explanation:
The procedure for solving simultaneous linear equations now called Gaussian elimination appears in the ancient Chinese mathematical text Chapter Eight: Rectangular Arrays of The Nine Chapters on the Mathematical Art. Its use is illustrated in eighteen problems, with two to five equations.[4]
Systems of linear equations arose in Europe with the introduction in 1637 by René Descartes of coordinates in geometry. In fact, in this new geometry, now called Cartesian geometry, lines and planes are represented by linear equations, and computing their intersections amounts to solving systems of linear equations.
The first systematic methods for solving linear systems used determinants, first considered by Leibniz in 1693. In 1750, Gabriel Cramer used them for giving explicit solutions of linear systems, now called Cramer's rule. Later, Gauss further described the method of elimination, which was initially listed as an advancement in geodesy.[5]
In 1844 Hermann Grassmann published his "Theory of Extension" which included foundational new topics of what is today called linear algebra. In 1848, James Joseph Sylvester introduced the term matrix, which is Latin for womb.
Linear algebra grew with ideas noted in the complex plane. For instance, two numbers w and z in {\displaystyle \mathbb {C} }\mathbb {C} have a difference w – z, and the line segments {\displaystyle {\overline {wz}}}{\displaystyle {\overline {wz}}} and {\displaystyle {\overline {0(w-z)}}}{\displaystyle {\overline {0(w-z)}}} are of the same length and direction. The segments are equipollent. The four-dimensional system {\displaystyle \mathbb {H} }\mathbb {H} of quaternions was started in 1843. The term vector was introduced as v = x i + y j + z k representing a point in space. The quaternion difference p – q also produces a segment equipollent to {\displaystyle {\overline {pq}}.}{\displaystyle {\overline {pq}}.} Other hypercomplex number systems also used the idea of a linear space with a basis.
Arthur Cayley introduced matrix multiplication and the inverse matrix in 1856, making possible the general linear group. The mechanism of group representation became available for describing complex and hypercomplex numbers. Crucially, Cayley used a single letter to denote a matrix, thus treating a matrix as an aggregate object. He also realized the connection between matrices and determinants, and wrote "There would be many things to say about this theory of matrices which should, it seems to me, precede the theory of determinants".[5]
Benjamin Peirce published his Linear Associative Algebra (1872), and his son Charles Sanders Peirce extended the work later.[6]
The telegraph required an explanatory system, and the 1873 publication of A Treatise on Electricity and Magnetism instituted a field theory of forces and required differential geometry for expression. Linear algebra is flat differential geometry and serves in tangent spaces to manifolds. Electromagnetic symmetries of spacetime are expressed by the Lorentz transformations, and much of the history of linear algebra is the history of Lorentz transformations.
The first modern and more precise definition of a vector space was introduced by Peano in 1888;[5] by 1900, a theory of linear transformations of finite-dimensional vector spaces had emerged. Linear algebra took its modern form in the first half of the twentieth century, when many ideas and methods of previous centuries were generalized as abstract algebra. The development of computers led to increased research in efficient algorithms for Gaussian elimination and matrix decompositions, and linear algebra became an essential tool for modelling and simulations.[5]
Vector spaces
Main article: Vector space
Until the 19th century, linear algebra was introduced through systems of linear equations and matrices. In modern mathematics, the presentation through vector spaces is generally preferred, since it is more synthetic, more general (not limited to the finite-dimensional case), and conceptually simpler, although more abstract.
A vector space over a field F (often the field of the real numbers) is a set V equipped with two binary operations satisfying the following axioms. Elements of V are called vectors, and elements of F are called scalars. The first operation, vector addition, takes any two vectors v and w and outputs a third vector v + w. The second operation, scalar multiplication, takes any scalar a and any vector v and outputs a new vector av. The axioms that addition and scalar multiplication must satisfy are the following. (In the list below, u, v and w are arbitrary elements of V, and a and b are arbitrary scalars in the field F.)[7]
76.6, 25.5 and 10.87 estimated sum and actual sum?
estimated sum-114, actual sum-112.97
Step-by-step explanation:
76.6-77
25.5-26
10.87-11
77+26+11=114
76.6+25.5+10.87=112.97
what times 3 equals 0.5?
[tex](x)3=0.5[/tex]
Answer:
.16666667
Step-by-step explanation:
(x)3=0.5
divide both sides by 3
x =.16666667
Help meeeeeeeee plsss
Answer:
Continuous
Step-by-step explanation:
Solve F=D+Drt for t.....
Answer:
[tex]t = \frac{-D+F}{Dr}[/tex]
Step-by-step explanation:
Step 1: Flip the equation.
[tex]Drt + D = F[/tex]Step 2: Subtract D from both sides.
[tex]Drt + D - D = F - D[/tex] [tex]Drt = -D + F[/tex]Step 3: Divide both sides by Dr.
[tex]\frac{Drt}{Dr} = \frac{-D+F}{Dr}[/tex] [tex]t = \frac{-D+F}{Dr}[/tex]Help me plz! I WILL MARK YOU BRAINLYST
Answer:
6.5 rounded from 6.53...
to see if this is correct we can:
13.5+9.5+6.5*3 = 42.5
but since we rounded it we can say its 6.5
Answer:
6.55 meters each day
Step-by-step explanation:
You know that in the end the fence must be 42.6 meters long.
On Monday & Tuesday, he installed 22.95 meters of fence. (We know this because 13.45 + 9.5 = 22.95).
So, how much is left? You find that by subtracting 22.95 from 42.6.
42.6-22.95 = 19.65 meters
There are 3 days left of fencing, and these days he will install equal lengths, so you can divide 19.65 meters by 3 days.
19.65 / 3 = 6.55 meters of fence per day
I forget how to do this lol
Answer:
-0.83
Step-by-step explanation:
Please help
Given m∠LMN=145 what is ∠XMN?
Answer:
(4x+5)°+(6x-10)°=145°
4x+6x+5-10=145°
10x-5=145°
10x=145+5
10x=150°
x=15
(6x-10)°=(6×15-10)°
=80°
The value of ∠XMN = 80.
What is angle?An angle is a figure in plane geometry that is created by two rays or lines that have a shared endpoint.
The value of total ∠LMN = 145.
∠LMN = ∠LMX +∠XMN
145 = (4x + 5) + (6x - 10)
145 = 4x + 5 + 6x - 10
145 = 10x -5
10x = 150
x = 15
Substitute the value of x in ∠XMN = (6x - 10)
∠XMN = 6×15 - 10
= 90 - 10
∠XMN = 80
Therefore, the value of the angle ∠XMN = 80.
To know more about the angle theorems, here
https://brainly.com/question/27962469
#SPJ2
Solve for X
A) -6
C) 12
E) 9
B) 8
D) 3
Answer:
In my thinking the answer is 9.
An engineer earns $108 000 annually. Deductions
of $3 975 are made each month.
Calculate:
(a) his gross monthly salary
(b) his net monthly salary
Answer:
9,000
5,025
Step-by-step explanation:
-2 1/2 ÷6=
-5 5/8 ÷ 5=
-2 1/8 ÷ 1/4=
1 5/8 ÷ -1 3/5=
-4 1/3 ÷ -2 3/5=
Answer:
-2 1/2 ÷ 6 = -0.41
-5 5/8 ÷ 5 = -1.12
-2 1/8 ÷ -1/4 = -8.5
1 5/8 ÷ -1 3/5 = -1.01
-4 1/3 ÷ -2 3/5 = 1.66
, Hope this helps :)
Have a great day!!
Please help
Consider the matrices.
_ _
| - 17 |
PQ = | - 3 |
| - 37 |
|_ 49 _|
There are a total of 84 campers attending a summer camp. The ratio of boys to girls is 4 to 3.
How many girls are attending the summer camp?
Enter your answer in the box.
Please help me! Please please please help me!
please help!! i will give a thanks and brainliest !
Answer:
19. is 18
31. is 10y-x
Step-by-step explanation:
thats only what i know sorry
what is the measure of F?
pleaseeee
Answer:
D
Step-by-step explanation:
The 3 angles in a triangle sum to 180°
Sum the 3 given angles and equate to 180
2x + 3 + 7x - 5 + 3x + 14 = 180 , collect like terms
12x + 12 = 180 ( subtract 12 from both sides )
12x = 168 ( divide both sides by 12 )
x = 14
Then
∠ F = 7x - 5 = 7(14) - 5 = 98 - 5 = 93° → D
Some save me please will name brainliest if the answer is correct
Answer:
-5, -9
Step-by-step explanation:
This point is located in the fourth quadrant. When rotated at 270 degrees, it'll end up in the third quadrant. The rules for this quadrant is that both the x and y value will be negative.
Answer: I think is -9(5,)
Step-by-step explanation:
At a farm the ratio of cows to horses was 9: 2 if there were 72 cows at the farm how many horses were there
Answer:
16 Horses!
Step-by-step explanation:
Since
9 : 2 = 72 : X
Then we know
2/9 = X/72
Multiplying both sides by 72 cancels on the right
72 × (2/9) = (X/72) × 72
72 × (2/9) = X
Then solving for X
X = 72 × (2/9)
X = 16
Therefore
9 : 2 = 72 : 16
Which graph represents a proportional relationship from y to x with a constant of proportionality of 1/2
Answer:
It´s going to be B
Step-by-step explanation:
Priya collected 2,400 grams of pennies in a fundraiser. Each penny has a mass of 2.5 grams. How much money did priya raise?
Answer:
$960
Step-by-step explanation:
2,400 divided by 2.5 = 960
y divided by x = 950 (x) 2,400 (y)
PLEASE HELP WILL MARK BRAINLIEST!
CAN ANYONE PLZ HELP ME WITH THIS WORKSHEET .. I’ll mark as brainliest
Answer:
Step-by-step explanation:
1)
We know that if [tex]x^2=9[/tex], then [tex]x=\pm \sqrt{9}[/tex], so [tex]\boxed{x=3,-3}[/tex]
2)
We know that if [tex]x^3=8[/tex], then [tex]x=\sqrt[3]{8}[/tex], so [tex]\boxed{x=2}[/tex]
3)
[tex]x^3=\frac{1}{8}[/tex] means that [tex]x=\sqrt[3]{\frac{1}{8}}=\frac{\sqrt[3]{1}}{\sqrt[3]{8}}=\frac{1}{2}[/tex].
So, [tex]\boxed{x=\frac{1}{2}}[/tex].
4)
[tex]x^3=27[/tex] means that [tex]x=\sqrt[3]{27}=\sqrt[3]{3^3}=3[/tex].
So, [tex]\boxed{x=3}[/tex].
5)
[tex]x^2=25[/tex] means that [tex]x=\pm \sqrt{25}=\pm \sqrt{5^2}=\pm 5[/tex].
So, [tex]x=5,-5[/tex].
6)
We know that the side length of the square will be [tex]\sqrt{\frac{9}{16}}=\frac{\sqrt{9}}{\sqrt{16}}=\boxed{\frac{3}{4}}[/tex].
7)
[tex]6x^2=54[/tex] means that [tex]x^2=9[/tex], which means that [tex]\boxed{x=3,-3}[/tex].
8)
[tex]2x^2+25=75[/tex] means that [tex]2x^2=50[/tex], which means that [tex]x^2=25[/tex], which means that [tex]\boxed{x=5,-5}[/tex]
Use the distributive property to rewrite each expression. then evulate. 27.) -3(2x-6)
Answer: -6x + 18
Step-by-step explanation: multiply each expression in the brackets by -3
so, -3 x 2x = -6x and -3 x -6 will give you +18 or just 18
for a final answer of -6x + 18
thoả mãn x biết 2(x+5)=x^2+5x
Answer:
= 2
= − 5
Step-by-step explanation:
fkhjglirugaeuzikjbvea HELP
Step-by-step explanation: Isolate the variable by dividing each side by factors that don't contain the variable.
Simplify the expression
√4x^2/3y
PLEASE SHOW WORK!!
Answer:
[tex] \frac{2 \sqrt{3y} \times |x| }{3y} [/tex]
Step-by-step explanation:
[tex] \sqrt{ \frac{ {4x}^{2} }{3y} } [/tex]
[tex] \frac{2 \times |x| }{ \sqrt{3y} } \\ \frac{2 \times |x|}{ \sqrt{3y} } \times \frac{ \sqrt{3y} }{ \sqrt{3y} } \\ \frac{2 \times |x| \times \sqrt{3y} }{ \sqrt{3y} \sqrt{3y} } [/tex]
[tex] \boxed{Answer:{\boxed{\green{= \frac{2 \sqrt{3y} \times |x| }{3y}}}}} [/tex]
graph the line that passes through the point (0, -3) and is perpendicular to another line whose slope is 2
Answer:
y = -1/2x -3
Step-by-step explanation:
The line perpendicular to one with a slope of 2 will have a slope that is the negative reciprocal of 2, that is, -1/2. The given point is the y-intercept of the required line, so we can write its equation directly in slope-intercept form:
y = mx + b
where m is the slope (-1/2), and b is the y-intercept (-3). Your line is ...
y = -1/2x -3