Solving quadratic equations solve: x^2=81
Answer:9
Step-by-step explanation:
Square root of 81 is9.
evaluate the expression (-20)-17=
How many solutions does the system have?
- 2x - 4
y = 3x + 3
Choose 1 answer:
A
Exactly one solution
B
No solutions
С
Infinitely many solutions
leyes logicas de la matematica
Step-by-step explanation:
Leyes conmutativas. ...
- Leyes asociativas. ...
- Leyes distributivas. ...
- Leyes de idempotencia. ...
- Leyes de Morgan.
Explain which line must be parallel pllleeeaaaasser hurryyyy
Answer:
Lines P and Q
Answer:
parallel lines are lines that are directly next to each other so i think line's
p and q
Step-by-step explanation:
please mark me the brainliest if i am right
A park is rectangular with a length of 1/2 miles. If the area of the park is 6/8 square miles, what is its width? Input your answer as a fraction.
giving 40 points! please help soon <33
Step-by-step explanation:
Area of Park = Length * Width
Therefore Width = Area / Length
= (6/8) / (1/2) = (6/8) * (2/1) = 3/2 miles.
Answer:Area of Park = Length * Width
Therefore Width = Area / Length
= (6/8) / (1/2) = (6/8) * (2/1) = 3/2 miles.
Step-by-step explanation:
A tennis racket that cost $79 is now on sale for $83. What is the
percent of change?
Answer:
5.06%
or
5.06329114%
Step-by-step explanation:
The increase if $4.
4/79 = 0.0506329114, which is 5.06%
What is the value of the expression when x = 5? 3x^2 + 14 - 10x
Answer: 39
Step-by-step explanation:
A line passes through the points (4,8) and (2,0). What is its equation in slope-intercept
form?
Answer:
The answer is y = 4x - 8.
Step-by-step explanation:
☆Remember: [tex]m = \frac{y_2 - y_1}{x_2 - x_1} [/tex]
☆Slope-intercept: [tex]y = mx + b[/tex]
---
☆We need to find the slope first. So just plug in according to the slope formula!
[tex]m = \frac{0 - 8}{2 - 4} = \frac{ - 8}{ - 2} = 4[/tex]
---
☆Now we need to find the y-intercept. We are going to plug in the slope and a set of coordinates to find the y-intercept.
[tex]y = mx + b \\ 8 = 4(4) + b \\ 8 = 16 + b \\ \frac{ - 16 = - 16 \: \: \: \: \: \: \: \: \: \: \: \: }{ - 8 = b \: \: \: \: \: \: \: \: \: \: \: \: \: \: } [/tex]
---
☆Now all we need to do is plug in and we are done!
[tex]y = 4x - 8[/tex]
▪Happy To Help <3
Work out the diffeence beteeen 77.5 and 2.27
what if the answer????
formula for perimeter of a square
Answer:
Let the side of the square be x
Then the perimeter of the square is 4×(side)=4x
Find the missing side length
Answer:
7 ft
Step-by-step explanation:
16-9=7
Solve for w.
-9 – 7W = -9 – 8w
Answer:
Step-by-step explanation - w= o
Find the common difference in the arithmetic sequence, an, in which a3=11 and a12=74.
Answer:
d=7
Step-by-step explanation:
Find the x- and y-intercepts of the linear function.
-8 - 2x + 4y = 0
Answer: x-2y=-4
Step-by-step explanation:
Move the constant to the righthand side and change its sign (-2x=4y+8)Change the signs on both sides of the equation (x-2y=-4)Divide both sides of the equation by 2 (-x+2y=4)Solution: x-2y=-4what is the qoutient -3 ÷ 9?
Answer:
0.25
Step-by-step explanation:
Alyssa drive 10 miles in 20 minutes if she drove one hour in total at the same rate how far did she go
Answer:
30 miles
Step-by-step explanation:
60 ÷ 20 = 3
10 × 3 = 30
Translate the given phrase into an algebraic expression and simplify if possible: the sum of -8 and -9, increased by 23.
Note: Enter only the simplified result.
Step-by-step explanation:
(-8-9)+23
-17+23
6.........
The value of algebraic expression [(-8) + ( -9)] + 23 is 6.
Here,
We have to simplify; the sum of -8 and -9, increased by 23.
And, find an algebraic expression.
What is Algebraic expression?
An algebraic expression in mathematics is an expression which is made up of variables and constants, along with algebraic operations.
Now,
The written expression is, the sum of -8 and -9, increased by 23.
It can be written as,
⇒ [(-8) + ( -9)] + 23
⇒ - 8 - 9 + 23
⇒ - 17 + 23
⇒ 6
Hence, The value of algebraic expression [(-8) + ( -9)] + 23 is 6.
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April pays a dog-walking service $30 each week to walk her dog. Let w = the number of weeks. Let d = the number of dollars April pays the service. Part A Which equation represents the problem? A. d = w + 30 B. w = d × 30 C. w = 30 + d D. d = w × 30 Part B Drag numbers to complete the table to show the number of dollars, d, that April spends on dog-walking in w weeks. Numbers may be used once, more than once, or not at all. 61803460150200 w 1 2 5 d 30 90 120
Answer:
Rule + 30, Equation: w=d+30
Step-by-step explanation:
Hope this will help some of you!
The amount in dollar for w weeks be d= 30 x w.
what is Algebra?A branch of mathematics known as algebra deals with symbols and the mathematical operations performed on them.
Variables are the name given to these symbols because they lack set values.
In order to determine the values, these symbols are also subjected to various addition, subtraction, multiplication, and division arithmetic operations.
Given:
Let w = the number of weeks.
Let d = the number of dollars April pays the service.
April pays a dog-walking service $30 each week to walk her dog.
So, the equation represents the situation
d= 30 x w
Hence, the amount in dollar for w weeks be d= 30 x w.
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The rectangle below has an area of x^2
-114square meters and a length of x+12metters
Given that,
The area of the rectangle, [tex]A=x^2-114[/tex]
Length of the rectangle, [tex]l=x+12\ m[/tex]
To find,
The width of the rectangle.
Solution,
The formula for the area of a rectangle is given by :
A = lb
b is width of the rectangle
[tex]b=\dfrac{A}{l}\\\\b=\dfrac{x^2-114}{x+12}\\\\b=\dfrac{x^2-12^2}{x+12}\\\\b=\dfrac{(x-12)(x+12)}{(x+12)}\\\\=(x-12)\ m[/tex]
So, the width of the rectangle is (x-12) m.
A cirdie is divided up into 24 equal pieces. What percentage of the total circle area will each piece be? Round to the nearest
percent
A 2%
B. 8%
C 7%
D4%
Answer:
4 %
Step-by-step explanation:
100/24=25/6=4 1/6
What is the value of of x,a,b and c?
Answer:
a= 98 b= 82 c= 98 is the answer .....
The equation of a circle is A is x^2
Answer: ??
Step-by-step explanation:
This might help :/
Area of a circle = pie r^
Circumference = 2pie r
1800 yards per hour is the same rate as which of the following?
A. ____ yards per second B. _____ yards per minute
Answer:
a............ you are welcome
Explain how to solve X/3 < -2
Please and thank you!
Combine like terms in each expression
1. 1/4k+1/4m-2/3k+5/9m
2. -4b + 2w + (-4b) + 8w
3. 6- 5z + 8 - 4z + 1
Answer:
5/12k = 29/36m
8b = 10w
9z = 15
Step-by-step explanation:
Combining the like terms in these sets of equations is quite easy and straightforward. All we do is carry the like terms to either of the side of the equation, and question is solved. As in below
1/4k + 1/4m - 2/3k + 5/9m =
1/4k - 2/3k + 1/4m + 5/9m = 0
-5/12k + 29/36m = 0
5/12k = 29/36m
-4b + 2w + (-4b) + 8w =
-4b - 4b + 2w + 8w = 0
-8b + 10w = 0
8b = 10w
6- 5z + 8 - 4z + 1 =
6 + 8 + 1 - 5z - 4z = 0
15 - 9z = 0
9z = 15
What is the equation, in point-slope form, of the line
that is parallel to the given line and passes through the
point (4, 1)?
Answer:
Step-by-step explanation:
Given:
The line parallel to the given line containing the points (-3,3) and (-2,1).
Also, the parallel line passes through the point (4,1).
We need to determine the equation of the line in slope - intercept form.
Slope:
Since, the two lines are parallel, then their slopes are equal.
Thus, the slope of the parallel line can be determined using the formula,
Substituting the points (-3,3) and (-2,1), we get;
Thus, the slope of the line is
Equation of the line:
The equation of the line can be determined using the formula,
Since, the line passes through the point (4,1), let us substitute the point (4,1) in the above formula, we have;
Thus, the equation of the line is
Hence, y − 1 = −2(x − 4) is the correct answer.
:)
Find the mean of the ending balance in Teresa’s account for the week.
A 2-column table with 8 rows titled Daily Ending Balance. Column 1 has entries 1, 2, 3, 4, 5, 6, 7, total. Column 2 has entries 320 dollars, 206 dollars, 245 dollars, negative 2 dollars, negative 2 dollars, 18 dollars, 20 dollars, 805 dollars.
Total balance
Number of days
= 805
7
Mean (Average) =
Answer:
$115
Step-by-step explanation:
805 divide it by 7 you get 115 also got right guys trusted me ( >-< )
Answer:
yep! 115$ is correct! :)
What are all values of x for which the function f defined by f(x)=x3+3x2−9x+7 is increasing ?
(A) −3
(B) −1
(C) x<−3 or x>1
(D) x<−1 or x>3
(E) All real numbers.
Answer:
C. [tex]x < -3[/tex] or [tex]x > 1[/tex].
Step-by-step explanation:
Let [tex]f(x) = x^{3}+3\cdot x^{2}-9\cdot x +7[/tex], the first derivate of the function is:
[tex]f'(x) = 3\cdot x^{2}+6\cdot x -9[/tex] (1)
By the Quadratic Formula, we determine the roots of this polynomial:
[tex]x_{1} = 1[/tex], [tex]x_{2} = -3[/tex]
And the factorized form of the polynomial is:
[tex](x-1)\cdot (x+3) > 0[/tex]
By law of Signs, the polynomial is increasing when [tex]x-1 > 0[/tex] and [tex]x +3 > 0[/tex] or [tex]x-1 < 0[/tex] and [tex]x+3 < 0[/tex], which means that:
[tex]x < -3[/tex] or [tex]x > 1[/tex]
Therefore, the right answer is C.
Answer:
The correct option is an option (c).
Given:
The given function is,
[tex]f(x)=x^{3}+3x^{2}-9x+7[/tex]
Computation:
The function is increasing when [tex]f'(x)>0[/tex].
Now, differentiating the given function with respect to [tex]x[/tex] up to first order we get,
[tex]f'(x)=3x^{2}+3(2x)-9(1)+0\\f'(x)=3x^{2}+6x-9\\=3(x^{2}+2x-3)\\=3(x(x+3)-1(x+3))\\=3(x+3)(x-1)[/tex]
So, the sign function is,
Therefore, [tex]f'(x)>0[/tex] when [tex]x\in (-\infty ,-3)\cup (1,\infty )[/tex]
So, [tex]f(x)[/tex] is increasing on [tex]x<-3[/tex] or [tex]x>1[/tex]
Hence, the correct option is an option (c).
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Alicia records the total number of points scored in two games by 10 players on her basketball team.
28, 13, 4, 8, 15, 10, 22, 7, 11, 15
Which box plot represents the data
Answer:
Your answer would be D It makes much more sense than the others
Step-by-step explanation:
good luck :)
Answer:
First option at second row , Option( C )
Step-by-step explanation:
In order to solve the problem,
First we need to arrange the numbers in ascending order.
4 , 7 , 8 , 10 , 11 , 13 , 15 , 15 , 22 , 28
Median = [tex]\frac{11 + 13}{2}[/tex]
= 12
From the first range ( 4,7,8,10,11 ) , we can find Q1 also known as first quartile where Q1 = 8 ( middle-most number).
Similarly, from the second range ( 13,15,15,22,28 ) , we can find Q2 also known as third quartile where Q3 = 15 (middle-most number ).
Now, for the box plot,
We need to draw a number line from 0 to 32.
Next, we need to draw a box from Q1 to Q3 with a vertical line through the median.
Next, we put dots above 4 and 28 since our numbers start from 4 and end with 28.
Finally we join the dots and the box plot with a straight line.
Hence, option C is the correct choice.
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