Answer:
The value of the expression is 12 ⇒ B
Step-by-step explanation:
Let us solve the question
∵ The expression is 2n(n - 1)
→ Simplify it at first by multiply 2n by the bracket (n - 1)
∵ 2n(n - 1) = 2n(n) - 2n(1)
∴ 2n(n - 1) = 2n² - 2n
∵ n = 3
→ Substitute n by 3 in the expression to find its value
∴ 2n² - 2n = 2(3)² - 2(3)
∴ 2n² - 2n = 2(9) - 6
∴ 2n² - 2n = 18 - 6
∴ 2n² - 2n = 12 ⇒ at n = 3
∴ The value of the expression is 12
Helpppp thanks in advance
Answer:
Lets mark the unmarked angle as angle A and the base of the building as BC
We can use tan to find this
tan=opposite/adjacent
by knowing the 2 interior angles we can calculate the measure of A sicne the interior angles of any triangle add up to 180
52+90+A=180
142+a=180
38=a
tan(38)=BC/300
300 tan(38)=bc
using a calculator we see that bc=234.385689 or 234meters rounded
Step-by-step explanation:
Which tool could be used to model wave motion during a scientific investigation?
A: beam balance
B: mirror
C: prism
D: slinky spring
Answer:
D: slinky spring
Step-by-step explanation:
I NEED HELP ASAP!!!!!
What is the distance (length) of side LM?
Answer:
Distance, d = √((x2 - x1)² + (y2 - y1)²)
L(x1, y1) => L(-3, -1)
M(x2, y2) => M(2, 3)
Distance LM = √((2 - -3)² + (3 - -1)²)
= √((2 + 3)² + (3 + 1)²)
= √((5)² + (4)²)
= √(25 + 16)
= √ 41
= 6.4 unit
Jada and Lin are comparing inches and feet. Jada says that the constant of proportionality is 12. Lin says it is 1/12 Do you agree with either of them? Explain your reasoning.
Answer: Look up your exact question
Step-by-step explanation: The question you've asked has also been asked by another person on brainly, you could look at their answer. Link: https://brainly.com/question/11191408
Please help i only have today to finish this
Answer:
yes because the price is 5 time the number of boxs
Step-by-step explanation:
the last one
mark brainliest plz
hope I can help
A workers earnings e are a function of the number of hours n worked at a rate of 8.45 per hour
PLS HELP ASAP I DONT HAVE TIME AND IT ALSO DETECTS IF ITS RIGHT OR WRONG
please help!!!! its math I will give you more points if you answer correctly and brainly
The equations of four lines are given. Identify which lines are perpendicular.
Line 1: y+8x=−5
Line 2: x+1/6y=−5
Line 3: y=−6x−7
Line 4: y+3=1/8(x−1)
Lines 2 and 3 are perpendicular.
Lines 1 and 2 are perpendicular.
All four lines are perpendicular.
Lines 1 and 4 are perpendicular.
Answer:
All four lines are perpendicular
Step-by-step explanation:
Lines 1 and 2 are parallel
y+8x=−5;x+1/6y=−5
Lines 2 and 3 are parallel
x+1/6y=−5;y=−6x−7
Lines 1 and 4 are perpendicular they intercept
x+1/6y=−5;y+3=1/8(x−1)
All four lines are perpendicular
line 4 is perpendicular to all other lines
PLEASE HELP ME WITH THIS I REALLY NEED HELP PLEASE ASAP
Answer:
5. 120 pages in 1 day
6. 16 inches in 1 hour
Step-by-step explanation:
Just divide the numbers to get rate. 360/3=120 and 80/5=16
Answer:
5. 120 pages in 1 day
6. 16 inches in 1 hour
Step-by-step explanation
All you have to do is divide it
Given that f ( x ) = 3 x − 2 and g ( x ) = 2 x , evaluate f ( g ( − 1 ) )
g(x) = 2x
9(-1) = -2
f(x) = 3x-2
f(g(-1)) = f(-2) = 3*(-2) - 2 = -8
Answer:
-8
Step-by-step explanation:
g(-1)= 2 * -1 = -2
So f(g(-1)) will be f(-2)
F(-2) = (3 * -2) - 2
= -6 - 2
= -8
The ticket for the skating night costs $ 3.75 for those with a membership card and $ 5.00 for those without a membership card. The rental price of skates is $ 3.00.
The Moore family paid $ 6 more than the Cotter family to rent their skates. In total, the two families paid $ 30 to rent their skates.
How many pairs of skates did the Moore family rent?
Number of digits in base 5 number system are
Answer:
5 digits (from 0 to 4)
Step-by-step explanation:
Well the numbers that you can use to make a number are
[tex]0\\\\1\\\\2\\\\3\\\\4[/tex]
well there are 5 digits
Answer:
C
Step-by-step explanation:
HELP IM BEING TIMED!!!!!
Answer:
10
Step-by-step explanation:
Rad10 times rad10 equals rad100 which is simplified to 10
Answer:
A: 10
Step-by-step explanation:
√10 × √10
= 10
If the equation of a line is y = - 5x + 3, which is true?
A) Slope is 3, Y-Intercept is -5
B) Slope is -5 , Y- Intercept is 0
C) Slope is -5, Y-Intercept is 3
D) Slope is 5, Y-Intercept is -3
PLS ANSWER 64 POINTS (64 POINTS AND ILL MARK BRAINIEST) PLS...
Answer:
A
Step-by-step explanation:
Answer:
C
Step-by-step explanation:
So the formula for slope is y = mx + b
Here is what it looks like so far: y = -5x + 3
In that equation, -5 is m (slope)
and 3 is b (y-intercept)
So the answer is C
what is the x
0.02+0.7=0.8-0.3x
YESSIR HOOD MEALS FOR LIFE
Answer:
what's your questions ....
Answer:
MAN im finna make banger with this one Step-by-step explanation:
The width of a rectangle is 4 times its length, /. Which expressions represent the perimeter of the rectangle?
Answer:
[tex]P = 10l[/tex]
Step-by-step explanation:
Let [tex]w =[/tex] width of rectangle, [tex]l =[/tex] length of rectangle
[tex]P[/tex] = [tex]2l + 2w[/tex]
[tex]\because[/tex] [tex]w = 4[/tex]×[tex]l[/tex]
[tex]\therefore[/tex] [tex]P[/tex] = [tex]2l[/tex] + [tex]2(4l)[/tex]
= [tex]2l + 8l[/tex]
= [tex]10l[/tex]
Hope this helps :)
the equation is -2x² = 4-3 (x + 1) and the question is justify that it is a 2nd degree equation with the unknown x complete.
Answer:
Please check the explanation.
Step-by-step explanation:
Given the equation
-2x² = 4-3 (x + 1)
-2x² = 4-3x-3
-2x² = -3x -7
0 = 2x² -3x -7
We know that the degree of the equation is the highest power of x variable in the given equation.
In the equation 0 = 2x² -3x -7 the highest power of x variable in the given equation is 2.
Thus, the degree of the equation is 2.
Also in the equation 0 = 2x² -3x -7, the unknown variable is 'x'.
Let us determine the value 'x'
2x² -3x -7 = 0
Add 7 to both sides
[tex]2x^2-3x-7+7=0+7[/tex]
[tex]2x^2-3x=7[/tex]
Divide both sides by 2
[tex]\frac{2x^2-3x}{2}=\frac{7}{2}[/tex]
[tex]x^2-\frac{3x}{2}=\frac{7}{2}[/tex]
Add (-3/4)² to both sides
[tex]x^2-\frac{3x}{2}+\left(-\frac{3}{4}\right)^2=\frac{7}{2}+\left(-\frac{3}{4}\right)^2[/tex]
[tex]x^2-\frac{3x}{2}+\left(-\frac{3}{4}\right)^2=\frac{65}{16}[/tex]
[tex]\left(x-\frac{3}{4}\right)^2=\frac{65}{16}[/tex]
[tex]\mathrm{For\:}f^2\left(x\right)=a\mathrm{\:the\:solutions\:are\:}f\left(x\right)=\sqrt{a},\:-\sqrt{a}[/tex]
solving
[tex]x-\frac{3}{4}=\sqrt{\frac{65}{16}}[/tex]
[tex]x-\frac{3}{4}=\frac{\sqrt{65}}{\sqrt{16}}[/tex]
[tex]x-\frac{3}{4}=\frac{\sqrt{65}}{4}[/tex]
Add 3/4 to both sides
[tex]x-\frac{3}{4}+\frac{3}{4}=\frac{\sqrt{65}}{4}+\frac{3}{4}[/tex]
[tex]x=\frac{\sqrt{65}+3}{4}[/tex]
similarly solving
[tex]x-\frac{3}{4}=-\sqrt{\frac{65}{16}}[/tex]
[tex]x=\frac{-\sqrt{65}+3}{4}[/tex]
So the solution of the equation will have the values of x such as:
[tex]x=\frac{\sqrt{65}+3}{4},\:x=\frac{-\sqrt{65}+3}{4}[/tex]
i just need the straight up answer lolol
Use a graph to find x and y values that make both
y = x + 3 and y = 2x – 5 true.
YA
6
5 4
NW
-8 7 6 5 4 3 -2 -10
NE
4
6 7 8 x
-2
-3
The x-value is
The y-value is
The solution is
Step-by-step explanation:
The given equations are :
y = x + 3 .....(1)
y = 2x – 5 ......(2)
The table for equation (1) is :
x = 0, 1, 2, 8
y = 3, 4, 5, 11
The table for equation (2) is :
x = 0, 1 , 2, 8
y = -5, -3, -1, 11
From the graph we can see that,
The x-value is = 8
The y-value = 11
The solution is = (8,11).
The x-value is = 8, the y-value = 11 and the solution is = (8,11)
How to determine the equation solutions?The equations are given as:
y = x + 3
y = 2x - 5
Next, we plot the graph of the equations
From the graph of the equations, we have:
(x,y) = (8, 11)
Hence, the x-value is = 8 and the y-value = 11
So, the solution is = (8,11)
Read more about graphed equations at:
https://brainly.com/question/14323743
Avery paid an electrician x dollars per hour for a 4-hour job and $85 for parts. The total charge was $305. Which equation can be used to determine how much the electrician charged per hour
Answer:
it is a good luck hope i helped
Write the equation in standard form.
y-4 = –3/5 (x + 10)
Answer:
-4y+10x= -3/5
Step-by-step explanation:
Hopeful this helps
Factorise x³+7x²-2x-14
Answer:
(x+7)(x^2+2)
Step-by-step explanation:
Pls help with both...........
Answer:
1000
512 is ans ...............
I am super bad with graphs
this is my answer I hope its right I havent done graphs in a hot second
solve 2x+2y-3 ASAP PLS HLP WILL MARK AS BRAINLIEST
Answer:
xy9
Step-by-step explanation:
JEFF WANTS TO MAKEB3 BIRDHOUSES FOR EACH HOUSE HE NEEDS 3 3/4 FEET OF WOOD HOW MUCH WOOD DOES JEFF NEED TO MAKE ALL 4 BIRDHOUSES
Answer :15 pieces of wood
plz mark brainliest
hope i can help
Use the graph below to identify the following key features.
1. Minimum
2. x-intercept(s)
3. y-intercept:
Answer:
(-4,-4)min, x-intercepts (-2,0) (-6,0), y-intercept (0,2)
Please answer ASAP
If two sides of a triangle have lengths x+1 and x+5, what values would the third side of the triangle have to be?
Answer:
Whats a you love
Step-by-step explanation:
no entiendo
Suppose that Dave's checking account shows a balance of $725,35 at the beginning of the month. During this month, he makes deposits of
$300.00 $472.25, $187.50, and $175,35, and he writes checks for $307.50, $237.60, $125.00, and $327.00. Find the end of the month balance
in his account
Answer:
the answer should be 932.65