Answers
Answer:
(x - 9)(x + 9)
Step-by-step explanation:
x² - 81 ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b), then
x² - 81
= x² - 9²
= (x - 9)(x + 9)
Related Questions
solve for y. will give brainiest
Answers
Answer:
y = 81°
Step-by-step explanation:
let the 5 th angle in the pentagon be x
The sum of the interior angles of a polygon is
sum = 180° (n - 2) ← n is the number of sides
Here n = 5, then
sum = 180° × 3 = 540°
sum the angles and equate to 540
x + 95 + 125 + 116 + 105 = 540
x + 441 = 540 ( subtract 441 from 540 )
x = 99°
x and y are adjacent angles and supplementary, sum to 180° , that is
x + y = 180°
99° + y = 180° ( subtract 99° from both sides )
y = 81°
water tank holds 711 gallons but is leaking at a rate of 4 gallons per week. second water tank holds
948 gallons but is leaking at a rate of 7 gallons per week. After how many weeks will the amount of water
in the two tanks be the same?
Answers
948-7*79=395
711-4*79=395
Natasha, Peter and Malachy share £56 in a ratio 1:1:2. How much money does each person get?
Natasha:
£
Peter:
£
Malachy:
£
Answers
Answer:
Natasha £14
Peter £14
Malachy £28
Step-by-step explanation:
Add 1+1+2=4
56/4=14
Multiple each ratio by 14 check by adding up and see if its the beginning total figure!
So can someone just help me solve this and tell me which terms belong together....ty-
Answers
Which expression equals sixty? 6 × (3 + 7) 6 × 3 + 7 6 + 7 × 3 19 - (5 + 5) × 7
Answers
______________________________
1.) Solve each expression:a.) [tex]6[/tex] × [tex](3+7)=60[/tex]
b.) [tex]6[/tex] × [tex]3+7=25[/tex]
c.) [tex]6+7[/tex] × [tex]3=27[/tex]
d.) [tex]19-(5+5)[/tex] × [tex]7=-51[/tex]
______________________________
Why can you remove you can remove an x-tile from each side of the mat?
Answers
Need help please!! I’m confused
Answers
Answer:
y = -0.2x + 3.8
Step-by-step explanation:
it states it has been 7 weeks. 0.2 x 7 is 1.4. That means they started with 2.4 + 1.4 meters thick of ice sheet, which is 3.8, which is the number they started with. So, b = 3.8 and it says it melts 0.2 so it's a negative, which is -0.2 as slope. So, y = -0.2x + 3.8
Adam is buying some granola bars from the store. He finds a box of 6 Brain Grains granola bars for $4.74 and a box of 10 Nutty Crunch bars for $7.80. Which brand is the better value?
Answers
Answer: Nutty Crunch bars
Step-by-step explanation:
A box of 6 Brain Grains granola bars costs $4.74. The cost for one will be:
= $4.74 / 6
= $0.79
A box of 10 Nutty Crunch bars cost $7.80. The price per one will be:
= $7.80/10
= $0.78
The brand with the better value is Nutty Crunch bars
2^46 is how many times as many as 2^42?
Answers
Answer:
16 times as many
Step-by-step explanation:
2^46 = 70368744177664 2^42 = 4398046511104 70368744177664/4398046511104 = 16
Graph the image of the figure after a dilation with a scale factor of 3 centered at (2, −7).
Use the Polygon tool to graph the quadrilateral by connecting all its vertices.
Here is a link to another brainly question that has the picture of my problem I just need a good answer for it and QUICK! 30 points https://brainly.com/question/12339482?exp=25-1
Answers
Answer:
Step-by-step explanation:
Point (-7,-2) is the center of dilation. The scale factor is 2.
If point A has coordinates (-3,-2), then its image point H has coordinates (1,-2).
If point B has coordinates (-6,2), then its image point E has coordinates (-5,6).
If point C has coordinates (-4,3), then its image point F has coordinates (-1,8).
If point D has coordinates (-1,1), then its image point G has coordinates (5,4).
El 1% de las videocámaras vendidas por la Phil´s Photo Shop, tiene un defecto en su estuche. Se seleccionan al azar cuatro estuches de lo vendido recientemente. Encuentre la probabilidad de que exactamente uno esté defectuoso
Answers
9514 1404 393
Answer:
3.88%
Step-by-step explanation:
The probability that 1 is defective and 3 are not (out of four) is ...
P(1 of 4) = 4(0.01)(0.99)^3 ≈ 0.0388 = 3.88%
__
The multiplier of 4 comes from the number of ways that 1 can be chosen from 4.
how do you solve this using the substitution method?
Answers
Answer:
x=13, y=36
Step-by-step explanation:
y−2x=10
6x−2y=6 −2x+y=10
6x−2y=6
6x=2y+6
x= 1/6(2y+6)
x=1/3y+1
-2(1/3y+1)+y=10
-2/3y-2+y=10
1/3y=12
y=36
Substitute y to check your answer
x=1/3*36+1
x=12+1
x=13
And to go further if you wish to check your answer you can substitute x
There are 13 girls on Janelle's soccer team. Uniforms cost $32 each. Which equation uses estimation correctly to show about how much money the team spent?
Answers
Answer:
$416
Step-by-step explanation:
From the above question,
Total number did people in a team = 13 girls
Uniform of each member of team = $32
The amount of money the team spent can be calculated as:
$32 × x
Where x = Number of people on the team = 13
The amount spent = $32 × 13
= $416
The amount the team spent is $416
What is the slope of the line that passes through the points (-3, 4) and (5, -2)?
Answers
Answer:
m = 0 , this is a horizontal line, y = 5
Step-by-step explanation:
Find the slope of the line that passes through the pair of points
(-3,5),
(-4,5) m = 0/1 = 0
m=y2-y1/x2-x1
m = 0 , this is a horizontal line, y = 5
Hopefully that helps!!!!!
I need help putting this into simplest form.
Answers
Answer:
1/x^2-2x-8
Step-by-step explanation:
please help me i need to turn in assignment!!!!! i will mark the answer brainliest. plz be descriptive!!!
Answers
Answer: D. 150
Step-by-step explanation:
Given equation: [tex]3(3x-10)=5(x+10)[/tex] , it shows the relationship between the perimeter of an equilateral triangle and the perimeter of an equilateral triangle.
Consider [tex]3(3x-10)=5(x+10)[/tex]
[tex]\Rightarrow\ 9x-30=5x+50\\\\\Rightarrow\ 9x-5x= 50+30\\\\\Rightarrow\ 4x= 80\\\\\Rightarrow\ x=\dfrac{80}{4}\\\\\Rightarrow\ x= 20[/tex]
Now, perimeter of pentagon = 5(x+10) = 5 (20+10)
= 5(30) = 150
Hence, option D is correct.
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Answers
Answer:
About 48
Step-by-step explanation:
If the first two are 66 then you would add 66 + 66 to get 132 then you subtract 180 - 132 which gets you to 48.
Hope this helps :D
PLEASE HELP!!!!! tyyyyy
Answers
Answer:
a
Step-by-step explanation:
I counted :)
Sasha walks at a constant rate. She meets her friend Hannah 0.6 kilometer along the way, and thet continue walking at the same constant rate. When thay get to school, Sasha has walked for 0.6 hour and Hannah has walked 0.45 hour. What is the rate in kilograms per hour at which they walked to school
Answers
Answer:
4 km/hr
Step-by-step explanation:
Sasha walks at a constant rate. She meets her friend Hannah 0.6 kilometer along the way, and they continue walking at the same constant rate. When thay get to school, Sasha has walked for 0.6 hour and Hannah has walked 0.45 hour.
Let
the rate of the speed at which they walked to school be represented by r
Distance to school for Sasha = Distance to school for Hannah
Distance = Speed (rate × time)
Hence:
0.6r = 0.45r + 0.6
Collect like terms
0.6r - 0.45r = 0.6
0.15r = 0.6
r = 0.6/0.15
r = 4 km/hr
The rate in Kilometer per hour at which they walked to school is 4km/hr
What is the equation of a line with Point A(0, 4) and Point B(2,-6) ?
Answers
9514 1404 393
Answer:
y = -5x +4
Step-by-step explanation:
The slope can be found using the slope formula:
m = (y2 -y1)/(x2 -x1)
m = (-6 -4)/(2 -0) = -10/2 = -5
The point (0, 4) tells you the y-intercept is b = 4. So, the equation in slope-intercept form is ...
y = mx +b . . . . . where m is slope and b is y-intercept
y = -5x +4
Dividing by the wrong number when finding the mean is a:
interpretation error.
data collection error.
measurement error.
sampling error.
Answers
Answer:
measurement error
Step-by-step explanation:
hope this helps
HELP PLSSSSSS as soon as possible!
Answers
Answer:
Step-by-step explanation:
DUE IN 27 minutes PLEASE HELP EASYY
Answers
Answer:
6 + 0 = 0 + 6 = 6
12 X (3 X 9)
2 + 6x
3 + 7 + 8 = 7 + __ + 3
27 - 108
-15 - 5m
(6 + 5) + 1
8x + 28
26 X 1 = 1 X 26 = 26
24 + 4s
Step-by-step explanation:
i hope this helps :))
PLEASE HELP I WILL MARK BRAINLIST
Answers
Answer:
Multiply by 5
Step-by-step explanation:
Does the system shown always, sometimes, or never have a solution when a >b?
ax+y=8
bx + y = 5
always
sometimes
O
never
Answers
Answer:
sometimes
Step-by-step explanation:when a >b?
ax+y=8
bx + y = 5
always
sometimes
O
never
Jerry is getting ballons for his fathers bday party if he wants each ballon string to be 9 feet long if it is sold by the yard and jerry wants 63 ballons how much yards of string will he bneed
Answers
Answer:
567
Step-by-step explanation:
63 x 9
the perimeter of Mrs.Moody's rectangular vegetable garden is 66 meters The length is 9 less than twice the width Find the length and width
Answers
The total perimeter is 66.
assume the width is x
The length will be 2x - 9 .
Thus ,
(2x-9) + (2x-9) + x + x = 66
2x - 9 + 2x - 9 + 2x = 66
6x - 18 = 66
x = 14
Thus the width is 14 ,
the length is 2x - 9 , 2(14) - 9 = 19
sorry if i give wrong answer .
The ratio of almond pieces to
cranberry pieces in a salad is 3 to 4.
If there is a total of 28 pieces in
salad, how many are almond pieces
and how many are cranberry
pieces?
37 dimes, 23 quarters.
Answers
Answer: 12 almond pieces and 16 cranberry pieces
Step-by-step explanation:
is it Min or Max
help me pls
Answers
Answer:
Max
Step-by-step explanation:
Since the vertex is on top and the graph is opening down, there is a max value at the top.
Mrs. Reynold’s sprinkle system has 9 stations that water all the parts of her front and back lawn. Each station runs for an equal amount of time. It takes 48 minutes for the 4 stations to water, how long does it takes to water all parts of her lawn?
Answers
Answer:
108 minutes
Step-by-step explanation:
48/4= 12 minutes per 1 station
9x12=108 minutes