An auditorium has 21 rows of seats. The first row has 18 seats and each succeeding row has 2 more seats than the previous row. How many seats are in the auditorium?
Answer:
798
Step-by-step explanation:
So, 21*{2*18 + (21-1)*2}/2
= 21*{36 + 20*2}/2
= 21*{36+40}/2
= 21*76/2
= 1596/2
= 798
Total number of seats is 798
Given that;Number of seats in first row = 18
Number of rows = 21
Each row added number of seats then previous = 2
Find:Total number of seats
Computation:Total number of seats = Sn = (n/2)[2a + (n-1)d]
Total number of seats = Sn = (21/2)[2(18) + (21-1)2]
Total number of seats = (21/2)[36 + (20)2]
Total number of seats = (21/2)[36 + 40]
Total number of seats = (21/2)[76]
Total number of seats = (21)(38)
Total number of seats = 798
Learn more:https://brainly.com/question/16668552?referrer=searchResults
please help :(((((!!!
Answer/Step-by-step explanation:
1. x = 130 ° (corresponding angles theorem)
y = x (vertical angles theorem)
y = 130 (substitution)
Or
y = 130° (alternate exterior angle theorem)
2. x = 65° (corresponding angles theorem)
y = 180 - 65 (linear pair theorem)
y = 115°
3. x = 180 - 80 (linear pair theorem)
x = 100°
y = 80° (alternate exterior angle theorem)
13. Find the measures of the numbered angles.
Answer:
8=117 7=63 9=63
Step-by-step explanation:
180-117 = 63
7 and 9 = 63
A straight line=180
Angles across from each other are the same
9 and 7 are the same, and 117 degrees and 8 are the same
Find the value of 56÷p when p=7.
Answer:
8
Step-by-step explanation:
56/7 = 8
Answer:
8
56 /p.
is is given that
p = 7
now putting the value of p in question
then we get
56/7
8
hope it helps
Math- Lisa is buying a cover for her patio table. If the table is 5 ft on all sides, what is the area of the cover?
Answer:
25
Step-by-step explanation:
length times width
5 times 5
Jack has 5 apples, he picks out 3 pears. If his train is 7 minutes late, how much time does he have until he dies?
Answer:
huh
Step-by-step explanation:
Answer:
uh well I can't be sure but i would say approx 69 minutes since the train happens to be exactly 7 min late
The figure does not have enough information to state that the two triangles are similar. Explain why you can not prove the triangles similar? What additional information would be needed? (worth 20 points)
Answer:
We can't prove it equal because the measures are different, it cannot be proved through AAS, ASA, SAS or SSS
angle U=Angle R
but UW≠ RT &RS
Step-by-step explanation:
Please help me...will mark brainiest
Answer:
x-121
Step-by-step explanation:
Answer:
x² - 22x + 121
Step-by-step explanation:
(x-11)² is the same as (x-11)(x-11)
multiply the x in the first parentheses by x and -11 in the other parentheses and multiply the -11 in the first parentheses by x and -11 in the other parentheses and add all together
x²- 11x - 11x + 121
x² - 22x + 121
Please help this is due soon!!! :( Please explain with explanation and answer pls
Answer for A:
x = -56/31
Step-by-step explanation:
The total angle for a pentagon is 360°
100 + 20(-56/31) + 140 + 160 - 5(-56/31) + 16(-56/31) + 16 = 360
100 + -36.1290322581 + 140 + 160 + 9.03225806452 + 28.9032258065 + 16 = 360
If you copy that into a calculator you will get
360°
Answer for B:
The angle for C, rounded to the nearest tenth, is 44.9°
define Multiplication Property Of Inequality
Answer:
Step-by-step explanation:
basically it's when the order changes, but the value doesnt.
example: a*b=b*a
write and solve an equation to find the missing diemsion of the circle
diameer=24
Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!
tinyurl.com/wtjfavyw
Need help with this problem please!!!!
Answer:
he gets paid $40 for every watch tha the sells plus $800 dollars a month as a base salary
Wallpaper was applied to one rectangular wall of a large room. Width: 42 ft length:25.5 ft. If the total cost of the wallpaper was $771.12, what was the cost, in dollars, of the wallpaper per square foot?
Answer:
$825869.52
Step-by-step explanation:
Given that,
Width of the rectangle, b = 42 ft
Length of the rectangle, l = 25.5 ft
The area of a rectangle is given by :
A = lb
So,
A = 42 ft × 25.5 ft
A = 1071 ft²
The total cost of the wallpaper was $771.12 . So,
Cost = 1071 × 771.12
= $825869.52
So, the cost of wallpaper per square foot is equal to $825869.52.
Jack has $500 in a bank account that will earn 3% interest every year. Diane has $100 in an investment account that will earn 12% every year. How many years will it take for Diane's account balance to overtake Jack’s?
Answer:
20 years
Step-by-step explanation:
A=500(1+.03)^20
$903
A=100(1+.12)^20
$964
It took her 20 years to overtake.
Answer:
Simple interest = NeverCompound interest = 19 years and 4 monthsStep-by-step explanation:
Jack
Initial amount = $500Interest rate = 3% = 0.03Yearly interest = 0.03*500 = $15
Diane
Initial amount = $100Interest rate = 12% = 0.12Yearly interest = 0.12*100 = $12
Diane's initial amount and yearly interest amount are both less than of Jack's.
It means her balance will never overtake Jack's.
=======================
It is not mentioned in the question but let's assume it is compound interest which is annually compounded.
Then after x years their balance will be:
Jack
500(1 + 0.03)^x = 500*1.03^xDiane
100(1 + 0.12)^x = 100*1.12^xSolve inequality below:
100*1.12^x ≥ 500*1.03^x(1.12/1.03)^x ≥ 51.087^x ≥ 5x log 1.087 ≥ log 5x ≥ log 5 / log 1.087x ≥ 19.29 years = 19 years and 4 monthsHelp anyone please god lord anyone please lord pleaseeeee
que es el dominio en notación de intervalo?
Answer: El dominio es el conjunto de números reales. En forma de intervalo, el dominio de f es (−∞, ∞). Identifica los valores de entrada. / The domain is the set of real numbers. In interval form, the domain of f is (−∞,∞). Identify the input values.
Step-by-step explanation: Used my sheet.
guess how tall i'm, i'm 13
Answer:
8'9
Step-by-step explanation:
Answer:
6
..........................
the width of a rectangle is 4 feet, and the diagnal length of the rectangle is 13 feet,which measurment is the closest to the length of this rectangle feet?
A.9ft
B.17ft
C.12.4ft
D.13.6ft
Answer:
w = 4 ft
diagonal= 13 ft
l= 13^2-4^2=169-16 = sq root 153
=12.4 ft (approx)
ADD two expressions
-3t-1 and 6t + 10
5 customer entered a store over the course of 3 minutes At what rate were the customers entering the store in customer per minutes.
Answer:
1.67 people per minute
Step-by-step explanation:
it's a proportion, basically. 5/3 = x/1, solve and you get 1.67. BTW if only five people enter in the span of 3 minutes, then this store needs to invest in advertising more, because i've seen CVS's with a better ratio than that. and that's sad!
Rewrite 15/8 as a mixed number.
[tex]1\frac{7}{8}[/tex]
158 sorry i dont know the rewrite part Step-by-step explanation:
2/5 divided by 1 7/8 in the as a fraction in it simplest form
7/20
hope this helps dude
The fraction to represent the 2/5 divided by [tex]1\frac{7}{8}[/tex] is 16/75.
What is the fraction?In Mathematics, fractions are represented as a numerical value, which defines a part of a whole. A fraction can be a portion or section of any quantity out of a whole, where the whole can be any number, a specific value, or a thing.
Given that, 2/5 divided by [tex]1\frac{7}{8}[/tex] =15/8.
Here, 2/5 ÷ 15/8
When two fractions are divided, the first fraction is multiplied by the second fraction's reciprocal. Finding the reciprocal of the second fraction reversing its numerator and denominator is the first step in dividing fractions. Multiply the two numerators after that. Multiply the two denominators after that.
2/5 × 8/15
= 16/75
Therefore, the fraction is 16/75.
To learn more about the fraction visit:
brainly.com/question/1301963.
#SPJ2
What is the value of x for the similar shapes
:( someone pls help I’ll give brainiest if u tell me how to do this
PLS HELP ME ITS DUE IN 5 MINS
The diagram shows a right triangle and three squares. The area of the largest square is 555555 units^2
2
squared.
Which could be the areas of the smaller squares?
Choose all answers that apply:
Choose all answers that apply:
(Choice A)
A
121212 and 434343
(Choice B)
B
141414 and 404040
(Choice C)
C
161616 and 373737
Answer:It's 12 and 43
Step-by-step explanation:
Answer:
43
Step-by-step explanation:
ONLY 2 MINS HELP!!!!!!!!!!!!!!!!!!!1
Answer:
the answer you are looking for is C
HELP ASAP PLZ. This is timed. I will award 50pts and Brainly to whoever can give me the slope intercept form to this equation. It is vital to my math grade. I risk failing if I don't get this right. HELP HELP HELP. Time is on the essence and my grade is at risk
Answer:
(0,7)
(7/3,0)
Hope this helps!
Step-by-step explanation:
While waiting for a video game to download, you notice that
30
%
30%30, percent of
32
,
000
32,00032, comma, 000 kilobytes have been downloaded so far.
How many kilobytes have been downloaded so far?
What is the slope of a line of best fit if its equation is y = −8x + 9?
Answer:
-8
Step-by-step explanation:
-8 also = -8/1, which you would use as your slope on a graph.
The Y intercept would then be (0,9)
Answer:
-8
Step-by-step explanation:
what is the scientific notation of 0.0000003
Answer:
This is ur answer.
Hope.it helps!!!
2x3 equals what because I didn’t get it
Answer:2×3=6
or Add 2 three times