Answers
Answer:
121.5
Step-by-step explanation:
a geometric series : a1 + a1×r + a1×r^2 + a1×r^3 + ...
so, a1 = 50
a2 = a1×r = 30
=> 50×r = 30
=> r = 30/50 = 3/5
a3 = a2×r = a1×r^2 = 50×9/25 = 18
S7 = (50 - 50×(3/5)^7) / (1 - 3/5) =
= (50 - 50×(2187/78125)) / (2/5) =
= 5×(50 - 50×(2187/78125)) / 2 =
= 5×(25 - 25×(2187/78125)) = 125×(1 - 2187/78125) =
= 125×(78125-2187)/78125 = 125×75938/78125 =
= 75938 / 625 =
121.5 (121.5008)
Related Questions
Plz help me plzzz thank you if you do
Answers
=========================================================
Explanation:
We have c^2 + 2c, where 2 is the coefficient of the c term
This halves to 2/2 = 1, and then we square that to get 1^2 = 1.
Adding 1 to c^2+2c will result in c^2+2c+1, allowing it to be factored. This is because it's a perfect square
The rule we use is
(a+b)^2 = a^2 + 2ab + b^2
Write the ratio of corresponding sides for the similar triangles and reduce the ratio to lowest terms.
ETIH
12
5
15
a.
12
4
5
15
5
b.
4
5
4
15
12
15
C.
4
5
1
12
10
3
d.
15
5
5
m
4
--
12
4
Answers
Answer: the answer is C
Step-by-step explanation: because
While studying a 100 square mile area of jungle, a researcher finds 50 monkeys. Predict how many monkeys might inhabit a 1,500 square mile jungle.
Answers
Answer:
750 monkeys (probable chance)
Step-by-step explanation:
100 : 50
100 square miles to a 2:1 ratio of 50 monkeys
Simply, insert the new area into the ratio to get the result.
1500 ---> 2:1
1500/2 = 750
1500:750
Thus, there would probably be 750 monkeys inhabiting a 1,500 square mile jungle.
24-67-88+77-77+78-55+888
Answers
Answer:
780
Step-by-step explanation:
24 - 67 = - 43
- 43 - 88 = - 131
- 131 + 77 - 77 = - 131
- 131 + 78 = - 53
- 53 - 55 = - 108
- 108 + 888 = 780
Please answer number 7 I’ll give brainliest thanks!
Answers
Please mark brainliest so that I may level up :)
Solve the system of equations.
9x+11y=2
3x+4y=4
Answers
Answer:
X= -12 Y=10
Step-by-step explanation:
The solution is, Solve of the system of equations.
9x+11y=2 & 3x+4y=4 is, x = -12 & y =10.
What is equation?An equation is a mathematical statement that is made up of two expressions connected by an equal sign. In its simplest form in algebra, the definition of an equation is a mathematical statement that shows that two mathematical expressions are equal. For instance, 3x + 5 = 14 is an equation, in which 3x + 5 and 14 are two expressions separated by an 'equal' sign.
here, we have,
given that, the system of equations.
9x+11y=2 .......(1)
3x+4y=4 ...........(2)
now, for solving, multiply (2) by 3 & subtract from (1),
we get,
9x + 11y = 2
9x + 12y = 12
---------------------
y= 10
from (1), we get, x = -12
Hence, The solution is, Solve of the system of equations.
9x+11y=2 & 3x+4y=4 is, x = -12 & y =10.
To learn more on equation click:
brainly.com/question/24169758
#SPJ2
The point (8, 7) is reflected over the x-axis. What quadrant is the new point located in? A. Quadrant I
B.Quadrant II
C.Quadrant III
D.Quadrant IV
Answers
Answer:
.quadrant 4 is the new point locatef
which expression represents the value of pi?
Answers
Find the perimeter of the rectangle
Answers
Answer:
I got 21 ft
Step-by-step explanation:
I converted all of the measurements that were shown in feet to inches (there are 12 inches in 1 foot), then added all of the sides together. Once I got that answer, I converted the inches back to feet by dividing the sum of the sides by 12.
Nicholas performs an experiment in which he pulls a marble from a bag. In his experiment, he finds that he is twice as likely to pull a red marble as a blue marble. If Nicholas pulls 10 red marbles, how many blue marbles does he pull?
Answers
Answer:
Nicholas pulls 5 blue marbles from the bag.
Step-by-step explanation:
Since Nicholas performs an experiment in which he pulls a marble from a bag, and in his experiment, he finds that he is twice as likely to pull a red marble as a blue marble, to determine, if Nicholas pulls 10 red marbles, how many blue marbles does he pull, the following calculation must be performed:
10/2 = X
5 = X
Therefore, Nicholas pulls 5 blue marbles from the bag.
The table below shows the possible outcomes of rolling a six-sided number cube and flipping a coin.
what is the probability of getting a number less than 3 and tails
A. 1/12
B. 1/6
C.1/4
D. 1/3
Answers
Answer:
c is the correct answer but i am not sure
Sara drove 96 miles on 3.2 gallons of gas. How many miles can Sara drive on 12.5 gallons of gas
Answers
Answer:
375 miles
Step-by-step explanation:
Create a proportion where x is the number of miles she can drive on 12.5 gallons of gas:
[tex]\frac{96}{3.2}[/tex] = [tex]\frac{x}{12.5}[/tex]
Cross multiply and solve for x:
3.2x = 1200
x = 375
So, with 12.5 gallons of gas, Sara can drive 375 miles
Find the solution to the system of equations y=1/2x +1, y= -x-2
Answers
-x-2=1/2x-2
-1.5x-2=1
-1.5x=3
X=-2
(-2,0)
Answer:
answer is (1,0)
Step-by-step explanation:
help me! the answer is not unit
Answers
Use the integers that are closest to the number in the middle. √32
Answers
Answer:
4√2
Step-by-step explanation:
√32 = √(16 * 2) = 4√2
2+3
For what value of a does
9
(3)"
?
-
73
3
1
Answers
Answer:
3
Step-by-step explanation:
3 × 3 = 9
( 3 + 3 + 3 = 9 )
______________________________________
can someone help me find x
Answers
Answer:
x = 5
Step-by-step explanation:
Since this shape is a quadrilateral, the sum of the interior angles is 360.
Equation:
81 + 20x - 16 + 15x + 30 + 16x + 10 = 360
51x + 105 = 360
51x = 360 - 105
51x = 255
x = 5
The sum of two numbers is 32. One number is 10 more than the other. Find the numbers
Answers
Answer:
12 and 10
Step-by-step explanation:
Answer:
11 and 21
Step-by-step explanation:
Let the first number equal x. If the first number, the second number is ten more, and can represented as x + 10. Now, the sum is 32, so we can add the two numbers to get 32:
x + x + 10 = 32
2x + 10 = 32
2x = 22
x = 11
If the first number 11, the second number is 10 more, and therefore is 21.
Please help me I would appreciate it a lot
Answers
Answer:
Juan can consume 2.22 calories per day
Step-by-step explanation:
[tex]68.820 \div 31 \: day \: month \: \\ \\ = 2.22[/tex]
find the value of using property of 3295×999+3295 Solution
Answers
Answer:
3295000
Step-by-step explanation:
3295×999+3295
3295 * 999 = 3291705
3295×999+3295
3295 * 999 + 3295
3291705 + 3295 = 3295000
Which of the following is equivalent to 24/80
Answers
Answer:
0.3
Step-by-step explanation:
speeeeeeeeeeeddddddddddddddddd (might give brainlest
Answers
Answer:
6
Step-by-step explanation:
6 times 6 is 36 and the formula for area is
lxw(Length times width)
Which equation has a graph that lies entirely above the x-axis?
Answers
Answer: c
Step-by-step explanation:
y=(x-7)^2+7
Amplitude and Period
Determine the amplitude of the function y = sin x from the graph shown below:
a. 2
b. 1
c. 3
d. 4
Please select the best answer from the choices provided
Answers
Answer:
A. 2
Step-by-step explanation:
I calculated it logically
Gavin and his friends want to share 1/3 of a cake equally. Gavin says that each friends will get 1/9 of the cake. Use the drop-down menus to explain whether or not Gavin is correct.
Answers
Answer:
Step-by-step explanation:
I put incorrect
Second box is 4
And third box is 4
And fourth box is 1/12
Answer:
Gavin is correct
Step-by-step explanation:
2 box is 3
3 box is 1/3
So the answer is 1/9
12 hrs 40 min + 10 hrs 30 min
Answers
Answer:
23 hours and 10 minutes
Need help!!!!!!!!!!!! Struggling
Answers
A = 28.26 sq yds
Step-by-step explanation:
diameter (D) = 6 yds
radius (r) = D/2 = 3 yds
A = πr^2
= (3.14)(3 yds)^2
= 28.26 sq. yds
Simplify (5m - 4)2 using the square of a binomial formula.
A) 5m2 - 20m - 4
B) 25m2 – 40m + 16
C) 25m2 + 40m + 16
D) 5m2 – 40m + 4
Answers
Answer:
[tex]25m^{2} -40m+16[/tex]
Step-by-step explanation:
Rewrite (5m−4)^2 as (5m−4)(5m−4).
Expand (5m−4)(5m−4) using the FOIL Method.
[tex]25m^{2} -40m+16[/tex]
Two bottles of honey are compared,one costs R89,99 for 530g and the other. R59,99 for 375g.Which one is cheaper
Answers
A window in the shape of a rectangle as shown below has a width of 2X +1 and the length of X squared minus 5X -7
Answers
Answer;
14x-12
Explanation:
Since we are not asked what to fine, we can find the perimeter of the rectangle
Perimeter = 2(L+W)
Perimeter = 2(2x+1+5x-7)
Perimeter = 2(7x - 6)
Perimeter = 14x - 12
Hence the perimeter of the rectangle is 14x-12