# What is the sum of the geometric series 20 + 21 + 22 + 23 + 23 + 24 + … + 29? a. 1,023 b. 511 c. 2,407 d. 1,012

QUESTION POSTED AT 03/12/2019 - 04:21 AM

Since the geometric series is not long we can pair up the number

20 + 29 = 49
21 + 28 = 49
22 + 27  = 49
23 + 26 = 49
24 + 25 = 49
Since we made 5 pairs of 49, the answer is 245.  (49 x 5)

## Related questions

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240-31=209 is the answer i belive

ANSWERED AT 09/12/2019 - 05:12 AM

QUESTION POSTED AT 09/12/2019 - 05:12 AM

### Substitution for x+7y=0 and 2x-8y=22

Then answer to your problem is (7,-1) aka the point of intersection.

ANSWERED AT 09/12/2019 - 05:10 AM

QUESTION POSTED AT 09/12/2019 - 05:10 AM

### Of 60 books on a bookshelf, 24 are nonfiction. What percent of the books are nonfiction?

40% because 24 nonfiction books divided by 60 books in total equals 0.4 which is equal to 40%

ANSWERED AT 09/12/2019 - 05:05 AM

QUESTION POSTED AT 09/12/2019 - 05:05 AM

### Determine if each pair of ratios and rates is equivalent. \$3 for 6 bagels; \$9 for 24 bagels

Ratio is not equivalent because 3 dollars times 3 is 9
6 times 3 is 18
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ANSWERED AT 09/12/2019 - 05:00 AM

QUESTION POSTED AT 09/12/2019 - 05:00 AM

### What equals times what equals 22

The answer is 11 x 2 = 22.

ANSWERED AT 09/12/2019 - 04:58 AM

QUESTION POSTED AT 09/12/2019 - 04:58 AM

### Explain how knowing 1+7 helps you find the sum for 7+1

Knowing 1+7 helps you find the sum of 7+1 because 1+7 and 7+1 is communitive property of addition. Also because 1+7 is the same answer as 7+1.
Ex:
1+7=8
And
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its the same result.

ANSWERED AT 09/12/2019 - 04:58 AM

QUESTION POSTED AT 09/12/2019 - 04:58 AM

### 12% of what number is 24

ANSWERED AT 09/12/2019 - 04:57 AM

QUESTION POSTED AT 09/12/2019 - 04:57 AM

### What is the common factors of 23 and 29

23 and 29 are both prime numbers so the only common factor they would have would be 1.

ANSWERED AT 09/12/2019 - 04:55 AM

QUESTION POSTED AT 09/12/2019 - 04:55 AM

### Solve these word problems 1---3 1: A factory processes 1,560 ounces of olive oil per hour. The oil packaged into 24-ounces bottles.How many bottles does the factory fill in one hour 2: A pond at a hotel holds 4,290 gallons of water.The groundskeeper drains the pound at a rate of 78 gallons of water per hour.How long will it take to drain the pound? 3:Explain using partial quotients to divide is similar to using the Distributive proprerty to multiply

1. To do this, you want to divide 1560 by 24.  This gives you 65.  The bottle fills 65 bottles per hour.
2. To do this divide 4290 by 78.  The result is 55.  It would take the groundskeeper 55 hours to drain the pond.
3. They are similar because you break up pieces of the number and then you combine them.

ANSWERED AT 09/12/2019 - 04:53 AM

QUESTION POSTED AT 09/12/2019 - 04:53 AM

### What is 20% off of \$9

If you want to take 20% off \$9, you must find 80% of \$9. As 100% - 20% = 80%.

80% turns out to be 4/5, 8/10 or 0.8.

8/10 x 9

= 72/10

= 7.2

----------

\$7.20

ANSWERED AT 09/12/2019 - 04:50 AM

QUESTION POSTED AT 09/12/2019 - 04:50 AM

### What is the value of 138+(20-15)

The answer is 133 so why u just add 138 with 20 and then u will subtract 15.

ANSWERED AT 09/12/2019 - 04:49 AM

QUESTION POSTED AT 09/12/2019 - 04:49 AM

### From 20 students to 30 students

20:30 and when you simplify it you get 2:3

ANSWERED AT 09/12/2019 - 04:33 AM

QUESTION POSTED AT 09/12/2019 - 04:33 AM

### Triple the sum of 45 and 55

Do I time 45 times 55

Step-by-step explanation:

ANSWERED AT 09/12/2019 - 04:30 AM

QUESTION POSTED AT 09/12/2019 - 04:30 AM

### Find two integers whose sum is -7 ans whose product is 12. Explain how you found the numbers.

-3 + -4 = -7
add the numbers and keep the common sign.
-3 * -4 = 12
since the factors are both negative, the product is positive, when multiplying and/or dividing.

ANSWERED AT 09/12/2019 - 04:26 AM

QUESTION POSTED AT 09/12/2019 - 04:26 AM

### At a dog park, there are 12 golden retrievers and 20 poodles . what is the ratio of golden retrievers to poodles

Um not to be rude or anything but wouldn't the ratio be 12:20.

ANSWERED AT 09/12/2019 - 04:25 AM

QUESTION POSTED AT 09/12/2019 - 04:25 AM

### Stephens family had a reunion last weekend. If there were 24 family members and 8 apple pies cut into 6 slices, what answer choice represents the fraction of one apple pie that each family member received?

Stephens family had a reunion last weekend.
If there were 24 family members and 8 apple pies cut into 6 slices,
what answer choice represents the fraction of one apple pie
Each family member received 1/4 of an apple pie.

ANSWERED AT 09/12/2019 - 04:00 AM

QUESTION POSTED AT 09/12/2019 - 04:00 AM

### If 18 is added to a certain number and the sum is divided by 6, the result is 1 more than 14 of the original number. Find the original number.

The original number is 72

(18+x)/6 = 1+14
1/6x + 3 = 1 + 14 (Distribute)
1/6x + 3 = (1+14) (Combine Like Terms)
1/6x + 3 = 15
- 3 = -3          (Subtract 3 From Both Sides)
1/6x = 12
(1/6x)*6 = 12 * 6  (Multiply Both Sides By 6)
x = 72

ANSWERED AT 09/12/2019 - 03:58 AM

QUESTION POSTED AT 09/12/2019 - 03:58 AM

### taryn's grandmother took her family out to dinner the receipt shows the total amount spent taryns dinner was 20% of the total bill after tax and tip how much war taryns dinner? THE BILL subtotal...........................\$58.38 tax.....................................................\$3.38 tip..................................................................\$12.24

Step-by-step explanation:

ANSWERED AT 09/12/2019 - 03:54 AM

QUESTION POSTED AT 09/12/2019 - 03:54 AM

### 15 is 23% of what number

15 = 0.23x
x = 65.2

therefore 15 is 23% of 65.2

ANSWERED AT 09/12/2019 - 02:43 AM

QUESTION POSTED AT 09/12/2019 - 02:43 AM

### Tim counted 24 mole rats in an exhibit at the zoo. Then he realized that he forgot to count x mole rats. A. Write an expression to represent the number of mole rats in the exhibit. Why is this the correct expression? B. Suppose a sign next to the exhibit says there are 36 mole rats. What is the value of x? Explain your reasoning. C. Now that you know there are 36 mole rats in the exhibit, write an expression to represent the number of mole rats that Tim counted. Use x in the expression

A. 24 + X

B. 24 + X = 36

C. 36 - 24 = X

ANSWERED AT 09/12/2019 - 02:41 AM

QUESTION POSTED AT 09/12/2019 - 02:41 AM

### Bus A takes 21 minutes to complete its route. bus B take's 35 minutes to complete its route. if both buses leave the station at 7:30 a. M At what time will they arrive at the station at the same time??

To answer this question I tried to find a common multiple of 21 and 35 which I found to be 105. As they are in minutes 105 is 1 hour and 45 minutes; after this I found 1 hour 45 munutes after 7:30, I then got 9:15

ANSWERED AT 09/12/2019 - 02:39 AM

QUESTION POSTED AT 09/12/2019 - 02:39 AM

### In October, Greg and Thomas had the same amount of money in their savings accounts. In November, Greg deposited \$120 into his account. Thomas increased the money in his account by 20%. When they compared their balances, they found that they were still equal. How much money did each person have in his account in October?

The answer is 600 for people who don't understand the other answer ( not to be rude, It is a really good answer )

Step-by-step explanation:

ANSWERED AT 09/12/2019 - 02:39 AM

QUESTION POSTED AT 09/12/2019 - 02:39 AM

### Find a sum equivalent to the product 6(y + x)

6y+6x
all you do is the distributive property

ANSWERED AT 09/12/2019 - 02:36 AM

QUESTION POSTED AT 09/12/2019 - 02:36 AM

### What is the sum 2/3 + 7/15 A.14/45 B.1/2 C. 3/5 D.1 2/15

because you have to make the denominators the same so you have to multiply 3 until it gets to 15 and 3x5 is 15 and whatever you do to the denominator you have to do to the numerator

:)

ANSWERED AT 09/12/2019 - 02:33 AM

QUESTION POSTED AT 09/12/2019 - 02:33 AM

### Shania is making eight gift bags to give out to her friends coming over to her house for a movie night. Each gift bag will contain x nail polishes and a manicure kit. Including tax, each nail polish costs \$2.50 and each manicure kit costs \$4.00. The following expression shows the amount of money Shania will spend on gift bags. Which of the following descriptions are equivalent ways to write this problem? Shania will spend 6.5x dollars on each of the eight gift bags, for a total of 52x dollars. Shania will spend a total of 20x dollars on nail polish and a total of 32 dollars on manicure kits. Shania will spend 2.5 dollars each on x nail polishes for eight gift bags and 4 dollars each on eight manicure kits. Shania will spend x dollars each on 20 nail polishes and 4 dollars each on eight manicure kits.

Hey! =) The answer would be B. =)

ANSWERED AT 09/12/2019 - 01:31 AM

QUESTION POSTED AT 09/12/2019 - 01:31 AM

### The mass of an object is equal to the product of the object's density and volume. The density of titanium is 4.51 grams per cubic centimeter. If the volume of a piece of titanium is 21 cubic centimeters, what is its mass? 0.22 grams 94.71 grams 284.13 grams 25.51 grams

284.13 grams

because you do 4.51 x 21 , then you have to multiply by 3

ANSWERED AT 09/12/2019 - 01:28 AM

QUESTION POSTED AT 09/12/2019 - 01:28 AM

### The winning time for the men’s 400-meter race in each of the Olympic Games from 1976 to 1996 can be modeled by the equation y = −0.054x 44.54 , where x is the number of years after 1976 and y is the winning time in seconds. If the relationship continues, which equation could be used to predict the winning time in the year 2020? A. y = −0.054(1976) 44.54 B. y = −0.054(2020) 44.54 C. y = −0.054(24) 44.54 D. y = −0.054(44) 44.54

D. y= -0.054(44) 44.54 because the years 1976 and 1996 are 20 years apart, that would be the original X, but it asks for the year 2020 which is 44 years from 1976, so plug 44 in for x and it will be right. ;)

ANSWERED AT 09/12/2019 - 01:27 AM

QUESTION POSTED AT 09/12/2019 - 01:27 AM

### The sale price , s , of an item is 20% off the regular price , r . Which. Equation below expresses this relationship

I would think that thwe equation used to solve it would be 0.2 - r = s.

ANSWERED AT 09/12/2019 - 01:27 AM

QUESTION POSTED AT 09/12/2019 - 01:27 AM

### Why is 2.3 - 20 = 17.7 reasonable

You have the problem backwards. It is 20 - 2.3= 17.7. This is because 17.7 plus 2.3 equals 20.

ANSWERED AT 09/12/2019 - 12:25 AM

QUESTION POSTED AT 09/12/2019 - 12:25 AM

### During an evening out, Dean paid a cab driver \$20. He then spent \$25 on dinner and half of his remaining money on a painting. He bought an umbrella for \$23.75 and had \$42.15 left. How much money did Dean have at the beginning of the weekend?

20+25 divided by 2 +23.75 - 42.15 = 4.100...

ANSWERED AT 09/12/2019 - 12:21 AM

QUESTION POSTED AT 09/12/2019 - 12:21 AM