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alexandr1967 [171]
4 years ago
12

An Arithmetic series has 20 terms. The first term is -81. The sum of all the terms is -480. Use the arithmetic sum formula to fi

nd the last term
Mathematics
1 answer:
timama [110]4 years ago
4 0

Answer:

The last term is 33.

Step-by-step explanation:

Sn = (n/2)(a1 + L)    where a1 = first term and L = the last.

So:

-480 = (20/2) ( -81 + L)

-480 = 10( L - 81)

L- 81 = -480 / 10 = -48

L = -48 + 81

L = 33.

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The ratio of adult cat two kittens at the pet care Center on Sunday was 5 to 4. That day there was 24 kittens. Thursday, there w
iVinArrow [24]

Answer:

The difference is 1

Step-by-step explanation:

Because the ratio is 5:4, there are 5/4 times as many adult cats as kittens, or 4/5 times as many kittens than adult cats.

So you do:

24 × 5/4

= 24/1 × 5/4

= 120/4

= 30

31 - 30 = 1

4 0
2 years ago
Enter the number in standard notation.<br> 8.026 x 10-6 =<br> What is the answer?
juin [17]

Answer:

.000008026

Step-by-step explanation:

move the decimal forward 6 places

4 0
4 years ago
List 0.43, 5, 6 and 4.7 from least to greatest
Mamont248 [21]

Answer:

0.43, 4.7, 5, 6

Step-by-step explanation:

0.43

6 0
4 years ago
A box of chocolates was shared evenly between 5 people. Each person received 4 chocolates.
posledela

Answer:

20

Step-by-step explanation:

5x4=20

plz give me a thx! IF I HELPED :)

3 0
3 years ago
If 3a+4a=14, and b+6b=21, then 7(a+b) =<br><br> Help and show work!
den301095 [7]
Hello!

You have to find what a and b are

3a + 4a = 14
b + 6b = 21

Lets do a first

3a + 4a = 14

Combine like terms

7a = 14

Divide both sides by 7

a = 2

Now lets do b

b + 6b = 21

Combine like terms

7b = 21

Divide both sides by 7

b = 3

Put a and b into the third equation

7( 2 + 3) = 

Do what is in parenthesis first

7(5) = 

Multiply

35

The answer is 35

Hope this helps!
8 0
3 years ago
Read 2 more answers
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