3 years ago

How many pairs of number equal the sum of 12

1 answer:

7 0

Total numbers of whole number that has a sum of 12.
1. 11 + 1 = 12
2. 10 + 2 = 12
3. 9 + 3 = 12
4. 8 + 4 = 12
5. 7 + 5 = 12
6. 6 + 6 = 12
7. 12 + 0= 12

so there are 7 pairs of whole numbers being added that have a sum of 12

You might be interested in

What is the sum of the geometric series in which a1 = −5, r = 3, and an = −405?

xxMikexx [17]

$a_1=-5;\ r=3;\ a_n=-405\\\\a_n=a_1r^{n-1}\\\\subtitute\\\\-5\cdot3^{n-1}=-405\ \ \ |divide\ both\ sides\ by\ (-5)\\\\3^{n-1}=81\\\\3^{n-1}=3^4\iff n-1=4\to n=5\\\\S_n=\dfrac{a_1(1-r^n)}{1-r}\\\\S_5=\dfrac{-5(1-3^5)}{1-3}=\dfrac{-5(1-243)}{-2}=\dfrac{5\cdot(-242)}{2}=5\cdot(-121)=-605\\\\\\Answer:\boxed{S_5=-605}$

4 0

3 years ago

Find the area of the shaded sector of the circle. Leave your answer in terms of pi.

pentagon [3]

We know that
area of circle =pi*r²
for r=4 ft
area=pi*4²------> 16*pi ft²

the shaded sector of the circle represent 3/4 of the total area
so
3/4*16*pi-----> 12*pi ft²

the answer is
12*pi ft²

3 0

3 years ago

Read 2 more answers

What is the value of x in the figure? Enter your answer in the box. x =

raketka [301]

Answer:

x=90-22

x=68

as the ray divide the right angle into 2

5 0

3 years ago

Danny poured 78 l of water into containers xy and z. the ratio of the volume of water in container x to the volume of water in c

Paladinen [302]

The ratio of x:y:z = 20:8:11

Total unit = 20+8+11 = 39

Value of 1 unit ratio = 78/39 = 2

So, the water in container X, 20(2) = 40 liters

Your answer is 40 liters

7 0

3 years ago

Last year,Jim opened an investment account with $7400. At the end of the year, the amount in account had increased by 26.5%. How

KonstantinChe [14]

Step-by-step explanation:

I=prt

I=7400×(26.5/100)×1

I=$1961

total money 7400+1962= $9361

7 0

3 years ago