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ddd [48]
3 years ago
9

What is the expanded notation for 2,909? Numbers may be used Once,More than once, or not at all.

Mathematics
1 answer:
defon3 years ago
3 0
(2 x 1,000) + (9 x 100) + (9 x 1)
Always check the place values by looking at the number (2,909) and you can figure out what number to multiply it by. Guess and check if you can’t recognize it right away.
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calculate the volume of each cone. Use 3.14 for π. Round answers to the nearest hundredth if necessary.​
coldgirl [10]

Answer:

2355 cm^2

Step-by-step explanation:

The volume of a cone is given by

V = 1/3 pi r^2 h

V = 1/3 (3.14) (15)^2 (10)

V =2355

8 0
2 years ago
1.
Sergeeva-Olga [200]

Answer:

Step-by-step explanation:

- An airplane leaves Los Angeles for Denver at a speed of 430 mph. Thirty minutes later another plane going from Denver to Los Angeles leaves Denver, which ... So to begin with plane 1 got a 30 minute head start, so since it was going at 430 miles per ... LOS ANGELES - DENVER...430 miles/hour, x hours.

4 0
3 years ago
what algorithm (rule) will produce the correct result for the sum "a+b" where a and b each represent any rational number.
Leokris [45]

Answer:

To find the sum of  a + b where a and b are rational number.

1. when a and b are natural numbers

just add them . for example a =3, b=8

then ,a + b = 11

2. When a and b  are whole numbers,

simply add them . for example a= 0, b=8

a+ b = 0 + 8= 8

3. When  a and b are integers

for example, a =-1 b=8,

a+ b= -1+ 8 =7,

a=-2, b= -8

a+ b= -2-8=-10

a= -6 , b=2

a+ b= -6 + 2= -4

a= 8, b= -2

a+ b= 8 +(-2) =6

I have written this because Rational number = [Integers{Whole number(Natural number)}]

now when a= Any fraction=\frac{p}{q} and b = Any fraction=\frac{u}{v}

now ,

\frac{p}{q} + \frac{u}{v}

Find L.C.M of q and v

= if q and v are Co-prime , just multiply them to find their  L.C.M.

For example 14,9. LCM=14×9=126

Otherwise, Find factors of q and v . Then take out common factors first and then multiply the remaining with with common factors.For example

q=12 and v=18

12 =2×2×3

18=2×3×3

common factor =2,3

non common=2,3

L.C.M= 2×2×3×3=36

Suppose LCM of q and v = r

then ,\frac{p}{q} + \frac{u}{v}

=\frac{{\frac{r}{q}}\times p+{\frac{r}{v}\times u}}{r}\\

= {{\frac{r}{q}}\times p+{\frac{r}{v}\times u}} = k

then ,

a + b=\frac{k}{r}





5 0
3 years ago
What was his mistake????
stealth61 [152]
He didn't distribute 1/3 to x and 15 before solving
4 0
3 years ago
I was reading a book of 560 pages. On Sunday, I was able to finish 1/4pages of the book. How many pages do I read on Sunday?
kolbaska11 [484]

Answer:

140

Step-by-step explanation:

560. 1

____. ÷. ______

1. 4

Cross out the numbers that are divisible

560/4 = 140

5 0
2 years ago
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