All categories

3 years ago

How does 4 2/5 = 4.40

Mathematics

2 answers:

Alika [10]3 years ago

6 0

4 is the whole number and 2 divided by 5 = .4, so 4+.4= 4.4 which is the same as 4.40

kati45 [8]3 years ago

4 0

So the first thing to remember is that the 4 on the mixed number is a whole number and will still be whole in the decimal. That is to say that it will be in front of the decimal. Now, to turn a fraction into a decimal, you can either divide the numerator by the denominator or put it over 10, 100, 1000, etc. So I will show you how to put the fraction over ten.

2/5 x 2/2 = 4/10

So now you put the 4 into the tenths place of the decimal, or .40. Then add the whole number to the front, and you get 4.40 as the answer.

Hope this helps, if you still have questions please comment! :)

You might be interested in

Solve 2x +6 < 10 I WILL GIVE BRAINLIEST IF ANSWER IS CORRECT!!

Alika [10]

Answer:

X=2

Step-by-step explanation:

hope this helps

5 0

2 years ago

Read 2 more answers

The Jayden family eats at a restaurant that is having a 15% discount promotion. Their meal costs $78.85 before the discount, and

erik [133]

Answer:

$80.22

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

A tree casts a shadow 24 feet long. a 5 foot person casts a 8 foot shadow.How tall is the tree?

ra1l [238]

(length of tree's shadow)/(height of tree) = (length of person's shadow)/(person's height)

24/x = 8/5

24*5 = x*8

120 = 8x

8x = 120

8x/8 = 120/8

x = 15

The tree is 15 feet tall

8 0

3 years ago

Derive the formula for the area of a sector, and then use it to choose all that are correct.

Marina CMI [18]

Answer:

Part A) $A_s=\frac{\pi r^{2}}{360^o}{\theta}$

Part B) option 1,option 4

Step-by-step explanation:

Part A) Derive the formula for the area of a sector

we know that

The area of circle is equal to

$A=\pi r^{2}$

The area of circle subtends a central angle of 360 degrees

using proportion

Find out the area of a sector $A_s$ by a central angle of ∅ degrees

$\frac{\pi r^{2}}{360^o}=\frac{A_s}{\theta}$

$A_s=\frac{\pi r^{2}}{360^o}{\theta}$

Part B) Verify each case

case 1) we have

radius = 5 cm

angle = 120°

area = 26.2 cm 2

Find the area of the sector and then compare with the value of the given area

assume

$\pi=3.14$

substitute the given values

$A_s=\frac{(3.14)(5)^{2}}{360^o}{120^o}$

$A_s=26.2\ cm^2$

The given value of area is correct

case 2) we have

radius = 4 cm

angle = 105°

area = 16.7 cm 2

Find the area of the sector and then compare with the value of the given area

assume

$\pi=3.14$

substitute the given values

$A_s=\frac{(3.14)(4)^{2}}{360^o}{105^o}$

$A_s=14.7\ cm^2$

The given value of area is not correct

case 3) we have

radius = 6 cm

angle = 85°

area = 23.7 cm 2

Find the area of the sector and then compare with the value of the given area

assume

$\pi=3.14$

substitute the given values

$A_s=\frac{(3.14)(6)^{2}}{360^o}{85^o}$

$A_s=26.7\ cm^2$

The given value of area is not correct

case 4) we have

radius = 7

angle = 75°

area = 32.1 cm 2

Find the area of the sector and then compare with the value of the given area

assume

$\pi=3.14$

substitute the given values

$A_s=\frac{(3.14)(7)^{2}}{360^o}{75^o}$

$A_s=32.1\ cm^2$

The given value of area is correct

5 0

3 years ago

Please help and no links

Klio2033 [76]

Answer:

B) y=3x

Step-by-step explanation:

2 x 3 = 6

3 x 3 = 9

4 x 3 = 12

You can find y by multiplying the x by 3. The relationship between the x and y is proportional. For example, lets say my x is 20, my y would be 60. 20 x 3 = 60.

If you are still unsure, remember constant of proportionality is k=y/x, so your constant is 3.

6 0

2 years ago

Read 2 more answers