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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! :)

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Read 2 more answers

. Three types of shirts sold at a store cost $9.00, $11.00, and $12.50. One day, the store sells a total of 23 shirts and makes

lbvjy [14]

Answer:

X + 3y = 23

9x + 36y = 243

11 shirts sold at $9.0 per shirt, 4 shirts sold at $11 per shirt and 8 shirts sold at $12.5 per shirt

Step-by-step explanation:

-----Since we are told to assume that the number of shirts sold for $9.00 each is x, that of $11.00 is y and also that of $12.50 is z.

9x + 11y + 12.5z = 243

9x + 11y + 12.5(2y) = 243

9x + 36y = 243_______ equation 1

----- The statement also read that One day, the store sells a total of 23 shirts and makes $243 on the sales. TWICE AS MANY SHIRTS WERE SOLD FOR $12.50 THAN WERE SOLD FOR $11.00

Z = 2y

x + y + z = 23

X + y + 2y = 23

X + 3y = 23_____ equation 2

Now multiply the above by 9 to have this equation's "x" sharing the same coefficient with that of equation 1

9x + 27 = 207 will be the new one___equation 3

-----Subtract equation 3 from 1 and we have

9x + 36y = 243____ equation 1

9x + 27y = 207____ equation 3

9y = 36

Y = 4

-----Substitute y = 4 in equation 2

X + 3y = 23

X + 4(3) = 23

X + 12 = 23

X = 23 - 12

X = 11

-----Remember that x + y + z = 23

11 + 4 + z = 23

15 + z = 23

Z = 23 - 15

Z = 8.

So therefore, x =11 shirts, y = 4 shirts and z = 8 shirts

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3 years ago