3 years ago

What is the sum of 2.5 x 10^4 and 3.4 x 10^4

Mathematics

1 answer:

navik [9.2K]3 years ago

3 0

5.9 x 10^4

59000

That is the answer C

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What is the answer. Evalute (2/3)2. Thank you

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Answer:

4/3

Step-by-step explanation:

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Can someone plz help me solved this problem I need help plz help me! Will mark you as brainiest!

I am Lyosha [343]

Answer:

13 l of 15%, 13 l of 25%, 26 l of 70%

Step-by-step explanation:

solutions:

15%, 25% and 70%

final solution:

52 l of 45%

This includes 0.45*52l= 23.4 l acid

Let's assume:

amount of 15% solution= x
amount of 25% solution= y
amount of 70% solution= z
and we have z=2y

so there are 2 equation:

x+y+z=52

0.15x+0.25y+0.7z=23.4

x+y+2y= 52 ⇒ x+3y= 52 ⇒ x= 52- 3y

0.15x+0.25y+1.4y=23.4

0.15x+1.65y=23.4
0.15*(52-3y)+1.65y=23.4
7.8-0.45y+1.65y=23.4
1.2y=23.4-7.8
1.2y= 15.6

y=15.6/1.2
y= 13 l

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x= 52- 3*13= 13 l
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Rin incorrectly calculated the mean absolute deviation for the data set 25,25,31,36,38.Her work is shown here. 1. Find the mean.

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In Step 3 was Her Mistake

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18 divide by 2 * 3/5-2 simplify show all work

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Answer:

Step-by-step explanation:

I would guess it looks like this - if not then tell me

$\frac{18}{ \frac{2 \times 3}{5 - 2} }$

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Then there's only

$\frac{18}{ \frac{6}{3} }$

Which is equal to

$\frac{18}{1} \times \frac{3}{6} = \frac{54}{6} = \frac{9}{1} = 9$

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Bas_tet [7]

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4n - n = 13 + 8
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n = 21/3
n = 7....the number(n) = 7

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3 years ago