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elena-s [515]
3 years ago
11

The maximum speed of the Tupolev Tu-144 airline is 694 m/s. What is this speed in kilometers per hour???

Mathematics
1 answer:
ANEK [815]3 years ago
3 0
There are 60 seconds in 1 minute and 60 minutes in 1 hour.

and there are 1.609km in 1 mile, so, let's use those ratios.

\bf \cfrac{694~\underline{mile}}{\underline{sec}}\cdot \cfrac{60~\underline{sec}}{\underline{min}}\cdot \cfrac{60~\underline{min}}{hr}\cdot \cfrac{1.609~km}{\underline{mile}}\implies \cfrac{694\cdot 60\cdot 60\cdot 1.609~km}{hr}

and I'm sure you know how much that is, since is just a product.
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Simplify <br><br> (1/2)^2 - 6 (2 - 2/3)
elena-s [515]
Exact Form:
-31/4
Decimal Form:
−7.75

Mixed Number Form:
− 7 3/4
8 0
3 years ago
2 2/3 + 3 2/3 add mix numbers
Makovka662 [10]

Answer:

6 1/3

Step-by-step explanation:

(2 2/3) + (3 2/3) = (2 + 3) + (2/3 + 2/3) = 5 + 4/3

= 5 + (1 1/3) = 6 1/3

_____

<em>Comment on the method</em>

Often it works well to add the integer parts and fractional parts separately, then make adjustments in the final result.

You can convert all the numbers to improper fractions, then back:

  = 8/3 + 11/3 = 19/3 = 6 1/3

Doing this requires you to do 3 conversions between mixed numbers and improper fractions, whereas the method shown above only does 1 conversion (at the end).

8 0
3 years ago
The inverse of the logarithmic function
ankoles [38]

Answer:

A=2

B=1

C=0.25

8 0
3 years ago
What is the solution of the equation shown?<br> -1.2(3x - 3) = 4(3x + 0.9)
MariettaO [177]

Answer: x=0

Step-by-step explanation: -1.2(3x-3) = 4(3x+0.9)                                           -3.6x+3.6=12x+3.6                                                                                             -3.6x-12x+12x=12x+3.x+12x                                                                                   -15.6x+3.6-3.6=3.6-3.6                                                                                          -15.6x/-15.6=0/-15.6                                                                                           x=0                          

4 0
3 years ago
Please I have 5 minutes! <br>solve 1/5^2x+10 = 25^3x
TiliK225 [7]

Answer:

-5(3x+4) = 25

-15x-20=25

-15x=25+20

-15x=45

>then divide both side by -15

Therefore: X=-3

4(x+2)-3(2x-4)=10

4x+8-6x+12=10

-2x+20=10

-2x=-10

> divide both sides by -2

Therefore: x= 5

6 0
3 years ago
Read 2 more answers
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