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pishuonlain [190]
3 years ago
14

2.2.3 + 5.68 + 21.047=

Mathematics
1 answer:
Oksana_A [137]3 years ago
6 0

Answer:

22.3 + 5.68 + 21.047= 49.027

2.23 + 5.68 + 21.047= 28.957

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Lauren can drive her car 320 miles on 10 gallons of gasoline. Melissa can drive her car 280 miles on 8 gallons of gasoline. Who
Assoli18 [71]

how many miles on 1 gallon?

Lauren: 320/10=32

Melissa:280/8=35

Who Drove farther?

32*40=1280

35*40=1400

Melissa can drive farther

4 0
3 years ago
PLEASE HELP ME WITH IT.
scoundrel [369]

OK.  I did it.  Now let's see if I can go through it without
getting too complicated.

I think the key to the whole thing is this fact:

     A radius drawn perpendicular to a chord bisects the chord.

That tells us several things:

-- OM bisects AB. 
   'M' is the midpoint of AB.
   AM is half of AB.

-- ON bisects AC.
    'N' is the midpoint of AC.
   AN is half of AC.

--  Since AC is half of AB,
     AN is half of AM.
     a = b/2 

Now look at the right triangle inside the rectangle.
'r' is the hypotenuse, so

                                            a² + b² = r²

But  a = b/2, so             (b/2)² + b² = r²

(b/2)² = b²/4                   b²/4   + b² = r²

Multiply each side by 4:     b² + 4b² = 4r²
                                       -  -  -  -  -  -  -  -  -  -  -
                                            0  + 5b² = 4r²  
Repeat the
original equation:                a² +  b² =  r²

Subtract the last
two equations:                  -a² + 4b² = 3r² 

Add  a²  to each side:              4b²  =  a² + 3r² .    <=== ! ! !
 
7 0
3 years ago
Can you please help me with number 1 and 2 thank you
azamat
For number 1,

he is able to mow 3 lawns for every 1 hour so

0hrs=0 lawns

1hrs=3 lawns

2hrs= 6 lawns

3hrs= 9 lawns
8 0
4 years ago
Is 5 a rational number or an irrational number?
nasty-shy [4]

Answer:

It is a rational number

Step-by-step explanation:

7 0
4 years ago
Read 2 more answers
The graph of y=x^2 and y=cosx intercept in how many points?
Over [174]
They intercept in two points.

The graph y=x^2 is very basic so I suppose you know how it looks like.
It's like a U and starts from the origin (0,0)

The graph y=cosx is similar to y=x^2 but in a different way.
y=cosx doesn't pass from (0,0) it passes from (0,1) and then to (-1,0) and (1,0).
Basically, it goes like this..
~

If you know how the two graphs look like then you can understand why they intercept only two times.

3 0
3 years ago
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