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babymother [125]
2 years ago
8

PLEASE HELP!!!!!! ILL GIVE BRAINLIEST *EXTRA 40 POINTS** !! DONT SKIP :((

Mathematics
1 answer:
Ugo [173]2 years ago
5 0

Answer:

the answer is yes

Step-by-step explanation:

2x + 4y = 6

when x =9 and y = -3

2(9)+4(-3) = 6 ✔

6x+14y = 12

6(9) + 14(-3) = 12 ✔

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Answer this question please; number 5... show all work thank you
My name is Ann [436]

Answer:

rate of the plane in still air is 33 miles per hour and the rate of the wind is 11 miles per hour

Step-by-step explanation:

We will make a table of the trip there and back using the formula distance = rate x time

                 d              =            r       x       t

there

back

The distance there and back is 264 miles, so we can split that in half and put each half under d:

               d            =         r        x        t

there    132

back     132

It tells us that the trip there is with the wind and the trip back is against the wind:

           

              d           =        r         x        t

there     132        =    (r + w)

back      132       =     (r - w)

Finally, the trip there took 3 hours and the trip back took 6:

           

             d         =        r        *        t

there    132     =    (r + w)     *       3

back     132     =    (r - w)      *       6

There's the table.  Using the distance formula we have 2 equations that result from that info:

132 = 3(r + w)        and        132 = 6(r - w)

We are looking to solve for both r and w.  We have 2 equations with 2 unknowns, so we will solve the first equation for r, sub that value for r into the second equation to solve for w:

132 = 3r + 3w and

132 - 3w = 3r so

44 - w = r.  Subbing that into the second equation:

132 = 6(44 - w) - 6w and

132 = 264 - 6w - 6w and

-132 = -12w so

w = 11

Subbing w in to solve for r:

132 = 3r + 3(11) and

132 = 3r + 33 so

99 = 3r and

r = 33

7 0
2 years ago
2+7x1232 = what pls help its matth
erica [24]

Answer:

8626

Step-by-step explanation:

use a calculator in instead of here this was a EZ question but thanks for the points and if you have a harder question i'll be waiting

8 0
2 years ago
Read 2 more answers
This is the countiue question to the last one I posted. so please help ​
Vedmedyk [2.9K]

Answer:

4.5 i think

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Help for brainliest and 10 points
Travka [436]

Answer:

-3

Step-by-step explanation:

0.002 = 2 \times  {10}^{ - 3}  \\  \implies \: x =  - 3

4 0
2 years ago
I'm stuck- lol. I'll give brainliest to the first correct answer! :D
polet [3.4K]

Answer:

Its 4:)

Step-by-step explanation:

8 0
3 years ago
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