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Alex Ar [27]
2 years ago
12

Find the exact solution of x.

Mathematics
2 answers:
Yuki888 [10]2 years ago
8 0

Answer:

x = +/- square root of 7

Step-by-step explanation:

3x^{2} +7=28\\3x^{2} =21\\x^{2} =7\\x=\sqrt{7} and x=-\sqrt{7}

MA_775_DIABLO [31]2 years ago
4 0

Answer:

the answer is a . hope this helps

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According to Professor Robinson, which of the following aspects of A Streetcar Named Desire can be said to reflect elements of T
natita [175]
The best and most correct answer among the choices provided by the first question is letter E which is all of the above.


On the other hand, the best and most correct answer among the choices provided by the second question is  letter A which is rebirth and coming death.


I hope my answer has come to your help. Have a nice day ahead and may God bless you always!
7 0
3 years ago
if a motercycle is moving at a constant speed down the highway of 40 km/hr, how long would it the motorcycle to travel 10 km
ahrayia [7]

Answer:

15 minutes

Step-by-step explanation:

First, the motorcycle goes at a speed of 40 km/hr.

The question asks for how long it would take to travel 10 km.

Well, there are 60 minutes in an hour, since we will be translating into minutes.

Also, 10 km is 1/4 of 40 km, so it would make sense that the time length would be 1/4 of an hour as well.

1/4 of 60 minutes is 15 minutes.  So it takes 15 minutes for the motorcycle to travel 10 km.

Now, if all this wordy stuff is too much to comprehend, you can also solve using proportional relationships.

\frac{40km}{60min}=\frac{10km}{xmin}

Now cross multiply:

40km*xmin=10km*60min\\40x=600

Divide both sides by 40:

\frac{40x}{40}=\frac{600}{40}\\x=15

Again, this shows that it wouls take 15 minutes for the motorcycle to travel 10 km.

6 0
3 years ago
A rectangular prism has a volume of 729 ft3. The length width and height are all the same. What is the is the length of each sid
swat32

Answer:

9 ft

Step-by-step explanation:

As length, width and height are same, then it is a square prism / cube

Volume of prism = 729 ft³

side³ = 729

side³ = 9³

Side = 9 ft

3 0
3 years ago
Read 2 more answers
PLZ HELP ME!!!!!!!!!!!!!! 20 pOINTS
Bad White [126]

Answer:

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Let l be the length of a diagonal of a rectangle whose sides have lengths x and y, and assume that x and y vary with time. If x
meriva

The rate of change of the size of the diagonal is; 25.2 ft/s

By Pythagoras theorem;

The length, l of a diagonal of a rectangle whose sides have lengths x and y is;

  • l² = x² + y².

In essence; the length of the diagonal is dependent on the length, x and y of the sides.

Therefore;

(dl/dt)² = (dx/dt)² + (dy/dt)²

where;

  • (dx/dt) = 19 ft/s
  • (dy/dt) = -15 ft/s

Therefore,

(dl/dt)² = 19² + (-15)²

(dl/dt)² = 361 + 225

dl/dt = √586

dl/dt = 25.2

Therefore, the size of the diagonal is changing at a rate of; 25.2 ft/s.

Read more;

brainly.com/question/12559989

4 0
2 years ago
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