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Delvig [45]
3 years ago
15

Which statement makes the best open sentence 12 + 3x = 30 true?

Mathematics
1 answer:
Elena L [17]3 years ago
5 0

The equation 12+3x=30 can be solved by the following

12+3x=30

First subtract 12 from both sides making the equation

3x=18

Now divide 3 from both sides

x=6

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Parabola passes through the points (0,5), (1,4), and (2,5). What function does the graph represent?
AfilCa [17]

Answer:

x^2 - 2x + 5 = 0.

Step-by-step explanation:

The (0, 5) is the point where the parabola passes through the y axis (where x = 0), so we can write the equation as

y = ax^2 + bx + 5   where a and b are constants to be found.

Also, since (1, 4) and (2, 5) are points on the curve, substituting, we have the system:

a(1)^2 + 1b + 5 = 4

a(2)^2 + 2b + 5 = 5

Simplify these 2 equations:

a  + b  =  -1  .................(1)

4a + 2b = 0..................(2)

Multiply the first equation by -2:

-2a - 2b = 2 .................(3)

Add (2) + (3):

2a = 2

a = 1.

Substitute a = 1 into (2):-

4*1 + 2b = 0

2b = -4

b = -2.

7 0
3 years ago
(NEED HELP WILL MARK BRAINLIEST)
Basile [38]

Answer:

All of the above

Step-by-step explanation:

Also, this is a history, not a maths problem

6 0
3 years ago
S is inversely proportional to t.<br>When s<br>0.4, t = 4<br>Work out s when t = 0.8​
Yuliya22 [10]
S = 2

0.4x4 = 1.6
1.6/0.8 = 2
3 0
3 years ago
. <br><br><br> Solve the equation. <br><br> 2/3 x – 6 = 9
Allisa [31]
Hey there!

Okay let's get cracking :D

The equation is....  (2x/3) - 6 = 9

2x/3 = 15
2x = 45
<u>x = 22.5</u><u />    <----- And that is your answer!

I hope it helped! 

<u>Please vote for me as Brainliest if there is a second answer!</u>
4 0
3 years ago
Read 2 more answers
A tree that is 5 feet tall is growing at a rate of 1 foot per year. A 6 foot tall tree is growing at a rate of 0.5 foot per year
vovangra [49]

Both trees would be the same in 2 years at 7 feet.

Hope this helps.

8 0
3 years ago
Read 2 more answers
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