1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Zielflug [23.3K]
3 years ago
15

Solve by completing the square 4x^2-30=12+10x

Mathematics
1 answer:
natali 33 [55]3 years ago
5 0
16x - 30 = 12 + 10

6x = 42

x = 7
You might be interested in
Rewrite (123 + 456) + 789 using the Associative Law of Addition
adelina 88 [10]

Answer:

123 + (456 + 789)

Step-by-step explanation:

since this is an addition problem, the parenthesis don't matter, and they can be put wherever you want.

(123 + 456) + 789

123 + 456 + 789

(123 + 456 + 789)

123 + (456 + 789)

technically, any of these would work, but I think the kind of answer the problem is looking for is;

123 + (456 + 789)

5 0
3 years ago
An object has been thrown straight up into the air. The formula h = vt - 16t^2 gives the height of the object above the ground a
Oxana [17]

Answer:

8 seconds.

Step-by-step explanation:

To solve this question, we need to find the time, t, when h = 0, that is, when the height of the object above the ground is 0 feet.

Substituting v = 128 feet per second and h = 0 gives  the quadratic:

0 = 128t - 16t^{2}

Since 128 is divisible by 16, it can be reduced to 0 = 16(8t - t^{2}).

We must now solve for t.

We can easily see that one answer to the equation is 0,

8(0) - (0)^{2} = 0 (we need not concern ourselves with the 16 outside of the parenthesis as in the equation above, since 16 multiplied by 0 is 0). However this is the time the object is released into the air.

The second answer, t = 8 is also easy to see by inspection:

8(8) - (8)^{2} = 0.

Therefore the object lands 8 seconds after it is thrown.

6 0
3 years ago
An airplane climbs at an angle of 13 with the ground . What is the distance it has traveled when it has attained an altitude of
nevsk [136]
The distance traveled is the hypotenuse of the right triangle formed with the ground.

sinα=400/d

d=400/sinα, we are told α=13° so

d=400/sin13 ft

d≈1778ft (to nearest whole foot)
6 0
3 years ago
(2a^2-5)+(3a^2-6a+3)​
Ne4ueva [31]

Answer:

5a^2-6a-2

^^^^

6 0
3 years ago
Are the ratios 4:9 & 12:18 equivalent?
Zigmanuir [339]
No they aren't because they both can't be multiple by the same number
7 0
3 years ago
Read 2 more answers
Other questions:
  • A hypotanuse of a right angle triangle is 13cm if one of the side of the triangle is 1cm shorter than the hypotanuse calculate t
    6·1 answer
  • What is the total area of the two shapes
    6·2 answers
  • Determine the solution set of (x - 4)2 = 12.
    10·1 answer
  • What is the slope? I need help plz
    9·1 answer
  • Grace loves to eat salad! How many salads can she put together if she can choose one from each of the following: two types of le
    11·2 answers
  • Write the prime factorization of each number in exponential notation
    14·1 answer
  • Solve the equation in the interval [0, 2π] <br><br> 2 + Tanθ = 1
    9·1 answer
  • Ok someone make a question that can be represented by 9 divided by 1/3
    11·1 answer
  • A bouquet of flowers contains D daisies and T tulips and contains a total of F flowers. The number of daisies is two more than t
    8·2 answers
  • Plot 1<img src="https://tex.z-dn.net/?f=%5Cfrac%7B2%7D%7B5%7D" id="TexFormula1" title="\frac{2}{5}" alt="\frac{2}{5}" align="abs
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!