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
Veronika [31]
3 years ago
5

Solve the equation. 2x^2+7=15x

Mathematics
1 answer:
77julia77 [94]3 years ago
3 0
2x^2+7=15x \\
2x^2-15x+7=0\\
2x^2-x-14x+7=0\\
x(2x-1)-7(2x-1)=0\\
(x-7)(2x-1)=0\\
x=7 \vee x=\frac{1}{2}

You might be interested in
Find the value of x in the isosceles triangle shown below
egoroff_w [7]

Answer:

x = 10

Step-by-step explanation:

if there 2 same triangle then they are right triangle

By using Pythagorean theorem for 1 of right triangle, we have

\sqrt{74} ^{2} = 7^{2} + (\frac{x}{2}) ^{2}

74 = 49 + \frac{x^{2}}{4}

74 - 49 = \frac{x^{2}}{4}

25 = \frac{x^{2}}{4}

therefore, x = \sqrt{25*4} = \sqrt{100} = 10

6 0
2 years ago
Read 2 more answers
A ball is thrown straight out at 80 feet per second from an upstairs window that's 15 feet off the ground. Find the ball's horiz
Alex73 [517]

Answer:

Step-by-step explanation:

In order to find the horizontal distance the ball travels, we need to know first how long it took to hit the ground. We will find that time in the y-dimension, and then use that time in the x-dimension, which is the dimension in question when we talk about horizontal distance. Here's what we know in the y-dimension:

a = -32 ft/s/s

v₀ = 0 (since the ball is being thrown straight out the window, the angle is 0 degrees, which translates to no upwards velocity at all)

Δx = -15 feet (negative because the ball lands 15 feet below the point from which it drops)

t = ?? sec.

The equation we will use is the one for displacement:

Δx = v_0t+\frac{1}{2}at^2 and filling in:

-15=(0)t+\frac{1}{2}(-32)t^2 which simplifies down to

-15=-16t^2 so

t=\sqrt{\frac{-15}{-16} } so

t = .968 sec (That is not the correct number of sig fig's but if I use the correct number, the answer doesn't come out to be one of the choices given. So I deviate from the rules a bit here out of necessity.)

Now we use that time in the x-dimension. Here's what we know in that dimension specifically:

a = 0 (acceleration in this dimension is always 0)

v₀ = 80 ft/sec

t = .968 sec

Δx = ?? feet

We use the equation for displacement again, and filling in what we know in this dimension:

Δx = (80)(.968) +(0)(.968)^2 and of course the portion of that after the plus sign goes to 0, leaving us with simply:

Δx = (80)(.968)

Δx = 77.46 feet

5 0
3 years ago
Jeremiah conducts a survey and finds that as the first variable in his survey increases, the
lapo4ka [179]

Answer:

Negative Association.

Step-by-step explanation:

Association between variables:

Association between variables can be classified as positive or negative.

Positive: Both move in the same direction, that is, either both increase or both decrease.

Negative: The variables move in opposite directions, one increases and the other decreases.

In this question:

As the first increases the second decreases, that is, they move in opposite directions, so it is a Negative Association.

4 0
3 years ago
Books are packed into boxes of 90. 23 boxes on 1 crate. How many crates will be needed to pack 270000 books.
agasfer [191]

Answer:

130 crates

Step-by-step explanation:

270,000/90=3000/23

3000/23=130.43

rounded: 130 crates

6 0
2 years ago
Please help me. this is trig and all I need is an explanation on how to start
nikklg [1K]

Step-by-step explanation:

Hypotenuse : Opposite the right angle.

Opposite : Opposite the angle.

Adjacent : the last side left.

Your formulas.

Soh Cah Toa (Sin Cos Tan)

You'll be using Cos (Cah) because hypotenuse and adjacent are the only sides with something in it.

You rearranged formula :

Side length × Cos (Angle) = your answer to x

7 0
2 years ago
Other questions:
  • The length of a rectangle is twice its width. the perimeter of the rectanhle i 126 feet
    12·1 answer
  • The sum of 5 consecutive integers is 505.
    7·1 answer
  • What’s the answer to 10(x-2)-3 (x+3)
    10·1 answer
  • In ΔABC, m∠B = 90°, , and AB = 26 units.Based on this information, m∠A = °, m∠C = °, and AC = units.
    7·1 answer
  • What ratio is not equivalent to 5:8
    8·1 answer
  • Give the first 4 terms of a sequence who has the explicit formula an = 4n – 13
    12·1 answer
  • 9 >d, if d=3. It will mean a lot to me if you could answer it
    13·1 answer
  • ASAP PLZZ HELP BRAINLEST TO THE BEST ANSWER IF YOU DONT KNOW DONT ANSWERRRRRRRRR
    10·2 answers
  • Which expression is equivalent to (2x^2 +3)(x+4)???​
    5·2 answers
  • I cant figure out this project to save my life anyone able to help me?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!