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
kvv77 [185]
3 years ago
5

Factor 2x^2-4x-30 completely. A. 2(x-5)(x+3) B. (2x-5)(x+3) C. (2x+3)(x-5) D. 2(x-3)(x+5)

Mathematics
1 answer:
OLEGan [10]3 years ago
4 0

Answer:

<h2>2(x - 5)(x + 3)</h2>

Step-by-step explanation:

2x^2-4x-30\\\\=2\cdot x^2-2\cdot2x-2\cdot15\\\\=2(x^2-2x-15)\\\\=2(x^2+3x-5x-15)\\\\=2[x(x+3)-5(x+3)]\\\\=2(x+3)(x-5)

You might be interested in
How long is a guy wire reaching from the top of a 6ft. Pole to a point on the ground 4ft. From the pole
LenKa [72]

Answer:

The guy wire is 7.2111 ft long

Step-by-step explanation:

Notice that we are in the presence of a right angle triangle formed by: the height (the standing 6 ft pole), the base (the distance from the pole to the anchoring point on the ground), and the actual guy wire. See attached image for reference.

Notice that since pole and ground are perpendicular to each other (at 90 degrees) , the guy wire forms what is called the "hypotenuse" (longest side) of the right angle triangle. We can therefore use the Pythagorean Theorem to solve this problem with the formula for the hypotenuse:

Hypotenuse=\sqrt{side1^2 +side2^2} \\Hypotenuse= \sqrt{6^2+4^2}\\Hypotenuse=\sqrt{36+16} \\Hypotenuse=\sqrt{52} \\Hypotenuse=7.2111\, ft

5 0
3 years ago
State the domain for the set of points.<br> {(8, 8), (5, 7), (-4, 8), (4, 8)}
exis [7]

Answer:

(8, 5, -4, 4)

Step-by-step explanation:

The domain is basically the input or x coordinate. The x coordinates of the points are 8, 5, -4, and 4. Therefore, the domain is 8, 5, -4, and 4.

8 0
3 years ago
A chemist is using 327 milliliters of a solution of acid and water. If 13.1% of the solution is acid, how many milliliters of ac
fgiga [73]

Answer:

42.837 milliliters

Step-by-step explanation:

327 x 0.131 = 42.837

3 0
3 years ago
My chemistry book is 8 years older than my Algebra book. In 6 years the chemistry book will be twice as old as the Algebra book.
4vir4ik [10]

Answer:

x + 14 = 2(x + 6)

x = 2

Step-by-step explanation:

Let

Algebra book age = x

Chemistry book age = x + 8

In 6 years time

Chemistry book age = x + 8 + 6

= x + 14

Algebra book age = x + 6

the chemistry book will be twice as old as the Algebra book.

x + 14 = 2(x+6)

x + 14 = 2x + 12

x - 2x = 12 - 14

- x = - 2

Divide both sides by -1

x = 2

Check:

Chemistry book age = x + 14

= 2 + 14

= 16

Algebra book age = x + 6

= 2 + 6

= 8

6 0
3 years ago
Tito drives his car and covered a distance of 225 kilometers in 7.5 hours. What is the average in kilometers per hour?
Eva8 [605]

Step-by-step explanation:

I hope u are asking for average speed

average speed = total distance/total time

= 225/7.5

= 30 km/h or 30 km per hour

6 0
2 years ago
Read 2 more answers
Other questions:
  • Express 15x^1/3 y^1/5 using a radical
    5·1 answer
  • How much did Briana save by purchasing a backpack that costs $45 with a sales promotion of 20% off instead of a backpack that co
    15·2 answers
  • a dust is 1.5 ft wide and 5 feet long it is 3 feet above the floor what is the volume of the space under the desk
    9·1 answer
  • Ethan had planned to visit his local post office to change 400 pound into euros exchange rate was £1 to 1.25 euros however the p
    7·2 answers
  • Which of the following numbers is
    11·1 answer
  • −30=5(x+1) what is the answer?
    14·2 answers
  • Max's town voted on a new speed limit. Of the votes received, 576 were in favor of the new speed limit and 64 were opposed. What
    5·1 answer
  • A circle has a circumference of 1,133.54 units.What is the diameter of the circle?
    10·1 answer
  • Can someone help me with this!!
    9·1 answer
  • Which choice is equivalent to the expression below?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!