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
Ad libitum [116K]
3 years ago
14

Consider this quadratic equation. 2x2 − 1 = 3x + 4 Which equation correctly applies the quadratic formula?

Mathematics
1 answer:
Mariulka [41]3 years ago
6 0

Answer:

\frac{-(-3)+-\sqrt{(-3)^2-4(2)(-5)}}{2(2)}

Step-by-step explanation:

Quadratic formula: \frac{-b+-\sqrt{b^2-4ac} }{2a}

2x^2-1=3x+4\\\\2x^2-3x-5=0\\\\\\frac{-(-3)+-\sqrt{(-3)^2-4(2)(-5)}}{2(2)} \\\frac{3+-\sqrt{9+40} }{4}

x = \frac{3+-7}{4}

Hope this helps and God bless!

You might be interested in
The end of a hose was resting on the ground, pointing up an angle. Sal measured the path of the water coming out of the hose and
lawyer [7]

Functions can be used to model real life situations.

The hose is 3.2 feet above the ground, at a horizontal distance of 4 fee

The function is given as:

f(x) =-0.3x^2 + 2x

At a horizontal distance of 4 feet, the value of x is 4

i.e. x = 4

Substitute 4 for x in f(x).

So, we have:

f(4) =-0.3(4)^2 + 2(4)

Evaluate the exponent

f(4) =-0.3(16) + 2(4)

Open both brackets

f(4) =-4.8 + 8

Add -4.8 and 8

f(4) =3.2

Hence, the hose is 3.2 feet above the ground

Read more about functions at:

brainly.com/question/10837575

7 0
3 years ago
1. There are apples, bananas, and pears in a basket. The probability of randomly picking an apple is to
Tamiku [17]
Help me I will help you
7 0
4 years ago
on Monday 209 students went on a trip to the zoo. all 4 buses where filled and 9 students had to travel in cars. how many studen
Juli2301 [7.4K]

Answer:

Step-by-step explanation:

7 0
3 years ago
Which equation could be used to solve for the length of side c, given a = 5, b = 12, and C = 72°?
Alona [7]

Answer:

The value of the length of the side C is 11.49.

Step-by-step explanation:

Cosine formula is applicable.

c² = a² + b² -2abcos(C)

substitute the values:

c² = (5)² + (12)² -2(5)(12)cos(72)

= 25 + 144 - 2 (60) (0.309)

= 169 - 37.08

c² = 131.92

square root both sides:

c = sqrt(131.92)

C = 11.49

5 0
3 years ago
What is 2.1x10 to the 3rd power in standard form?
Serjik [45]

Answer:

2.1 x 10^3

Step-by-step explanation: To write a linear expression in standard form, rearrange the terms in alphabetical order. It is already in its standard form.

6 0
3 years ago
Other questions:
  • This is just a square, help​
    14·2 answers
  • Match each root with its meaning.
    14·1 answer
  • Find the common ratio of the sequence. 2, -10, 50, -250, ...
    8·2 answers
  • ARE YOU GOOD AT GEOMETRY??? THEN COME RIGHT HERE AND HELP YOUR DUDE OUT.
    9·1 answer
  • Mrs. Johnson measured 3 rectangular rooms that she wants to tile. What is the total area of the rooms? Hope you guys can see. My
    6·1 answer
  • Suzannah made 7 bows. How many feet of ribbon did she use?
    13·1 answer
  • Which expression is equivalent to 6 (p+5)<br>30+6p<br>30p<br>30+p<br>11p ​
    8·1 answer
  • Solve for f(-3)<br><br> f(x)=5-x<br><br> f(-3)= ?<br> pls helpppp
    12·1 answer
  • Each person in a group buys a movie ticket, a drink, and a popcorn. How much does the group pay when there are 6 people in the g
    15·2 answers
  • What is Y=2000(1.25)^12
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!