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
lisov135 [29]
4 years ago
15

7x^2-16x-28=0, what’s the answer

Mathematics
1 answer:
slava [35]4 years ago
3 0
Answer:
The solutions of the equation are \frac{8+2 \sqrt{65} }{7} and \frac{8-2 \sqrt{65} }{7}

Explanation:
The general form of the quadratic equation is:
ax² + bx + c = 0
The given equation is:
7x² - 16x - 28 = 0

By comparing:
a = 7
b = -16
c = -28

Now, to get the roots, we will use the quadratic formula shown in the attached image.

Substitute with the values of a, b and c and calculate the corresponding roots.

You will get the roots:
\frac{8+2 \sqrt{65} }{7} and \frac{8-2 \sqrt{65} }{7}

Hope this helps :)

You might be interested in
Which expression represents 36x^2-100y^2 factored completely
Citrus2011 [14]
36 and 100 are both perfect squares
the factorization of x^2-y^2 is (x+y)(x-y)
substitute x^2 with 36x^2 and y^2 with 100y^2:
<span>36x^2-100y^2=
(6x+10y)(6x-10y) or 
4(3x+5y)(3x-5y)</span>
7 0
3 years ago
Beard bought 10 acres of land.She plans to divide the land into smaller lots that are each 1/20 of an acre.How many smaller lots
stich3 [128]

Answer:She will have:

N = 200 smaller lots

Step-by-step explanation: N = (total acres of land) / (smaller lots of land)

Substituting the values we have:

N = 10 / (1/20)

Rewriting we have:

N = 10 * 20

N = 200 lots

7 0
3 years ago
pls help ASAP will give brainlist
Oksana_A [137]

Answer:

The length of each side of the base must be 6.

Step-by-step explanation:

Total volume = 396

Volume = Length x width x height

We know height = 11

So,

11 x Length x Width = 396

396 / 11 = 36

Length x Width = 36

This is a square prism so all sides of base are equal.

Length = 6

Width = 6

And therefore all the other sides of the base are also 6.

7 0
3 years ago
What is the sum of -6 4/5 and 6 4/5​
galben [10]

Answer:

0

Step-by-step explanation:

thanks for the points :)

4 0
3 years ago
Dree rolls a strike in 6 out of the 10 frames of bowling
tigry1 [53]
There’d be 4 more frames because he rolled 6 and 4+6 = 10
5 0
3 years ago
Other questions:
  • If two tangent segments to a circle share a common endpoint outside a circle, then the two segments are
    11·1 answer
  • What is the median of this set of data? 1, 2, 5, 6, 9 1 5 8 9
    8·2 answers
  • Point D is located at (-13,-1).point Q is located at (0,12). Determine the slope intercept equation of line DQ
    13·1 answer
  • What is the range of the data?
    15·2 answers
  • Solve for y: 8x - 3y = 17
    7·1 answer
  • James is 46 years old. This is uncle john's age divided by 2, plus 14 years. how old is uncle John?
    7·1 answer
  • Consider the following algebraic statements and determine the values of x for which each statement is true. One a number line, s
    12·1 answer
  • I really need the answers please help asap
    7·1 answer
  • Write an equivalent system of equations to the following of equations: 2x+2y=-6 and x-4y=2​
    7·1 answer
  • A tourist in France wants to visit 12 different cities. How many different routes are possible?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!