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
fgiga [73]
3 years ago
7

How to solve 2x²-8x-90=0

Mathematics
1 answer:
8090 [49]3 years ago
4 0
А=2
b=-8
c=-90
D=b^2-4ac
D=64+720
D=784=28^2
X1,2=(-b-+D):2a
Х1,2=(8+-28):4
Х1=-5
Х2=9
You might be interested in
Anybody please ? Thanks.
julsineya [31]

Answer:

Step-by-step explanation:

Hey i think ur answer is C

3 0
3 years ago
Read 2 more answers
Explain why an elevator with 3 people in it is less dense with an elevator with 50 people in it
Harrizon [31]

Answer:

  it has a lower mass/volume ratio

Step-by-step explanation:

Density is the ratio of mass to volume. An elevator will have the same volume, regardless of the number of people. The mass will increase with the number of people.

An elevator with 50 people in it will have a higher mass/volume ratio than an elevator with 3 people in it. Hence the latter is less dense.

__

<em>Additional comment</em>

50 persons would require an industrial elevator of perhaps 10,000 pound load capacity. There might be safety issues with carrying that many people.

7 0
3 years ago
The front part of a tent had the dimensions shown in a diagram.What is the area of this part of the tent
attashe74 [19]
The area of this of the tent is 20
3 0
3 years ago
Read 2 more answers
I need help fast please <br><br>Solve this and show steps <br><br>4.5×8-(0.4+9.6-(3.6-1.8))<br>​
valentina_108 [34]

Answer:

27.8

Step-by-step explanation:

You need to do brackets first

3.6-1.8 = 1.8

Then substitute

4.5 x 8- (0.4 + 9.6- 1.8)

0.4+9.6-1.8=8.2

4.5 x 8 - 8.2 =27.8

7 0
2 years ago
Larry says 5×900 is less than 5×9000 is greater than 9000​
Ne4ueva [31]

Answer:

???? i dont understand

Step-by-step explanation:

i think yes

6 0
3 years ago
Other questions:
  • Find the solution of this system of equations. Separate the x- and y-values with a comma. x - 2y = 9 and x - y = 11
    14·1 answer
  • A restaurant cook earns $8 per hour for the first 40 hours worked and $12 per hour for over time (hours worked in addition to th
    9·1 answer
  • Translate the word phrase into an algebraic expression.
    8·1 answer
  • What is the median of this distribution?
    10·2 answers
  • You pay 5$ and 10$ to begin a membership. You need to spend at least 50$. Write an inequality.
    5·1 answer
  • There is 3 and 1/2 Cupid of rice. A serving of 2/3. How many servings or rice are made
    10·1 answer
  • Solution of <br> y=2x^3-4x^2+3x-1
    10·1 answer
  • \ sqrt {x ^ 2 + 4x + 7} = \ sqrt {x ^ 2-2x + 4
    7·1 answer
  • You woke up at 9:00 am 5 hours later still doing school work then you took a nap for 2 hours what time was it is when you woke u
    5·1 answer
  • 40 points :) Please help me
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!