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
dimulka [17.4K]
3 years ago
15

X2 + 4x - 21 = 0 quadratic formula

Mathematics
1 answer:
Elena-2011 [213]3 years ago
6 0

Answer:

0

Step-by-step explanation:

x2 +4x-21=0. solve for x

x =  \frac{7}{2}

x = 3 \frac{1}{2}  \ x = 3.5

You might be interested in
so, im t trying to find the original price and sale price of a book for example and the amount of discount is 2.80 dollars and t
aliya0001 [1]

Okay, so since the discount is 60% of the price and it comes out to $2.8, we are going to form the following expression, where x is the original price.

60% of x = 2.8

Simply means: 60/100 * x = 2.8

You solve for x, which comes out to $4, which is your original price.


5 0
3 years ago
Evaluate (3n+2) -10 when n=3 !!!!
Crazy boy [7]

Hello!

(3n + 2) - 10 =

= (3 × 3 + 2) - 10 =

= (9 + 2) - 10 =

= 11 - 10 =

= 1

Good luck! :)

3 0
3 years ago
Read 2 more answers
Linda rides her bike at a constant rate of 2 miles every 5 minutes. What is the slope of this proportional relationship?
Ne4ueva [31]

Answer:

10???

Step-by-step explanation:

4 0
3 years ago
Edgar is walking 0.5 m/s toward the back of a train that is traveling forward at
Ilya [14]
Answer:

12.


Explanation:

6.0m/s devide it by 0.5m/s is 12.

Hope it helps. Please mark me as brainliesttt
6 0
3 years ago
PLS HELP!!!!!!!!!!!!!!!!!!!
Basile [38]

Answer:

y=-x :)))) hope this helps!

5 0
3 years ago
Read 2 more answers
Other questions:
  • F(x) = 5x-2, find f(-3/5) what is the output of the given input
    9·1 answer
  • The total cost of all of the ingredients for her cakes is $62<br> She will sell each cake for $10
    11·1 answer
  • Circle the vertex of the angle.
    11·1 answer
  • Which statement correctly compares the weight of a newborn beluga and newborn muskox
    13·1 answer
  • you created a new playast, and 100 of your friendslistened to it and shared if theyliked the new or not, Nadhil said the ratio o
    12·1 answer
  • How do you write 2/20 as a percentage ​
    6·1 answer
  • The radius of a circular clock is 10,5 inches. Which measurement is closest to the circumference of the clock in inches?
    12·1 answer
  • Solve the system by substitution <br><br> Y= -7x + 6 <br> Y = - 10x<br><br><br> Plz help
    11·2 answers
  • Solve each equation
    7·1 answer
  • NEED HELP!! ASAP!!!!!!!!!
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!