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
stealth61 [152]
4 years ago
9

Solve this quadratic equation by completing the square. x2 + 10x = 13

Mathematics
1 answer:
otez555 [7]4 years ago
7 0
Take 1/2 of 10
10/2=5
square it
5^2=25

add to both sides
x^2+10x+25=13+25
factor perfec squaer
(x+5)^2=38
sqrt both sides
x+5=+/-√38
minus 5
x=-5+√38 or -5-√38
You might be interested in
Raziel walks 3 m north, 5 m east, 3 m south, and 5 m west. What is the total distance Raziel traveled? (Include
blsea [12.9K]

Answer:

16 metres

Step-by-step explanation:

You're finding the perimetre of this rectangle, so have to add each side together to find the total distance he traveled (the perimetre of the rectangle, since he travelled in a rectangle).

3*2 is 6,

5*2 is 10

10 + 6 is 16.

Have a wonderful day, my friend.

4 0
3 years ago
ZA and ZB are supplementary angles. If mZA = (5x + 25)° and m
liberstina [14]

Answer:

MZA = 140

Step-by-step explanation:

5x+25°+ x + 17°=180°(Supplimentary Angles)

6x + 42° =180°

6x =180 - 42

6x=138

(divide by 6 both sides)

X= 23

substitution X into the given angle

5x +25

5(23)+25

115+25

140

3 0
3 years ago
A piece of string of length 85 cm is divided into three pieces in the ratio 2 : 3 : 5. Calculate the length of the
Galina-37 [17]

Answer:

a=2/10 x85

=17cm

b.3/10 x 85

=25.5cm

c.5/10 x 85

=42.5cm

the shortest piece is 17cm

Step-by-step explanation:

8 0
3 years ago
According to the CDC, the rate of Cesarean births in the United States in 2013 was about 33%. Suppose a random sample of 200 bir
sergij07 [2.7K]

Answer:

n = 200

p = 0.33.

Step-by-step explanation:

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

In this problem we have that:

33% of the births are Cesarean, so p = 0.33

Sample of 200 births, which eans that, n = 200

7 0
3 years ago
Find the missing supplementary angle.
SpyIntel [72]
50 degrees I’m guessing is the answer
6 0
3 years ago
Other questions:
  • N the situation, simple interest is calculated yearly.
    6·1 answer
  • Nick has $7.00. Bagels cost $0.75 each and a small container of cream cheese costs $1.29. Write an inequality to find the number
    15·1 answer
  • How to add and subtract rational numbers
    10·1 answer
  • The area of a rectangle is represented by x^2 - 5x - 14. what are the dimensions?
    10·1 answer
  • Farmer Ellie has another circular field for crops. This one has a diameter of 35 meters. What is the area of the field?
    14·1 answer
  • The two figures shown are congruent. Which statement is true?
    6·1 answer
  • I need the answer for these questions please my mom is at work and cannot help me
    13·1 answer
  • Erik read a total of 4 books over 2 months. After belonging to the book club for 17 months, how many books will Erik have read i
    5·1 answer
  • 9. A waffle iron can make a waffle in 4 minutes. How many waffles can be made in an hour?​
    12·2 answers
  • The fastest helicopter in the world is the CH-47F Chinook, with a maximum speed of 315 km/h. What distance can it fly in 12 minu
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!