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
wlad13 [49]
3 years ago
7

What number must you add to complete the square x^2-20x=17

Mathematics
1 answer:
crimeas [40]3 years ago
4 0

(*)\ (a-b)^2=a^2-2ab+b^2



x^2-20x=17\\\\x^2-2\cdot x\cdot10=17\ \ \ |+10^2\\\\\underbrace{x^2-2\cdot x\cdot10+10^2}_{(*)}=17+10^2\\\\(x-10)^2=117


Answer: 10² = 100

You might be interested in
Simplify the expression:<br> ( X + 5)( X-7)
Hitman42 [59]
(x + 5)(x - 7)
x(x - 7) + 5(x - 7)
x(x) - x(7) + 5(x) - 5(7)
x² - 7x + 5x - 35
x² - 2x - 35
7 0
3 years ago
Read 2 more answers
5) Coach Koehler bought supper for all the participating volleyball players after the tournament. The food was ordered from Food
Musya8 [376]

Answer:

25 hamburger

20 hot dogs

Step-by-step explanation:

7 0
2 years ago
Please help ASAP
Arisa [49]

Answer:

2 lessons per day for 27 days and 3 lessons a day for 4 days.

Step-by-step explanation:

66/31 = 2 4/31

Since 66 divided by 31 is 2 with remainder 4, you need to do 31 days of 2 lessons per day. To do the extra 4 lessons, do one more lesson per day for 4 of those days.

That results in:

2 lessons per day for 27 days and 3 lessons a day for 4 days.

Check:

2 lessons a day for 27 days = 2 * 27 = 54

3 lessons a day for 4 days = 3 * 4 = 12

54 + 12 = 66

If you do 2 lessons a day for 27 days and 3 lessons a day for 4 days, you will do the 66 lessons.

5 0
2 years ago
I really need help please !!!
lisov135 [29]

Answer:

15

Step-by-step explanation:

(whole secant) x (external part) = (tangent)^2

(5+x) * 5 = 10^2

Distribute

25 +5x = 100

Subtract 25 from each side

25-25 +5x = 100-25

5x= 75

Divide by 5

5x/5 = 75/5

x = 15

8 0
2 years ago
I need help with question #2. ASAP. Anything is appreciated:)
DedPeter [7]
Y = 4/5x + 30

4/5 because the slope is 4 up, 5 right. 30 is the y-int
4 0
3 years ago
Other questions:
  • 5 to the 4th power times 10 to the 4th power
    14·2 answers
  • . The temperature was 56 degrees this morning but dropped one degree per hour through the rest of the day. Y = - x + 56. (OR, yo
    11·2 answers
  • A skyscraper with 103 floors is 1,133 feet tall. Each floor is the same height. How tall is each floor?
    7·2 answers
  • a contractor charges 1 200 for 100 square feet of roofing installed. At this rate, how much does it cost to have 1,100 square fe
    5·1 answer
  • Please help me!!!!!!
    7·1 answer
  • A watch costs $30. The equation y=30x describes the cost y of x number of watches. Identify the graph of this
    9·1 answer
  • What's 2/9 rounded to the nearest hundredth?
    5·1 answer
  • Need help answer plzzzz ​
    10·2 answers
  • Which of these sums is greater than 1?<br><br> A. 12+23<br> B. 13+18<br> C. 14+25<br> D. 15+110
    15·2 answers
  • your grade varies directly with the time you study if you study for 40 minutes your grade is an 80 how long should you study to
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!