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
REY [17]
3 years ago
15

Solve the quadratic equation by completing the square. 4x2 + 8x - 7 = 0

Mathematics
1 answer:
padilas [110]3 years ago
5 0

Step-by-step explanation:

4x² + 8x − 7 = 0

4x² + 8x = 7

x² + 2x = 7/4

x² + 2x + 1 = 11/4

(x + 1)² = 11/4

x + 1 = ±√(11/4)

x = -1 ± √(11/4)

You might be interested in
Anyone know this and can help?!
DENIUS [597]

Answer:

65.4°

Step-by-step explanation:

According to question

The equation is

Cos(x)=5/12

x=acos(5/12)

x=65.4°

7 0
3 years ago
What is the missing number in the list of perfect squares 1,4,9,16,25,36,49,_,81,100,121,144
Yuri [45]

Answer:

64

Step-by-step explanation:

49= 7*7

81=9*9

8*8=64

3 0
3 years ago
Read 2 more answers
Time sensitive question. Find the sum of the first 26 terms of an arithmetic series whose first term is 7 and 26th term is 93.
lisabon 2012 [21]

ANSWER

S_{26}=1300

EXPLANATION

The sum of an arithmetic sequence whose first term and last terms are known is calculated using

S_{n}= \frac{n}{2} (a + l)

From the given information, the first term of the series is

a = 7

and the last term of the series is

l = 93

The sum of the first 26 terms is

S_{26}= \frac{26}{2} (7 + 93)

S_{26}= 13 (100)

S_{26}=1300

7 0
3 years ago
Player 1 a $100 bill, and player 1 must hide it in one of the four boxes. player 2 does not observe where player 1 hides the $10
Trava [24]
Foxy get uu Georgia’s g hug hug wugsuilgareu ha GWU Gagarin
4 0
3 years ago
C=5(y-8) solve for y
Sloan [31]

Answer:

The steps to do this :

c = 5(y - 8)

c = 5y - 40

c + 40 = 5y

y =  \frac{c + 40}{5}

7 0
3 years ago
Read 2 more answers
Other questions:
  • -5x+y=6<br> -3x+6y=-12<br> Solving systems of equations by substitution
    5·1 answer
  • What is the standard equation for a circle with the center (2,1) and passing through (0, 1)
    13·2 answers
  • Square root of 23 + 7
    5·1 answer
  • What is the distance between the points
    9·1 answer
  • A 1-unit by 3-unit rectangle is shown below. what is the area of the shaded rectangle?
    13·1 answer
  • -2x + 5y=12 for y helpp plsss
    15·2 answers
  • Simplify <br> 12 (6) - 7 (2) + (6-3)
    14·2 answers
  • sam purchased 5 raffle tickets a total of 120 raffle tickets were sold what is the probability that one of sams tickets will be
    7·1 answer
  • Use the graph at the right. If the
    11·1 answer
  • NEED HELP ASAP PLEASEEEEEEE
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!