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
Inessa05 [86]
3 years ago
5

Solve by completing the squarex squared +14x - 51=0

Mathematics
1 answer:
Nesterboy [21]3 years ago
3 0
x^2 +14x - 51=0\\ \\\Delta = b^{2}-4ac =14^{2}-4*1*(-51)=196+204=400 \\ \\x_{1}=\frac{-b-\sqrt{\Delta }}{2a} =\frac{-14- \sqrt{400}}{2}=\frac{-14-20}{2}= \frac{-34}{2}=-17\\ \\x_{2}=\frac{-b+\sqrt{\Delta }}{2a} =\frac{-14+ \sqrt{400}}{2}=\frac{-14+20}{2}= \frac{6}{2}=3


You might be interested in
How much more area does a large pizza with a 12 in. diameter have than a small pizza with an 8 in. diameter? Round your answer t
ivolga24 [154]

Answer: About 63 in²

Step-by-step explanation:

<u>Area of circle = π · r²</u>

  • r = radius length
  • π ≈ 3.14

<u>Area of large pizza:</u>

\pi *r^{2} =3.14*6^{2} =3.14*36=113.04

<u>Area of small pizza:</u>

\pi *r^{2} =3.14*4^{2} =3.14*16=50.24

<u>Difference in area:</u>

113.04-50.24=62.8

4 0
2 years ago
What a Expression that has a value -8
kirill [66]

Answer:

(-4+2*2)+8

Step-by-step explanation:

2*2=4

-4+4= 0

0+8= -8

5 0
3 years ago
Read 2 more answers
Diameter Radius Area Circumference of= 132
AveGali [126]

Answer:

lets \:  \: find \:  \:  \: the \:  \:  \: radius \\ 2\pi \: r = 132 \\   \frac{2\pi \: r}{2\pi}  =  \frac{132}{2\pi}  \\ r = 21.01

lets \:  \:  \: find \:  \:  \: the \:area \: now \\  = \pi {r}^{2} \\  = \pi \times  {21.01}^{2}   \\  = 1,386.76

lets \: fin d\:  \:  \: the \:  \: diameter \\  = d = 2r \\ =  d = 2 \times 21.01 \\  = d = 42.02

7 0
2 years ago
Find the value of X <br><br>Anyone think they can help me with this?
ratelena [41]

Answer:

x = 15

Step-by-step explanation:

The segment that is x units long is the midsegment of the largest triangle. The midsegment is half as long as the line parallel to the midsegment. It is half as long as the 30 unit long segment.

Note how the vertical sides (marked with the double tickmarks) are congruent to one another. The smaller pieces are both the same length, so they combine to something twice as big. Go in reverse: one segment with a pair of double tickmarks is exactly half as long as the entire vertical side. The same can be said about the horizontal sides as well.

3 0
3 years ago
I NEED HELP ASAP!! Each​ month, your phone company charges you a fee of 10 cents per minute as well as a service fee of ​$2.95 W
Trava [24]
The answer is Y= 2.95-10x
4 0
2 years ago
Other questions:
  • What is 10.666 rounded to the nearest tenth
    5·2 answers
  • Your friend comes from a large family. This list shows the ages of all of the children in her family. What is the median age of
    7·2 answers
  • What is 7.5 divided by 74.25
    9·1 answer
  • Several years​ ago, 43​% of parents who had children in grades​ K-12 were satisfied with the quality of education the students r
    5·1 answer
  • PLEASE HELP!! I’m very confuse
    9·1 answer
  • Calculate the frequency of a wave with a speed of 130 m/s and a wavelength of 2.5
    7·1 answer
  • Type a digit that makes this statement true. HELPPPP MEEEEE PLZZZZZ!!!
    6·2 answers
  • Which of the following is most likely the next step in the series
    6·2 answers
  • Which situation could this graph represent?
    8·2 answers
  • Eric wants to create a scale drawing of a house. The scale drawing needs to fit on a piece of paper that is 6 inches wide. The d
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!