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
UkoKoshka [18]
3 years ago
8

What methods could be used to solve the following quadratic equation x^2 +12-28=0

Mathematics
1 answer:
kakasveta [241]3 years ago
7 0

Answer:

Step-by-step explanation:

x^2 +12x-28=0

x^2+(14-2)x-28=0

x^2+14x-2x-28=0

X(X+14)-2(X+14)=0

(X+14)(X-2) is the factor of this quadratic equation.

You might be interested in
PHONE CARDS You purchase a 300 minute phone card. The function
Anarel [89]

Answer:

9750

Step-by-step explanation:

dsbhgmv hsfhg isjkbbh f usfvnhs gbguhd sbfcixhuxt nkugd

6 0
2 years ago
What is the value of x in the solution to the system of linear equations? {y=3x+2 y=x-4 a –7 b –3 c 1 d 5
lyudmila [28]

Since y must equal both 3x+2 and x-4, we deduce that 3x+2 and x-4 must equal each other. So, we have

3x+2=x-4 \iff 2x+2=-4 \iff 2x=-6 \iff x=-3

5 0
3 years ago
Read 2 more answers
The ratio of the perimeters of two similar triangles is 4:7. What is the area of each of these triangles if the sum of their are
arsen [322]

Answer:

  16 cm^2 and 49 cm^2

Step-by-step explanation:

The ratio of areas is the square of the ratio of linear dimensions, so is ...

  (4/7)^2 = 16/49

The sum of these "ratio units" is 16 +49 = 65. The sum of triangle areas is 65 cm^2, so each "ratio unit" must stand for 1 cm^2 of area. That is, the triangles must have areas of ...

  • 16 cm^2
  • 49 cm^2
3 0
3 years ago
Read 2 more answers
After a bride has interviewed 7 DJs to play at her wedding, her fiance tells her she needs to narrow it down to 4 DJs. In how ma
Alex17521 [72]

Answer:

840

Step-by-step explanation:

Given

DJs = 7

To\ pick = 4

Required

Determine the number of rankings

The term "ranking" as used in this question implies permutation and the required is calculated using:

^nP_r = \frac{n!}{(n-r)!}

Where

n = 7

r = 4

So:

^nP_r = \frac{n!}{(n-r)!}

^7P_4 = \frac{7!}{(7-4)!}

^7P_4 = \frac{7!}{3!}

^7P_4 = \frac{7 * 6 * 5 * 4 * 3!}{3!}

^7P_4 = 7 * 6 * 5 * 4

^7P_4 = 840

<em>Hence, number of ranking is 840</em>

7 0
3 years ago
Twice Henry's earnings increased by 10 is $253. Therefore, Henry earned $____
valina [46]

Answer:

121.50

Step-by-step explanation:

Let x be the earnings

2x+10 = 253

Subtract 10 from each side

2x+10-10 = 253-10

2x = 243

Divide by 2

2x/2 = 243/2

x = 121.50

8 0
2 years ago
Other questions:
  • Can someone please help me on this question
    5·1 answer
  • Please do I'm to lazy to try and do it.
    10·2 answers
  • A clothing manufacturer produced 900 items with flaws. Each flawed item represented a loss of $12.50. Which expression represent
    5·1 answer
  • What is two ways to draw 62, 6 tens 2 ones , i need the 2nd way
    7·1 answer
  • Remember to round to the nearest tenth pls!
    7·1 answer
  • The area of the base, or bottom, of a canister, can be found by dividing its volume by its height. What is the area of the base
    6·2 answers
  • The amount of​ carbon-14 present in animal bones t years after the​ animal's death is given by ​P(t)= -0.00012097t. How old is a
    12·1 answer
  • Sandra bought 5 pounds of sweet potatoes for $6.80. What is the cost per pound of the sweet potatoes?
    11·1 answer
  • TIMER !! HELP!!
    9·1 answer
  • Brainly for the one who help me
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!