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
bearhunter [10]
3 years ago
11

Help please ASAP X^2+4x-4=8

Mathematics
1 answer:
Vladimir79 [104]3 years ago
8 0

Answer:

x = -8, x = 4

Step-by-step explanation:

x² + 4x - 12 = 0

(x + 8) (x - 4) = 0

x + 8 = 0, x = -8

x - 4 = 0, x = 4

You might be interested in
A new car loses value at a constant rate. You purchase a new car for $21,500. After 3 years the value of the car was $14,120. Wh
Airida [17]

Answer:

Step-by-step explanation:

If the car is depreciating at a constant rate, this indicates that the function is linear.  We can find the equation for the linear function by first finding the slope of the line.  Let's do that using the slope formula.  The coordinates we will use to do this are found in (year, value).  Our coordinates are (0, 21500) and (3, 14120).  The first coordinate says that before any time goes by at all, meaning when the car was brand new, its value was 21500.  The second coordinate says that after 3 years, the value of the car was 14120.

m=\frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

Filling in:

m=\frac{14120-21500}{3-0}=\frac{-7380}{3}=-2460

This is the slope.  In the context of our problem, it means that for each year that goes by, the car's value goes down $2460.  

Now we can use that slope and one of our coordinates to write the equation of the line.   We can choose either one of the coordinates to write our equation.  Let's use the first one, since it will be easier.  Rest assured that regardless of which one you choose, you will get the same equation. We fill in the slope-inteercept form of a line, y = mx + b, where y is the y value from the coordinate, m is the slope we solved for, x is the x value from the same coordinate, and b is the y-intercept.  We are solving for b.

21500 = -2460(0) + b and

21500 = 0 + b so

b = 21500.  Our equation, then, is

y = -2460x + 21500

If we want to find the value of the car, y, in 5 years, x, we plug in 5 for x and solve for y.

y = -2460(5) + 21500 and

y = -12300 + 21500 so

y = $9200

That means that in 5 year the car will be worth only $9200 when it is 5 years old.

5 0
3 years ago
Giving brainliest!!!!!! If you don’t know the answer please don’t answer it
antoniya [11.8K]

Answer:

The answer is D)

4 0
2 years ago
Read 2 more answers
Six cards numbered from 1 to 6 are placed in an empty bowl. First one card is drawn and then put back into the bowl; then a seco
kari74 [83]

Answer:

C. \frac{1}{18}

Step-by-step explanation:

Given: Six cards numbered from 1 to 6 are placed in an empty bowl. First one card is drawn and then put back into the bowl then a second card is drawn.

To Find: If the cards are drawn at random and if the sum of the numbers on the cards is 8, what is the probability that one of the two cards drawn is numbered 5.

Solution:

Sample space for sum of cards when two cards are drawn at random is \{(1,1),(1,2),(1,3)......(6,6)\}

total number of possible cases =36

Sample space when sum of cards is 8 is \{(3,5),(5,3),(6,2),(2,6),(4,4)\}

Total number of possible cases =5

Sample space when one of the cards is 5 is \{(5,3),(3,5)\}

Total number of possible cases =2

Let A be the event that sum of cards is 8

p(\text{A}) =\frac{\text{total cases when sum of cards is 8}}{\text{all possible cases}}

p(\text{A})=\frac{5}{36}

Let B be the event when one of the two cards is 5

probability than one of two cards is 5 when sum of cards is 8

p(\frac{\text{B}}{\text{A}})=\frac{\text{total case when one of the number is 5}}{\text{total case when sum is 8}}

p(\frac{\text{B}}{\text{A}})=\frac{2}{5}

Now,

probability that sum of cards 8 is and one of cards is 5

p(\text{A and B}=p(\text{A})\times p(\frac{\text{B}}{\text{A}})

p(\text{A and B})=\frac{5}{36}\times\frac{2}{5}

p(\text{A and B})=\frac{1}{18}

if sum of cards is 8 then probability that one of the cards is 8 is \frac{1}{18}, option C is correct.

3 0
2 years ago
If f(x) = -x^2+3x, find (-5)
love history [14]
The A/= it means the answer is okay.

4 0
3 years ago
A company makes bicycles in two sizes. The first bicycle size weighs 18.5 pounds. The second bicycle sizes weighs 1/14 as much a
QveST [7]
The second bicycle would weigh 1.32142857143 pounds or rounded to 1.32.
You would find this by multiply 18.5 by 1/14
7 0
2 years ago
Read 2 more answers
Other questions:
  • A spinner used for a game is divided into 3 sections;yellow,brown and orange. Janie spins the spinner 18 times. The spinner land
    9·2 answers
  • What is the most specific name for quadrilateral ABCD? parallelogram rectangle rhombus square
    16·2 answers
  • Will give you brainlyist if the ansers right PLS HELP
    10·1 answer
  • If jimmy has 384 toy cars and his friend takes 197 of the cars how many cars dows jimmy have left
    12·2 answers
  • Mr. Hosley has a brother that is 6 years older. Together their ages are 106. How old is each of these siblings?
    6·2 answers
  • Is y= 12 x a proportinal relationship
    12·2 answers
  • Arrange the following<br> numbers in order from least<br> to greatest.<br> 96,432; 94,632; 96,342
    13·1 answer
  • Sue bought a bunch of snacks that each cost $2.50. Let y represent the total cost and x represent the number of snacks she bough
    7·1 answer
  • How many times larger is the diameter than the radius of a circle?
    11·2 answers
  • You want to buy a new car for $22,654 and decide to take out an auto loan. You make a $3,200 down payment and finance the remain
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!