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
Alex
3 years ago
13

In Exercise,solve for x. x2 + 4x - 5 = 0

Mathematics
1 answer:
Anni [7]3 years ago
6 0

Answer:

{x}^{2}  + 5x - x - 5 = 0 \\ x(x + 5) - 1(x + 5) = 0 \\ (x + 5)(x - 1) = 0 \\ x =  - 5 \: or \: x = 1

You might be interested in
you currently have 24 credit hours and a 2.8 gpa you need a 3.0 gpa to get into the college. if you are taking a 16 credit hours
Juliette [100K]

Answer:

\sum_{i=1}^n w_i *X_i = 2.8*24 = 67.2

And for this case we want a gpa of 3.0 taking in count that in this semester he/ she is going to take 16 credits so then the new mean would be given by:

\bar X_f = \frac{\sum_{i=1}^n w_i *X_i+w_f *X_f }{24+16} = 3.0

And we can solve for \sum_{i=1}^n w_f *X_f and solving we got:

3.0 *(24+16) =\sum_{i=1}^n w_i *X_i +\sum_{i=1}^n w_f *X_f

And from the previous result we got:

3.0 *(24+16) =67.2 +\sum_{i=1}^n w_f *X_f

And solving we got:

\sum_{i=1}^n w_f *X_f =120 -67.2= 52.8

And then we can find the mean with this formula:

\bar X_2 = \frac{\sum_{i=1}^n w_f *X_f}{16}= \frac{52.8}{16}=16=3.3

So then we need a 3.3 on this semester in order to get a cumulate gpa of 3.0

Step-by-step explanation:

For this case we know that the currently mean is 2.8 and is given by:

\bar X = \frac{\sum_{i=1}^n w_i *X_i }{24} = 2.8

Where w_i represent the number of credits and X_i the grade for each subject. From this case we can find the following sum:

\sum_{i=1}^n w_i *X_i = 2.8*24 = 67.2

And for this case we want a gpa of 3.0 taking in count that in this semester he/ she is going to take 16 credits so then the new mean would be given by:

\bar X_f = \frac{\sum_{i=1}^n w_i *X_i+w_f *X_f }{24+16} = 3.0

And we can solve for \sum_{i=1}^n w_f *X_f and solving we got:

3.0 *(24+16) =\sum_{i=1}^n w_i *X_i +\sum_{i=1}^n w_f *X_f

And from the previous result we got:

3.0 *(24+16) =67.2 +\sum_{i=1}^n w_f *X_f

And solving we got:

\sum_{i=1}^n w_f *X_f =120 -67.2= 52.8

And then we can find the mean with this formula:

\bar X_2 = \frac{\sum_{i=1}^n w_f *X_f}{16}= \frac{52.8}{16}=16=3.3

So then we need a 3.3 on this semester in order to get a cumulate gpa of 3.0

6 0
3 years ago
Which of the following affect the market value of a house? Mark all that apply.
garik1379 [7]
The answers are

B.
C.
D.
E.
6 0
3 years ago
Read 2 more answers
I want the answer to this , zoom in if you can't see well
galben [10]

We are going to need to know the formula for the lateral surface area and volume of a cylinder in order to find our answers. Below are the equations:

A_L = 2 \pi r h

V = \pi r^2 h

  • h is the height
  • r is the radius

Using these formulas, we can solve these problems.

A_L = 2 (3.14)(48.9) (84.3) \approx \boxed{25887.856}

V = (3.14) (48.9)^2 (84.3) \approx \boxed{632958.069}

3 0
3 years ago
The values (11.1, 4) and (x, 15) are from an inverse variation. Find the missing value and round to the nearest
Murrr4er [49]
12 this is because my number for sports is 12 and i just need to answer a ? for point thanks have a good day
3 0
3 years ago
Peter and Jane have some money in the ratio 1:3
dexar [7]
Peter=x
Jane=3x
3x-x=12
X=6
3 0
2 years ago
Read 2 more answers
Other questions:
  • 7/3+3(2/3−1/3)*2 I need an answer to this question really quick, and by the way the two in the end is a second power
    12·2 answers
  • Calculer les expressions suivantes (après les avoir simplifiés) aidez moi svp urgent ❤️
    12·1 answer
  • Is 7/11 a rational number
    15·2 answers
  • name at least two Coastal features that are shaped by erosion and two costal features that are shaped by deposition
    15·1 answer
  • A sociologist polled a random sample of people and asked them their age and annual income. The two-way frequency table below sho
    6·2 answers
  • Can someone tell me the answer please ?
    9·2 answers
  • Fill in the blanks below.
    10·2 answers
  • Can someone help me on this plzzz
    6·1 answer
  • Mr. Jackson divided £420 between his children in the ratio of their ages, Mitch is 4 and Jo is 3
    6·1 answer
  • Four times the square of a number is 21 more than eight times the number.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!