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
vlada-n [284]
3 years ago
9

Factor the quadratic expression t^2 + 4t - 7

Mathematics
1 answer:
zepelin [54]3 years ago
7 0

Answer:

Not factorable.

Step-by-step explanation:

We have a trinomial (3 terms). We factor by splitting the middle term 4t into factors of -7 (the last term) which add to 4.

-7 = 1 * -7

4t= 1t+-7t doesn't work

4t=-1t+7t doesn't work

This is not factorable.



You might be interested in
The ages of the winners of a cycling tournament are approximately bell-shaped. The mean age is 27.2 years, with a standard devia
elena-14-01-66 [18.8K]

Answer:

a. z-score = -1.2

b. The age 23 years old is -1.2 standard deviations below the mean

c. The age is not unusual

Step-by-step explanation:

a. Transformation to z-score

Mathematically;

z-score = (x - μ)/σ

where σ and μ are the standard deviation and the mean respectively.

From the question, x = 23, μ = 27.2 and σ = 3.5

Let’s put these into the equation;

z-score = (23-27.2)/3.5 = -1.2

b. Interpretation of result

The interpretation is that 23 years old is -1.2 standard deviations below the mean

c. Determination

The age is not unusual. This is because any z-value below -2 or above 2 is considered unusual

-1.2 is above -2 and thus it is not unusual

7 0
3 years ago
22 cm 14 cm 14 cm what is the volume​
Gala2k [10]

Answer:

height 14 cm

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Find the solution for the system of the equation c=-t+2 and c=-4t-4
romanna [79]

Answer:it’s a I think

Step-by-step explanation:

7 0
3 years ago
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
ch4aika [34]

Answer: -258

<u>Step-by-step explanation:</u>

Given the sequence {-8, 16, -32, 64, ... , a₇} we know the following

  • the first term (a₁) = -8
  • the common ratio (r) = -2
  • the number of terms (n) = 7

Input the information above into the Sum formula:

S_n=\dfrac{a_1(1-r^n)}{1-r}\\\\S_7=\dfrac{-8(1-(-2)^7)}{1-(-2)}\\\\.\quad =\dfrac{-8(1-(-128))}{1+3}\\\\.\quad =\dfrac{-8(129)}{4}\\\\.\quad =-2(129)\\\\.\quad =-258

3 0
3 years ago
Read 2 more answers
Factor by grouping.<br> 5w+2w + 25w + 10
masha68 [24]

Answer:

32w+10

Step-by-step explanation:

add all the w's then just add 10

7 0
3 years ago
Other questions:
  • What is the plural name for mitochondrion?
    10·2 answers
  • 100 POINTS!! somebody please answer! but it has to correct!
    11·1 answer
  • Solve the system of equations.<br> 4x + y = -3<br> 5x + 3y = 12
    10·1 answer
  • (4x^2+16x+11) divided by (x+3)
    10·2 answers
  • 9 less than 7 times some number is -6
    12·2 answers
  • For what values of b are the vectors [-6,b,2] and [b,b2,b] orthognal
    15·1 answer
  • Find the slope of the line through the following points<br> (3,-20) and (5,8)<br> m =
    10·1 answer
  • E/P 14)The equation 2x²+ 4kx - 5k = 0, where k is a constant, has no real roots.
    12·1 answer
  • What is the equation of the line that has a slope of -3 and a y-intercept of -1
    5·1 answer
  • Two linear functions are combined with addition, and then the same two linear functions are combined by
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!