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
rjkz [21]
3 years ago
11

Pls help u dont have to explain that much​

Mathematics
1 answer:
ira [324]3 years ago
3 0

Answer:

k = -7

Step-by-step explanation:

Given

x² - x - 42 = (x + k)(x + 6)

Required

Find k

x² - x - 42 = (x + k)(x + 6)

Expand the left hand side

x²-7x + 6x - 42 = (x + k)(x+ 6)

Factorize

x(x - 7) + 6(x- 7) = (x + k)(x+ 6)

Further factorize

(x - 7)(x + 6) = (x + k)(x + 6)

By comparison

x + k = x - 7

Subtract x from both sides

k = -7

You might be interested in
Devan spent 14 of her paycheck at the mall. She spent 12 of that money on shoes. What fraction of her total paycheck did she spe
Alla [95]
She spent 12 of her paycheck and had 2 more
3 0
3 years ago
Read 2 more answers
I need help fast please and no fies
givi [52]

Answer:

x=-16

Step-by-step explanation:

from x=-3 to get to y=12 u need to multiply x=-3 by -4 to get to 12 so for y=64 u need to divide by -4 which equals x=-16

4 0
3 years ago
Read 2 more answers
In a package of 25 colored pencils 8 are red , if you bought 125 pencils how many would be red
lora16 [44]
125=5 packets of pencils
each package contains 8 red 
5 packages contain 5×8=40
In 125 pencils 40 are red.
5 0
3 years ago
What is the nth term rule of the quadratic sequence below? − 4 , 1 , 12 , 29 , 52 , 81 , 116
motikmotik

Answer:

81

Step-by-step explanation:

5 0
3 years ago
Consider the function below. Find f(5).<br> f(x) = -2x + 7
puteri [66]

Answer:

f(5) = -3

Step-by-step explanation:

f(x) = -2x + 7

f(5) = -2(5) + 7

f(5) = -10 + 7

f(5) = -3

4 0
2 years ago
Other questions:
  • What is the solution to the equation?<br><br>A. h=11/3<br><br>B.h=5<br><br>C.h=21/2<br>D. h=7
    9·1 answer
  • Which situation is represented by the inequality? 3x + 5 &gt; 2x + 15
    12·1 answer
  • What is S7 for 6 – 24 + 96 – 384 + ... ?
    11·2 answers
  • Simplify:-6+{14+2[60-9(1+3)]}
    11·2 answers
  • 3. What is the volume of the figure?<br>A. 15 cm<br>B. 33 cm<br>C. 45 cm <br>D. 54 cm<br>​
    12·2 answers
  • Find the GCF for the list.
    11·1 answer
  • Please help me answer this!!!
    5·1 answer
  • Of 10<br> Find the gradient of the line segment between the points (2,-2) and (0,-6).
    13·1 answer
  • FREEEEEEEEEEEEEEEEEE POINTS GET RICHHHHHHHHHHHHHHHHHH
    13·2 answers
  • What is equivalent to (3 - 2x) (4x - 7)​
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!