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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

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Help me out here real quick please
kirill115 [55]

Answer:

25

Step-by-step explanation:

10÷1/4=25

3 0
3 years ago
Item 15 Your math class is collecting canned food for a local food drive. The goal is to collect at least 130 cans but no more t
Margarita [4]

For this case, the first thing we must do is define variables.

We have then:

n: number of cans that each student must bring

We know that:

The teacher will bring 5 cans

There are 20 students in the class

At least 105 cans must be brought, but no more than 205 cans

Therefore the inequation of the problem is given by:

Answer:

105 <u><</u> 20n + 5 <u><</u> 205

the possible numbers n of cans that each student should bring in is:

105 <u><</u> 20n + 5 <u><</u> 205

8 0
3 years ago
How do i find the vertical asymptote?
levacccp [35]

Answer:

  find the value of x that makes the denominator zero: x = 7

Step-by-step explanation:

A vertical asymptote shows up where the denominator is zero. As the denominator gets closer to zero, the function value gets larger without bound (unless there is a numerator factor that cancels the one in the denominator).

To find the value of x at the vertical asymptote, solve the equation ...

  denominator = 0

  x - 7 = 0

  x = 7 . . . . . . . add 7 to both sides

7 0
3 years ago
F(x) =5+ 1 , find f(-4)
tester [92]

Answer:

Step-by-step explanation:

F(x) =5x + 1 , find f(-4)

Putting value of x = 4

F(4) = 5(4) + 1

= 20 + 1 = 21

5 0
3 years ago
A density curve for all the possible weights between 0 pounds and 10 pounds is in the shape of a rectangle. What is the value of
Evgesh-ka [11]
The total area under the curve must equal 1. Let the value of the density curve be x. Then 10x = 1. Therefore x = 1/10 or 0.1.
The correct answer is D. 0.1.
8 0
3 years ago
Read 2 more answers
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