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3 years ago

It’s question 126. Does anyone know how to solve the rest of it or if I messed up so far?

Mathematics

1 answer:

Bad White [126]3 years ago

5 0

Answer:

Step-by-step explanation:

The last line of your solution is incorrect. You cannot divide that '6' by '2' and not also divide '-3√2' by '2.'

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Gradient of f(x) equal to3x^2 -2x plus 1

timurjin [86]

F(x) = 3x^2 - 2x + 1

4 0

3 years ago

Prove: If λ is an eigenvalue of A , x is a corresponding eigen- vector, and s is a scalar, then λ − s is an eigenvalue of A − sI

tamaranim1 [39]

Answer:

If λ is an eigenvalue of A and x is the corresponding eigenvector, then Ax=λx. Now, notice that (A-sI)x=Ax-sx=λx-sx=(λ-s)x. As x is different for zero we can affirm that (λ-s) is an eigenvalue of A-sI and x is the corresponding eigenvector

Step-by-step explanation:

Recall from the definition of eigenvalue: we say that the number (real or complex) λ is an eigenvalue of the matrix A if and only if there is a vector x, different from zero such that Ax=λx.

So, we only need to show that (A-sI)x=(λ-s)x.

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3 years ago

Charlie purchases a box of cereal for $3.98, hamburger for $5.76, tomatoes for $2.87, and milk for $4.46. He has $20 with him. A

Gekata [30.6K]

Change is the amount we get back after paying for the commodity.

Change = Money paid – The bill amount

Cost of the box of cereal = $3.98

Cost of Hamburger = $5.76

Cost of tomatoes = $2.87

Cost of milk = $4.46

Total cost of the four items = 3.98 + 5.76 + 2.87 + 4.46 =$17.07

Amount with Charlie = $20

Amount left with Charlie after paying $17.07

= 20 - 17.07

=20.00 - 17.07

=$2.93

So Charlie must expect to get back $2.93 as change.

3 0

4 years ago

Read 2 more answers

Worth 20+ points! Answer all parts and will award brainliest! Please show work

eduard

Factor the following:
x^2 - 5 x - 24
Hint: | Factor x^2 - 5 x - 24 by finding two numbers whose product is -24 and whose sum is -5.
The factors of -24 that sum to -5 are 3 and -8. So, x^2 - 5 x - 24 = (x + 3) (x - 8):
Answer: (x + 3) (x - 8)

___________________________________________________________

Factor the following:
49 x^2 - 64
Hint: | Express 49 x^2 - 64 as a difference of squares.
49 x^2 - 64 = (7 x)^2 - 8^2:
(7 x)^2 - 8^2
Hint: | Factor the difference of two squares.
Factor the difference of two squares. (7 x)^2 - 8^2 = (7 x - 8) (7 x + 8):
Answer: (7 x - 8) (7 x + 8)
<span>-24 + 15 x + x^2
</span>
____________________________________________________________

Factor the following:
x^2 - x - 110
Hint: | Factor x^2 - x - 110 by finding two numbers whose product is -110 and whose sum is -1.
The factors of -110 that sum to -1 are 10 and -11. So, x^2 - x - 110 = (x + 10) (x - 11):
Answer: (x + 10) (x - 11)___________________________________________________________

Factor the following:
49 x^2 - 64
Hint: | Express 49 x^2 - 64 as a difference of squares.
49 x^2 - 64 = (7 x)^2 - 8^2:
(7 x)^2 - 8^2
Hint: | Factor the difference of two squares.
Factor the difference of two squares. (7 x)^2 - 8^2 = (7 x - 8) (7 x + 8):
Answer: (7 x - 8) (7 x + 8)

_______________________________________________________

Factor the following:
25 x^2 + 40 x - 10
Hint: | Factor out the greatest common divisor of the coefficients of 25 x^2 + 40 x - 10.
Factor 5 out of 25 x^2 + 40 x - 10:
Answer: 5 (5 x^2 + 8 x - 2)

__________________________________________________________

Factor the following:
9 x^2 + 3 x^2 - 6 x
Hint: | Add like terms in 9 x^2 + 3 x^2 - 6 x.
3 x^2 + 9 x^2 = 12 x^2:
12 x^2 - 6 x
Hint: | Factor common terms out of 12 x^2 - 6 x.
Factor 6 x out of 12 x^2 - 6 x:
Answer: 6 x (2 x - 1)

4 0

3 years ago

In a biathalon race you first ride a bicycle at an average speed of 21.8 mi/h for 16.5 miles, then you must run for another 5.5

mote1985 [20]

Answer:

6.6 mi/h

Step-by-step explanation:

Given,

For first 16.5 miles, speed is 21.8 miles per hour,

Since,

$Time = \frac{Distance}{Speed}$