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Sidana [21]
3 years ago
12

Simplify the expression: ( X + 5)( X-7)

Mathematics
2 answers:
Hitman42 [59]3 years ago
7 0
(x + 5)(x - 7)
x(x - 7) + 5(x - 7)
x(x) - x(7) + 5(x) - 5(7)
x² - 7x + 5x - 35
x² - 2x - 35
Igoryamba3 years ago
3 0
Answer is in the photo UwU

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What is the scale factor from figure A to figure B?
Andrej [43]

Answer:

hi its simple.

Step-by-step explanation:

9;3

or simplified...

3;1

3 0
3 years ago
Read 2 more answers
Without sketching the graph of the function, find the maximum value of y = - 5x + 4 over the interval - 4 <= x <= 3. Expla
yKpoI14uk [10]

Answer:

y_{max}=24

Step-by-step explanation:

Given function y=-5x+4 is linear function. This linear function represents the straight line on the coordinate plane. The slope of this line is -5. Since the slope is negative, the linear function is decreasing for all x. This means

\text{ if } x_1 f(x_2)

You ar geven the interval -4\le x\le 3. So, the maximum value of the function is at the point x=-4 and the minimum value of the function is at the point x=3.

At x=-4,

y=-5\cdot (-4)+4=20+4=24.

3 0
3 years ago
First, rewrite 5/9 and 11/21 so they have a common denominator. Then, use to order 5/9 and 11/21.
spayn [35]

5/9 and 11/21

LCM of the denominators is 63

changing their denominators to all have a common denominator of 63:

5(7)/63 = 35/63

11(3)/63 = 33/63

from the above;

5/9 > 11/21.

4 0
3 years ago
One scuba diver is at 96 feet below sea level. Another scuba diver is directly above at 50 feet below sea level. Determine the d
nadya68 [22]

Answer:

46ft is the answer.

Step-by-step explanation:

Simply determine the distance between them by subtracting 50 from 96. once you do this you will end up with 46 feet.

6 0
4 years ago
Abby used the law of cosines for TriangleKMN to solve for k.
torisob [31]

Answer:

  m∠K = 37° and n = 31

Step-by-step explanation:

A lot of math is about matching patterns. Here, the two patterns we want to match are different versions of the same Law of Cosines relation:

  • a² = b² +c² -2bc·cos(A)
  • k² = 31² +53² -2·31·53·cos(37°)

<h3>Comparison</h3>

Comparing the two equations, we note these correspondences:

  • a = k
  • b = 31
  • c = 53
  • A = 37°

Comparing these values to the given information, we see that ...

  • KN = c = 53 . . . . . . . . . . matching values 53
  • NM = a = k . . . . . . . . . . . matching values k
  • KM = b = n = 31 . . . . . . . matching values 31
  • ∠K = ∠A = 37° . . . . . . . matching side/angle names

Abby apparently knew that ∠K = 37° and n = 31.

__

<em>Additional comment</em>

Side and angle naming for the Law of Sines and the Law of Cosines are as follows. The vertices of the triangle are labeled with single upper-case letters. The side opposite is labeled with the same lower-case letter, or with the two vertices at either end.

Vertex and angle K are opposite side k, also called side NM in this triangle.

5 0
2 years ago
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