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3 years ago

Help me you you oyu ouy ou yo

Mathematics

2 answers:

WARRIOR [948]3 years ago

6 0

Answer:

(x-7) (x+1)

Step-by-step explanation:

x^2 - 6x - 7

What two numbers multiply to -7 and add to -6

-7*1 = -7

-7+1 = -6

(x-7) (x+1)

Len [333]3 years ago

5 0

Answer:

D. (x - 7) (x + 1)

Step-by-step explanation:

= x^2 - 6x - 7

= x^2 - 7x + x - 7

= x(x - 7) + 1(x - 7)

= (x + 1)(x - 7)

= (x - 7) (x + 1)

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elect the correct answer from each drop-down menu. A system of linear equations is given by the tables. x y -5 10 -1 2 0 0 11 -2

sergeinik [125]

Answer:

First equation: y = -2x

Second equation: y = 3 - x

Solution: (1, -2)

Step-by-step explanation:

Assuming the ordered pairs of the tables are:

Table 1

(-5, 10) (-1, 2) (0, 0) (11, -22)

Table 2

(-8, -11) (-2, -5) (1, -2) (7, 4)

To create a linear equation, pick 2 ordered pairs. Calculate the slope by using the slope formula, then use the points-slope form of the linear equation to form the equation.

$\textsf{slope }m=\dfrac{\textsf{change in }y}{\textsf{change in }x}$

$\textsf{point-slope form : }y-y_1=m(x-x_1)$

Equation 1

$\textsf{slope }m=\dfrac{2-10}{-1+5}=-2$

$y-0=-2(x-0)\\\\\implies y=-2x$

Equation 2

$\textsf{slope }m=\dfrac{-5+11}{-2+8}=1$

$y+11=1(x+8)\\\\\implies y=x-3$

Solution to the System

Equate the equations and solve for x:

-2x = x - 3

⇒ 0 = 3x - 3

⇒ 3x = 3

⇒ x = 1

Substitute found value of x into one of the equations and solve for y:

y = 1 - 3 = -2

Therefore, the solution is (1, -2)

4 0

1 year ago

in right triangle ABC, angle C is a right angle, AB is 25 units long, and BC is 24 units long. What is the lenght of AC?

ycow [4]

Answer:

7 units long

Step-by-step explanation:

We are given a right triangle ABC

AB = 25 units
BC = 24 units

We are required to determine the length of AC

We are going to use the Pythagoras theorem;
According to the theorem, if a and b are the legs of a right triangle and c is the hypotenuse, then;

a² + b² = c²

In this case;

AB is the hypotenuse and BC is one of the legs of the triangle;

Therefore;

AB² = BC²+AC²

Rearranging the formula;

AC² = AB² - BC²

= 25² - 24²

= 625 - 576

= 49

AC = √49

= 7

Thus, AC is 7 units long

6 0

2 years ago

The area of a square battlefield was 22,500 square miles. How long will it take a group of soldiers to cross the field diagonall

VARVARA [1.3K]

$\sqrt{22500} = s
\\\ diagonal = s \sqrt{2}
\\\ s = 150, \ diagonal = 150\sqrt{2}
\\\ diagonal \approx 212.132
\\\ 212.132/3.2 \approx 66.291 \ hrs$

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2 years ago

What is the square rout of 56

Mars2501 [29]

$\sqrt{56}=\sqrt{4\cdot14}=\sqrt4\cdot\sqrt{14}=2\sqrt{14}$

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3 years ago

Please answer I need it fast thx ¡,,

Alla [95]

Answer:

whats your question? I can't see what you need

7 0

3 years ago