MATHEMATICS HIGH SCHOOL

Solve x2 - 7x = -13.

I need the answer to be a fraction with +- answer

Answers

Answer 1
Answer: the answer is x=7+-i√3/2
Answer 2
Answer:

Answer:

x= +13/5

Step-by-step explanation:

2-7 is -5 so it simplifies to -5x=-13

Then you divide both sides by -5 to get -5x/-5=-13/-5

The negatives cancel off and your left with x=13/5

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How do you answer these questions?

Answers

First page:

Angles B and C >>> vertical angles

C + D is 180 because they form a >>> straight line

D and E are congruent bc they are alternating interior.

Second page:

If A = 72 degrees, then D is 72 degrees. E and G would also be 72 degrees.

If A = 72, just remember that A + B = 180 (bc together they are a straight line), so 180-72 = 108. So Angle B is 108 degrees.

If B is 108 degrees, then C, F and H are also 108 degrees.

So the actual questions in the order listed:

B = 108 degrees

D = 72 degrees

E = 72 degrees

F = 108 degrees

H = 108 degrees

G = 72 degrees

Which number is a common factor of 24, 48, and 144?16

10

9

8

Answers

8 is the common factor 24÷8=3 48÷8=6 144÷8=18

Justify each step in solving the equation  by writing a reason for each statement.

Answers

Step-by-step explanation:

We are provided with an equation and are required to give reasons on how we got the final answer.

(1.) The equation is -3(2x-3) = 25-8x is given.

(2.) In this step, we have simplified the left hand side of the equation by opening the bracket i.e. -6x+9 = 25-8x

(3.) Here, the terms containing 'x' are brought to the left hand side of the equation and simplified i.e. 2x+9 = 25

(4.) Now, the constant terms of the equation are brought to the right side of the equation and simplified i.e. 2x = 16.

(5.) Lastly, the whole equation is divided by 2 in order to get the value of 'x' i.e. x = 8.

Help, please answer this for me, I can't figure it out.

Answers

Answer: x^2 + 23x + 49

Step-by-step explanation:

The area of the shaded region is the area of the big rectangle minus the square

area of rectangle

area = bh

b = 2x + 5

h = x + 10

area = (2x+5)(x+10) FOIL

= 2x^2 + 20x + 5x + 50

= 2x^2 + 25x + 50

area of square

area = s * s

s = x + 1

area = (x+1)(x+1) FOIL

= x^2 + x + x + 1

= x^2 + 2x + 1

area of shaded region

now subtract rectangle - square

(2x^2 + 25x + 50) - (x^2 + 2x + 1)

= 2x^2 + 25x + 50 - x^2 - 2x - 1 combine like terms

= x^2 + 23x + 49

Answer:

(x² + 23x + 49) units²

Step-by-step explanation:

(x + 10)(2x + 5) - (x + 1)²

(2x² + 20x + 5x + 50) - (x² + 2x + 1)

2x² + 25x + 50 - x² - 2x - 1

x² + 23x + 49

Chris earns four times Vesna's wage v and Vesna earns $17 more than Dawn. How many dollars does Chris earn if their combined wages are $163?

Answers

Call Dawn's wage x, we will have Vesna's wage = x + 17 and Chris' wage = 4x(x + 17). So we have the equation:
x + (x + 17) + 4 * (x + 17) = 163 \n 2x + 17 + 4x + 68 = 163 \n 6x = 78 \n x = 13
Therefore, Chris's wage:
4 * (13 + 17) = 120

Need help with the question

Answers

Answer:

  a = -21

Step-by-step explanation:

Multiply the equation by the reciprocal of the coefficient of 'a'.

  (-7/6)(-6/7)a = (-7/6)(18)

  a = (-7)(18/6) = (-7)(3)

  a = -21

Answer:

I think the answer is a=-1/21
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