1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Gwar [14]
2 years ago
15

URGENTE, PERGUNTAS DE MARCAR:

Mathematics
1 answer:
Norma-Jean [14]2 years ago
3 0

Answer:

2a: (c)

5o: (1, 3) and (1,1)

3a: (b)

1a: (d)

4o: (b)

Step-by-step explanation:

2a: the equation of a circle circumference needs to be transformable to the form (x-x_C)^2 + (y - y_C)^2 = r^2 where C(x_C; y_C) is the center and <em>r</em> is the radius. (a) and (d) can’t be it because they contain non-zero factors on <em>xy</em>. (b) isn’t an equation.

5o: just put the given (<em>x</em>, <em>y</em>) into the equations and see if it holds. (2, 3) isn’t on the circumference of (1) because 2^2+3^2-2\cdot 2 -4\cdot 3 + 4 = 1 \neq 0, (3, 1) isn’t on it either because 3^2 + 1^2 - 2\cdot 3 - 4\cdot 1 + 4 = 4 \neq 0.

3a: calculate the value of the left-hand side term of the equation using (<em>x</em>, <em>y</em>) from the given point <em>M</em>. That’s the difference of square distance to the center to the square radius r^2. Thus it’s 0 if the point is on the circumference, negative if inside and positive if outside. You get 3^2 + 4^2 - 6\cdot 3 -2\cdot 4 + 8 = 7, positive, so it’s outside the circle.

1a: see definition from 2a. Here, r^2 = 9.

4o: insert the y from the straight line equation (r) (which can be equivalently transformed to y = x+1) into the circumference equation. If it yields no solution, that’s outside, it there’s exactly one solution, that’s a tangent and if there are two solutions, it’s a secant. x^2+(x+1)^2+2x - 4(x+1) = x^2 + x^2 + 2x + 1  + 2x - 4x + 4 = 2x^2 + 5 = 0 \iff x^2 = 2.5 \iff x \in \{-\sqrt{2.5}, \sqrt{2.5}\} There are two solutions, so it’s a secant.

You might be interested in
Question Navigator<br> Enter the answer.cubed roots What is
Helen [10]
The answer is 11..and there's a pic for u too...my pleasure helping you

5 0
3 years ago
3 times the sum of y and 9 <br><br> in algebraic expression please help me out!!
Ray Of Light [21]

3(y+9)

plz plz mark brainliest if it helps

3 0
3 years ago
What is the relationship between 9.125 x 10^-3 and 9.125 x 10^2
nalin [4]

9.125*x^2 is 100000 times greater than 9.125*10^(-3).

Note that (10^5)(9.125*10^(-3) = 9.125*10^2.

5 0
3 years ago
Is -4 and -5 &lt;,&gt;,or =
hjlf

-4 is greater than -5

4 0
2 years ago
Is 1/4 greater or is 5/4 grater
Bumek [7]

Answer: 5/4

Step-by-step explanation:

if two number have the same denominator, then the number with the greatest numerator is the greatest.

Basically if the bottom number of two fractions are the same, the bigger top number is the bigger number.

8 0
3 years ago
Read 2 more answers
Other questions:
  • Pls help with this question. WILL MARK BRAINLIEST + 10 POINTS!!!!! :D<br>#7
    7·1 answer
  • If y=-3x + 2, find x when y= -13 *
    13·1 answer
  • 2.
    11·2 answers
  • SIMPLIFY THE EXPRESSION THE SQUAREROOT OF 12
    10·2 answers
  • Evaluate each function at each of the four points.
    5·1 answer
  • What is the gcf and lcm of 6,12,18
    13·1 answer
  • Can someone plz help me with this i need it fast
    15·1 answer
  • Consider the following.x = t − 2 sin(t), y = 1 − 2 cos(t), 0 ≤ t ≤ 8πSet up an integral that represents the length of the curve.
    11·1 answer
  • There are 35 students in a college algebra class. If two fifths of the students are female, how many students are in the class?
    7·1 answer
  • (a) Rearrange the equation<br> x<br> + 2y = 6 to make y the subject.
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!