All categories

2 years ago

Help me with this .

Mathematics

2 answers:

guajiro [1.7K]2 years ago

5 0

The open circle is at negative one, pointing left and the closed circle is at two pointing right, the opposite direction.

Happy studying!
~Brooke❤️

vaieri [72.5K]2 years ago

4 0

Open circle at -1 pointing left and closed circle at 2 pointing right

You might be interested in

Find the diameter of a circle with an area of 6767 square centimeters.

scZoUnD [109]

Area=6767cm²

Diameter be d

Radius be r

πr²=6767
r²=6767/π
r²=2155
r=46.4cm

Diameter=2r=46.4(2)=92.8cm

6 0

1 year ago

Read 2 more answers

A student is given that point P(a, b) lies on the terminal ray of angle Theta, which is between StartFraction 3 pi Over 2 EndFra

Harman [31]

Answer:

A.

The student made an error in step 3 because a is positive in Quadrant IV; therefore,

$cos\theta = \frac{a\sqrt{a^2 + b^2}}{a^2 + b^2}$

Step-by-step explanation:

Given

$P\ (a,b)$

$r = \± \sqrt{(a)^2 + (b)^2}$

$cos\theta = \frac{-a}{\sqrt{a^2 + b^2}} = -\frac{\sqrt{a^2 + b^2}}{a^2 + b^2}$

Required

Where and which error did the student make

Given that the angle is in the 4th quadrant;

The value of r is positive, a is positive but b is negative;

Hence;

$r = \sqrt{(a)^2 + (b)^2}$

Since a belongs to the x axis and b belongs to the y axis;

$cos\theta$ is calculated as thus

$cos\theta = \frac{a}{r}$

Substitute $r = \sqrt{(a)^2 + (b)^2}$

$cos\theta = \frac{a}{\sqrt{(a)^2 + (b)^2}}$

$cos\theta = \frac{a}{\sqrt{a^2 + b^2}}$

Rationalize the denominator

$cos\theta = \frac{a}{\sqrt{a^2 + b^2}} * \frac{\sqrt{a^2 + b^2}}{\sqrt{a^2 + b^2}}$

$cos\theta = \frac{a\sqrt{a^2 + b^2}}{a^2 + b^2}$

So, from the list of given options;

The student's mistake is that a is positive in quadrant iv and his error is in step 3

3 0

2 years ago

How many solutions does this have? 2x = 2x - 9 A. No B. One C. Two D. Infinity

Andru [333]

Answer:

A. No solutions

Step-by-step explanation:

2x-2x=-9

0= -9

Since 0 does not equal -9, there are no solutions.

8 0

3 years ago

Read 2 more answers

Both please.........

Levart [38]

Sry I'm couldn't solve the second one but the ans for the 1st is 504 sq units

3 0

2 years ago

23,579 38,743 65,559 +66.559

viktelen [127]

Answer:

194,440 or 127,947.559

Step-by-step explanation:

if that's supposed to be a comma on 66.559 then the answer is 194,440. If not it's 127,947.559.

5 0

2 years ago