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2 years ago

What is the image of the point (2, 8) after a rotation of 270 counterclockwise about the origin ?

Mathematics

2 answers:

jok3333 [9.3K]2 years ago

6 0

Answer:

(8,-2)

Step-by-step explanation:

x and y switch places and x's sign is changed

Ivenika [448]2 years ago

4 0

The answer is (8, -2)

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A triangle has a side length of 10 inches and a side length of 3 inches. What could be the length in inches of the third side of

Leya [2.2K]

I think u need to multiply I don’t really know

4 0

1 year ago

Help pls and thank uu

natka813 [3]

Answer:

$for~x=3$

$f(x)=-5$

$So,f(3)=-5$

<h3><u>--------------------------</u></h3><h3><u>hope it helps...</u></h3><h3><u>have a great day!!</u></h3>

8 0

3 years ago

Solve the system of equations.

guajiro [1.7K]

Answer:

<u>Option b. (x = 3, y = 20, z = -14)</u>

Step-by-step explanation:

Given:

2x + 2y + 3z = 4

5x + 3y + 5z = 5

3x + 4y + 6z = 5

Solve using Cramer’s rule

∴ $\left[\begin{array}{ccc}2&2&3\\5&3&5\\3&4&6\end{array}\right] =\left[\begin{array}{ccc}4\\5\\5\end{array}\right]$

∴A = $\left[\begin{array}{ccc}2&2&3\\5&3&5\\3&4&6\end{array}\right] = -1$

Ax = $\left[\begin{array}{ccc}4&2&3\\5&3&5\\5&4&6\end{array}\right] = -3$

Ay = $\left[\begin{array}{ccc}2&4&3\\5&5&5\\3&5&6\end{array}\right] =-20\\$

Az = $\left[\begin{array}{ccc}2&2&4\\5&3&5\\3&4&5\end{array}\right] = 14$

∴ x = Ax/A = -3/-1 = 3

y = Ay/A = -20/-1 = 20

z = Az/A = 14/-1 = -14

<u>So, the answer is option b. (x = 3, y = 20, z = -14)</u>

4 0

3 years ago

a circular fountain has a radius of 9.4 feet. find its diameter and circumference to the nearest tenth.

Leni [432]

Diameter is 2r, or 18.8 ft

Circumference is 2*pi*r, or 59.1 ft

3 0

3 years ago

Read 2 more answers

If average of m numbers is n^2 and average of n numbers is m^2 then average of m+n numbers is

kkurt [141]

The sum of the m numbers divided by m (which is the average) equals n^2. Then, the sum of the m numbers equals mn^2.
The sum of the n numbers divided by n (which is the average) equals m^2. Then, the sum of the n numbers equals nm^2.
The average of m+n numbers which is the sum of the m numbers plus the sum of the n numbers divided by (m+n) equals (mn^2+nm^2)/(m+n). This is mn(n+m)/(m+n). Then the factor (m+n) can be ruled out and the result is mn.

4 0

3 years ago