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3 years ago

How do you rotate 90 degrees counterclockwise about the origin?

Mathematics

1 answer:

andriy [413]3 years ago

5 0

When rotating 90 degrees counterclockwise about the origin, the original coordinates are changed according to the rule (-y, x). Therefore, we take the original coordinates and switch them up accordingly to the rule listed above. When we do so, we get the coordinates Z'(4,0); J'(2,-5); L'(3,0). Hope this helps and have a phenomenal day!

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Shannon is planning to tile a rectangular kitchen countertop that is 24 inches wide and 64 inches long. She determined that 1 ti

kow [346]

Answer:

Step-by-step explanation:

$\frac{24*64}{4*4}=96\\$

$\frac{24}{4}=6, \frac{64}{4}=16\\6*16=96$

7 0

3 years ago

If p, q are zeroes of polynomial f(x) =2x^2-7x+3,find the value of p^2+q^2

Elza [17]

Answer:

p^2 + q^2 = 22/9.

Step-by-step explanation:

For a quadratic function ax^2 + bx + c if the zeroes are A and B then

A + B = -b/a and AB = c/a.

2x^2 - 7x + 3

Now p and q are the zeroes of the above function so

p + q = 7/3 and pq = 3/2.

Now p^2 + q^2 = (p + q)^2 - 2pq

= (7/3)^2 - 2* 3/2

= 49/9 - 3

= 49/4 - 27/9

= 22/9.

4 0

3 years ago

Divide 128 chairs among 3 rooms in the ratio of 1 : 3 : 4.

Alex_Xolod [135]

Answer:

Step-by-step explanation:

1x+3x+4x= 128

8x=128

x=128/8

x=16

therefore,

room 1 = 1x

= 1*16=16

room 2 = 3x

=3*16=48

room 3 = 4x

=4*16=64

PLS MARK BRAINLIEST, THNX

6 0

2 years ago

Classify the decimal forms of 3/12 and and 2/9 as repeating or as repeating or terminating.

andre [41]

Answer:

3/12: terminating; 2/9: repeating

Step-by-step explanation:

3/12=0.25 terminating as it has a finite number of digits after the decimal point.

2/9=0.222.... repeating decimal as its number is repeated indefinitely.

6 0

3 years ago

If x^2-13x+42=(x+A)(x+B), then find the value of 3A-B

tigry1 [53]

Answer:

- 11 or - 15

Step-by-step explanation:

Factorise

x² - 13x + 42

Consider the factors of the constant term (+ 42) which sum to give the coefficient of the x- term (- 13)

The factors are - 6 and - 7, since

- 6 × - 7 = + 42 and - 6 - 7 = - 13, thus

x² - 13x + 42 = (x - 6)(x - 7)

compare to (x + A)(x + B)

A = - 6, B = - 7

thus 3A - B = 3(- 6) - (- 7) = - 18 + 7 = - 11

The factors may also be expressed as (x - 7)(x - 6)

with A = - 7 and B = - 6, then

3A - B = 3(- 7) - (- 6) = - 21 + 6 = - 15

5 0

3 years ago