MATHEMATICS MIDDLE SCHOOL

Which graph is correct? No horizontal shift,cosine, amplitude=2 and period of 2pi/3

Answers

Answer 1

Answer:

Answer:

cosine, amplitude=2 and period of 2pi/3 is shown in figure 1.

Step-by-step explanation:

COSINE FUNCTON

Cos function (or cosine function) in a triangle is the ratio of the adjacent side to that of the hypotenuse.

cosine α = Adjacent Side/Hypotenuse

Since its amplitude is 2 . So the value of cosine function at COSIN 0 will be 2 and its period will be 2pi/3.

The above described situation is rightly depicted in figure 1.

To know more about the cosine function click here

brainly.com/question/15161326

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Answer 2

Answer:

Answer:

# 1

Step-by-step explanation:

It is number one because if the Period is ( 2pi /3 ) them the middle of the function should be ( pi/3 ) and since the function is a cosine function, the graph should start at the top (2) instead of at 0.

Hope I helped!!

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If you answer ALL questions listed, you get a good amount of points (3 questions, 5 points each, 15 points total) :D

1) Which pair are solutions to the equation?

4xy + 8 = 36

A.
(7, 1) and (3, 2)

B.
(1, 7) and (7, 1)

C.
(1, 7) and (4, 9)

D.
(4, 9) and (3, 2)

2)
Which of the ordered pairs in the form (x, y) is a solution of this equation?

5x - y over 3 = 13,
(2, -9) (3, -6)

A.
The first is not a solution, but the second is.

B.

Both are solutions.

C.

The first is a solution, but the second is not.

D.

Neither is a solution.

3)
Which ordered pairs in the form (x, y) are solutions to the equation

7x – 5y = 28?

Choose all answers that are correct.

A.

(−6, −14)

B.

(−1, −7)

C.

(4, 10)

D.

(7, 9

Answers

1)

$4xy+8=36\n4xy=28\nxy=7$

We know that each coordinate (x,y) must therefore multiply to equal 7. The only numbers that multiply to 7 are 7 and 1, so B) is the correct answer.

2)

For this one, just plug in the coordinates they give you for x and y and see if either one works:

$5x-(y)/(3)=13\ \ \ \ \ \ \ (2,-9)\n5(2)-((-9))/(3)=13\n10-(-3)=13\n13=13$

So the first one is a solution. Now plug in the second one:

$5x-(y)/(3)=13\ \ \ \ \ \ (3,-6)\n5(3)-((-6))/(3)=13\n15-(-2)=13\n17=13$

Therefore, the first is a solution and the second isn't making C) the correct answer.

3)

For this one, just plug in the ordered pairs they give you and see which ones end up working:

$7x-5y=28\n\nA. (-6,-14)\n7(-6)-5(-14)=28\n-42+70=28\n28=28\n\nB.(-1,-7)\n7(-1)-5(-7)=28\n-7+35=28\n28=28\n\nC.(4,10)\n7(4)-5(10)=28\n28-50=28\n-22=28\n\nD.(7,9)\n7(7)-5(9)=28\n49-45=28\n4=28$

A) and B) are the only ones that work out, so those are the correct answers.

1. 4xy+8=36

4xy=28

xy=7

2. 5(2)-(-9)/3=13

10-(-3)=13

13=13

5(3)-(-6)/3=13

15-(-2)=13

17≠13

3. 7(-6)-5(-14)=28

-42+70=28

28=28

7(-1)-5(-7)=28

-7+35=28

28=28

7(4)-5(19)=28

28-50=28

-22≠28

7(7)-5(9)=28

49-45=28

4≠28

Hope this helps... :)

i pay £16.20 to travel to work each week. I work for 45 weeks each year. How much do I pay to travel to work each day

Answers

16.20 * 45 = $729.00

What is the perimeter of a square that has a side length of 4x+2

Answers

Simple...

perimeter, p, is p+p+p+p

In this case..

P=4x+2+4x+2+4x+2+4x+2

P=16x+8

To find the perimeter you must know x..but you don't have enough info.

Thus, your answer...P=16x+8.

What is 1.2 divides by 0.04?

Answers

1.2 divides by 0.04 is 30.

What is division?

The division is one of the four basic mathematical operations, the other three being addition, subtraction, and multiplication.

Now it is given that,

1.2 divides by 0.04

Converting them into simpler form we get,

1.2 = 12/10 = 12 * 10⁻¹

and,

0.04 = 4/100 = 4 * 10⁻²

Dividing both the terms,

1.2 ÷ 0.04 = 12 * 10⁻¹ ÷ 4 * 10⁻²

Taking alike terms together we get,

1.2 ÷ 0.04 = (12 ÷ 4 ) * (10⁻¹ ÷ 10⁻²)

⇒ 1.2 ÷ 0.04 = (4*3 ÷ 4 ) * (10⁻¹ * 10²)

⇒ 1.2 ÷ 0.04 = (3 ) * (10⁻¹⁺²)

⇒ 1.2 ÷ 0.04 = (3 ) * (10)

⇒ 1.2 ÷ 0.04 = 30

which is the required answer.

Thus, 1.2 divides by 0.04 is 30.

To learn more about Division :

brainly.com/question/28032495

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1.2 divide by 0.04 equals 30

~please only answer if you know for sure~
-Thank you-

Answers

DF and AC are similar

and

BC and EF are similar sides

So make a proportion

$\sf{ (AC)/(DF) = (BC)/(EF) }$

Plug in the numbers

$\sf{ (9)/(DF) = (15)/(25) }$

Cross multiply

$\sf{DF * 15 = 9 * 25}$

Isolate DF and simplify it

$\sf{DF = 15}$

And so your final answer is

$\boxed{\bf{15 ~centimeters}}$

Which equation represents a parabola that opens upward, has a minimum value of 3, and has an axis of symmetry at x= 3?R2) = (x + 3)2 - 6
1 x) = (x + 3)2 + 3
2x) = (x - 3)2 - 6
OD. 10) = (x - 3y2 +3
Why