idk this pls help don’t understand

Step-by-step explanation:

We know that tan=sin/cos, so tan(x+π/2)=

[tex]\frac{sin(x+pi/2)}{cos(x+pi/2)}[/tex]

Then, we know that sin(u+v)=sin(u)cos(v)+cos(u)sin(v),

so our equation is then

[tex]\frac{sin(x)cos(\pi/2)+cos(x)sin(\pi/2)}{cos(x+\pi/2)} = \frac{cos(x)}{cos(x+\pi/2) }[/tex]

Then, cos(u+v)=cos(u)cos(v)-sin(u)sin(v), so our expression is then

[tex]\frac{cos(x)}{cos(x)cos(\pi/2)-sin(x)sin(\pi/2)} = \frac{cos(x)}{-sin(x)} = -cot(x)[/tex]

Answer:

(3,5)

Step-by-step explanation:

Porque entre 10 e 0 e 8 e -2, existe um espaço 10, então para saber como coordenadas basta adicionar 5 a -2 e 0, e assim fica 3 e 5

Answer:

its B

Step-by-step explanation:

Answer:

b

Step-by-step explanation:

Answer:

c you choose 5 out of 6 people

Answer:

B y=-2/3x+3

Step-by-step explanation:

y=mx+b

y=-2/3x+3

Answer:

Step-by-step explanation: y= -2/3x+3

Answer:

Minimum-35

Maximum-50

Step-by-step explanation:

Sally can solve 35 questions in 5 hours and at most 70 question in 5 hours.

A ratio indicates how many times one number contain in another number. The ratio of two number is written as x : y, which is equivalent to x/y.

Where, x and y are individual amount of two quantities.

And, Total quantity gives after combine as x + y.

Given that,

Minimum number of questions sally can solve in 1 hour = 7

Maximum number of questions sally can solve in 1 hour = 10

Now minimum of of question sally can solve in 5 hour,

= 5x7

= 35 questions

And Maximum number of question she can solve in 5 hour,

= 5x10

= 50 questions.

Hence,

In 5 hours she can solve,

Minimum 35 questions

Maximum 50 questions.

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Answer:

-2.0, hope it helps

please make me brainliest

Step-by-step explanation:

-12 - 42 = - 6

-54 = - 6

-54 + 6 = - 48

I think 1 solution

parallogram it has exactly 2 pairs of congruent angles

Answer:

Parallelogram.

Step-by-step explanation:

Answer: 9

Step-by-step explanation:

x-3y

(3)-3(-2)

3+6

9

It is D i took the test!

Answer:

C. (-3, -10)

Step-by-step explanation:

First label the 2 equations.

y=5x +5 -----(1)

x= -3 -----(2)

subst. (2) into (1):

y= 5(-3) +5

y= -15 +5 (expand)

y= -10 (simplify)

Thus, the answer is (-3, -10).

Answer:

THe answer is C

Step-by-step explanation:A

As seen by the last answer when we substitute the variable we can get (-3,-10)

x=-3------(2)

y=5x+5-----(1)

y=5(-3)+5

y=-15+5

y=-10

so (-3,-10) is the correct answer

Answer:

umm is there something else we need to see

Answer:

x ≥ -15/2

Step-by-step explanation:

-2x - 4 ≤ 11

Add 4 to each side

-2x - 4+4 ≤ 11+4

-2x   ≤ 15

Divide each side by -2, remembering to flip the inequality since we are dividing by a negative

-2x/-2 ≥ 15/-2

x ≥ -15/2

Answer:

x≤-7.5

Step-by-step explanation:

-2x - 4 ≤ 11

Add 4 to both sides

-2x≤15/-2

Divide

x≤-7.5

Answer:

B

Step-by-step explanation:

Answer:

a. 85.5 sq ft

b. 3 bottles

Step-by-step explanation:

a. The cardboard is rectangular in shape. How much he needs to paint is the same as the cardboard that he needs to paint.

The area of a rectangle is given as:

A = L * B

where L = length and B = breadth

Therefore, the area of the cardboard having dimensions 14 1/4 feet by 6 feet is:

A = 14 1/4 * 6

A = 57 / 4 * 6 = 85.5 sq feet

He needs to paint 85.5 sq feet of the cardboard.

b. On bottle of paint covers 40 sq feet. The number of bottles he will need for his backdrop will be the area he needs to paint divided by the amount of paint that can cover 40 sq feet:

85.5 / 40 =  2.14

Since the number of bottles he will need is a whole number and its greater than 2, then it must be 3.

To paint the entire cardboard, he must have 3 bottles of paint.

Answer:

75 feet

Step-by-step explanation:

Answer:

r = 1.0 cm to the nearest tenth

Step-by-step explanation:

The formula for the area of a circle of radius r is A = (pi)r².  So, from the given information we need to determine the radius of the orange.  The volume formula is V = (4/3)(pi)r³ and in this case V = 113.1cm³.  Thuis,

(4/3)(pi)r³ = 113.1cm³

                                                3                              3(113.1 cm³)

Multiplying both sides by ------------ , we get r³ = --------------------- , and so

                                              4(pi)                                12.57

r³ = 339.3 cm³ / 12.57 ≈ 0.997, so that r ≈ ∛(0.997 cm³) ≈ 0.9999, or

r = 1.0 cm to the nearest tenth.

Answer:

10.5 cm

Step-by-step explanation:

Volume = base area × height

798 = (9.5 × 8) × height

height = 798/76

height = 10.5

Answer:

The answer is 10.5

Step-by-step explanation:

I got it correct on edge 2021

Answer:

60°

..................

Answer:

Dear mate your answer is 60

The expression into an equivalent form [tex]5^{10} \times 5^5[/tex] is  [tex]5^{15}[/tex].

Those expressions that might look different but their simplified forms are the same expressions are called equivalent expressions.

To derive equivalent expressions of some expressions, we can either make it look more complex or simple. Usually, we simplify it.

We need the expression into an equivalent form.

This expression could also be given by;

[tex]5^{10} \times 5^5[/tex]

Now plug the values then we get;

[tex]5^{10} \times 5^5\\\\= 5^{10+ 5} \\\\= 5^{15}[/tex]

Hence, the expression into an equivalent form [tex]5^{10} \times 5^5[/tex] would be; [tex]5^{15}[/tex]

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Answer:

vertex is (3,-4)

axis of symmetry is x=3

the Domain is all real numbers

the Range is all real numbers greater than or equal to -4

when x < 3, y increases as x decreases

when x > 3, y increases as x increases

Please mark as brainliest if this helped!

Answer:

8

Step-by-step explanation:

23 + (-7) =16

16/2 = 8

Answer: 8

Step-by-step explanation:

23+(-7) = 16/2 = 8

Answer:

-1 2/6

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

The problem states

Let's call [tex]x[/tex] one kilogram bananas and [tex]y[/tex] one kilogram oranges. The cost is related by

[tex]x=2y[/tex]

Also, we know by given

[tex]45x+30y=360[/tex]

Replacing the first equation into the second one, we have

[tex]45(2y)+30y=360\\90y+30y=360\\120y=360\\y=\frac{360}{120}\\ y=3[/tex]

Then, we find the other value

[tex]x=2(3)=6[/tex]

Therefore, one kilogram of oranges cost $3.

Answer:

The distance from station A to the fire is 90.4 miles

The distance from station B to the fire is 95.6 miles

Step-by-step explanation:

Given that 2 fire stations are 100 miles apart.

Station A = N 55°E

Station B = S 60°E

To find the distance of the fire from each station, let's use the law of sines,

From the diagram, our values are:

A = 55°

B =  60°

Let's take C as point of fire.

Since the total sum of angle in a triangle is 180,

A+B+C=180

C = 180 - A - B

C = 180 - 55 - 60 = 65°

For station A.

[tex] \frac{Sin A}{a} = \frac{Sin C}{c} [/tex]

[tex]\frac{Sin55}{a} = \frac{Sin65}{100}[/tex]

[tex]a = \frac{Sin55 * 100}{Sin65}[/tex]

[tex]a = 90.38[/tex]

The distance from station A to the fire is 90.4 miles

For station B:

[tex] \frac{Sin B}{b} = \frac{Sin C}{c} [/tex]

[tex]\frac{Sin60}{b} = \frac{Sin65}{100}[/tex]

Solving for b, we have:

[tex]a = \frac{Sin60 * 100}{Sin65}[/tex]

[tex]a = 95.6[/tex]

The distance from station B to the fire is 95.6 miles

Answer:

total area of the garden and walkway = 2a² + 21a + 54

Step-by-step explanation:

The walkway surrounds the rectangular garden. The width of the garden is 9 ft and the length is 12 ft. Since the width of the walkway around the garden is the same on every side let us use a to represent the width around the garden.

The garden is rectangular and the width of the walkway around the garden is uniform. The width added on both end of the width of the rectangle will be 2a while the width added to the both length of the rectangle will be 2a also.

Therefore

total area of the garden and walkway = length × width

length of garden and the walkway = 2a + 12

width of garden and the walkway = 2a + 9

total area of the garden and walkway = (2a + 12)(2a + 9)

total area of the garden and walkway = 4a² + 18a + 24a + 108

total area of the garden and walkway = 4a² + 42a + 108

divide through by 2

total area of the garden and walkway = 2a² + 21a + 54

Answer:

K'(2, 1 )

Step-by-step explanation:

Under a reflection in the y- axis

a point (x, y ) → (- x, y ), thus

K(- 2, 1 ) → K'(2, 1 )

A - Trust me, its A

The people above are wrong

Answer:

1: two sides and angle of one triangle are congruent.

Step-by-step explanation:

The triangles are congruent because two sides and the generated angle of a triangle correspond to their respective sections. If two angles and the side used in one triangle are identical.

Hope this helps

Answer:

#4

Step-by-step explanation:

p+n=26

.01p+.05n=.34

graph it out by desmos...?

you'll get the coordinates (24,2)

The number of pennies and nickels chiara has is 24 pennies and 2 nickels; the correct option is 4

The solution of an equation refers usually to the values of the variables involved in that equation which if substituted in place of those variable would give a true mathematical statement.

Let;

p = the number of penny coins

n = the number of nickel coins

Remember;

1 penny = $0.01

1 nickel = $0.05

Chiara has 26 coins that equal 34 cents

so, p + n = 26

isolate the variable x;

p = 26 - n...equation(1)

34 cents=$0.34

0.01p + 0.05n = 0.34

Multiply by 100 both sides;

1p + 5n =$34

isolate the variable x;

p = 34 -5n...equation(2)

Create a table  to guess;

Assume  different values of n and determine the value of p in equation 1 and equation 2

The solution is when the value of p in the equation 1 must be equal to the value of p in equation 2

For n=1;

equation 1; p = 26-1 = 25

equation 2; p = 34-5(1)= 29

29 is not equal to 25

For n=2

equation 1; p= 26-2 = 24

equation 2; p= 34-5(2) = 24

24=24

Hence, the answer is (2,24)

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Answer:

12

Step-by-step explanation:

1. Write out s+14=26

2. Subtract 14 by both sides to isolate s.

3. s = 12

Answer:

s = 12

Step-by-step explanation:

s + 14 = 26

  - 14   - 14         Subtract 14 from both sides

s = 12

Plug this back into the equation to make sure it works

12 + 14 = 26        Add

26 = 26               This solution does work

Answer:

1 and 1/4

Step-by-step explanation:

40/32 divided by 8 = 5/4

5 divided by 4 = 1 R1

5/4 = 1 1/4