someone please help and explain asap will mark brainliest!!

Answer:

answer: he spent $120

Step-by-step explanation:

20×5=100

100+ the initial $20 spent = $120

Answer:

Sin O = [tex]\frac{2\sqrt{5} }{5}[/tex]

Cos O = [tex]-\frac{\sqrt{5} }{5}[/tex]

Cot O =  [tex]-\frac{1}{2}[/tex]

Csc O =  [tex]\frac{\sqrt{5} }{2}[/tex]

Sec O = [tex]-\sqrt{5}[/tex]

Step-by-step explanation:

Do you know the definitions of all the trig functions?  If not, you need to memorize them.  Also, you need to memorize which functions are positive in each quadrant.  All functions are positive in quad I, sine and reciprocal are positive in quad II, tan and reciprocal are positive in quad III, and cos and reciprocal are positive in quad IV.  OK?

Tan of  an angle is opposite side/adjacent side of a right triangle

If the tan O = - 2. let the opp. side = 2 and adjacent side = 1.  Then the hypotenuse = [tex]\sqrt{2^{2} + 1^{2} } = \sqrt{4 + 1} = \sqrt{5}[/tex]

Sine is positve and equals opp/hyp = [tex]\frac{2}{\sqrt{5} } = \frac{2\sqrt{5} }{5}[/tex]

Cos is negative and equals adj/hyp  =  [tex]-\frac{1}{\sqrt{5} } = -\frac{\sqrt{5} }{5}[/tex]

Cot is negative and is the reciprocal of the tan or adj/opp = [tex]\frac{-1}{2}[/tex]

Csc is positive and is the reciprocal of the sine or hyp/opp = [tex]\frac{\sqrt{5} }{2}[/tex]

Sec is negative and is the reciprocal of the cos or hyp/adj = [tex]-\sqrt{5}[/tex]

Answer:

Step-by-step explanation:

Answer:

Its the last one

Step-by-step explanation:

Your Welcome!

Step-by-step explanation:

Density=5250/4.5=1166.66 g/ml

Answer:

[tex]v = \frac{b \times h \times l}{2} \\ \frac{12 \times 6 \times 14}{2} \\ = 504[/tex]

Answer:

(31y² + 3y + 12) / 6y

Step-by-step explanation:

See photo below.

Feel free to ask any questions! :)

Answer:

1) 20: 25

2) 15: 3

Step-by-step explanation:

Answer:

Convert 300 L in 15 seconds to L/min a. ... 10) How many kilograms of water are in a standpipe containing 5678 L? a. ... tank volume if a pump is discharging a constant 60 litres per minute into the tank

Answer:

9 units

Step-by-step explanation:

The dotted line, which is the height, is labeled as 9, so it is 9 units.

Hope that helps!

Answer: 9 units

Step-by-step explanation: If you look at the question on the photo you see a dotted line with a 9 on it. On a triangle when you something like that you know it the actual height of the triangle

Answer:

1a, 2c, 3e, 4b, 5f, 6g

Step-by-step explanation:

i dont see the answer for 6, so i'm going with g

Answer:

1.A  2.C  3.E  4.B  5.F  6.G

Step-by-step explanation:

can i get brainliest plz

Answer:

180 - a = b and a + b = 180

Step-by-step explanation:

Answer:

its C

Step-by-step explanation:

Answer:

The equation is: 5(x+9) = 55

This basically means that five times the quantity x+9 is equal to 55.

Let me know if this helps!

Answer:

Step-by-step explanation:

9 = 3 * 3 = 3²

4x² = 2²x² = (2x)²

9 - 4x² = 3² - (2x)²     {a² - b² = (a + b)(a - b) ; a = 3 ; b = 2x}

          = (3 +2x)(3 - 2x)

Answer:

5x + 5

Step-by-step explanation:

(f + g)(x) = f(x) + g(x)

f(x) + g(x)

= 2x + 3 + 3x + 2 ← collect like terms

= 5x + 5

Answer:

Step-by-step explanation:

(f+g)(x)=f(x)+g(x)

(f+g)(x)=2x+3+3x+2

(f+g)(x)=5x+5

It looks like they want you to type just

5x+5

Answer:

RQ/PQ

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

its right

Answer:

x=10

Divide both sides of the equation by the same term,

then simplify

Answer:

- 2, - 1, 0, 1

Step-by-step explanation:

Consider the integers that satisfy each inequality

- 3 < x < 2

solutions are x = - 2, - 1, 0, 1

- 2 ≤ x ≤ 2

solutions are x = - 2, - 1, 0, 1, 2

Thus the integer values that satisfy both are common to both, that is

x = - 2, - 1, 0, 1

Answer:

12² + 24² = 36²

144 + 576 = 1296

720 ≠ 1296

12, 24, 36: NOT a right triangle

16² + 9² = 11²

256 + 81 = 121

337 ≠ 121

16, 9, 11: NOT a right triangle

20² + 29² = 21²

400 + 841 = 441

1241 ≠ 441

20, 29, 21: NOT a right triangle

12.5² + 7.5² = 10²

156.25 + 56.25 = 100

212.5 ≠100

12.5, 7.5, 10: NOT a right triangle

Answer: All of them are No

Step-by-step explanation: a^2+b^2=c^3

Answer: 1

Step-by-step explanation: you plug in -1 as x for g(x) and you use the answer from that (which is 6) and plug that into f(x)

The value of composite function (fog)(-1) = 10/3.

A function whose values are obtained from two given functions by first applying one to an independent variable and then using the result to apply the second, and whose domain is made up of those independent variable values for which the first function's result falls within the second function's domain.

The two functions are given below:

f(x) = 8/x+2

g(x) = 4x² + 2

To evaluate the composite value  (fog)(-1), first solve for g(-1).

Put x = -1 in 'g' function

g(x) = 4x² + 2

g(x) = 4(-1)² + 2

      = 4 + 2

g(x)  = 6

Now, substitute the value of g(6) in 'f' function

f(x) = 8/x+2

f(6) = 8/6 + 2

     = 10/6

Therefore, the composite value (fog)(-1) = 10/3.

To know practical use of composite function, here

https://brainly.com/question/27891702

#SPJ2

Answer:

-8x^3 + 9x^2 - 28 (Last choice)

Step-by-step explanation:

The question is asking what f(x) - g(x) is.

Use the given equations and add/subtract like-terms,

-8x^3 +20x^2 - 5 - 11x^2 -23 = The solution above

Answer:

Pythagorean Theorem: a^2 + b^2 = c^2

12^2 + b^2 = 27^2

144 + b^2 = 729

b^2 = 585

b = 24.19

Let me know if this helps!

Answer:

15 is the answer

Step-by-step explanation: 9.0 divided by 0.6 = 15. Hope this help!!!