plz help i will mark brainliest

Answer:

The answer is A    cos(A)cos(B)

Step-by-step explanation:

I just took it

The expression which must fill in each blank space to complete step 3 is; Choice B; Cos(A)Cos(B).

From the task content; It follows that the mathematical evaluation is in a bid to derive the Trigonometric identity for Tan (A-B).

From observation, it follows that the required expression is; cos(A)sin(B). This is because upon division of each term by the expression, the result is as in Step 4.

Read more on Trigonometric identities;

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Answer:

u=UMMM  this is your teacher you should not be asking for your answers online you got a zero

Step-by-step explanation:

Answer:

9) -25/21

11) 14

Step-by-step explanation:

In each case, subtract the y-coordinates. Subtract the x-coordinates in the same order. Divide the difference in y by the difference in x.

9)

y-coordinates: -10 - 15 = -25

x-coordinates = 6 - (-15) = 21

slope = (difference in y)/(difference in x) = -25/21

11)

y-coordinates: -20 - 8 = -28

x-coordinates = 3 - 5 = -2

slope = (difference in y)/(difference in x) = -28/(-2) = 14

Answer:

Y=2x

Step-by-step explanation:

Answer:

Yep thats right

Step-by-step explanation:

y-intercept = (0, 4)

x-intercept = (3/4, 0)

1 - Find the slope

[tex]slope = m = \frac{rise}{run} = \frac{y_2~-~y_1}{x_2~-~x_1} = \frac {-11-10}{5-(-2)} = \frac {-21}{7} = -3[/tex]

2 - Plug the slope into y = mx + b and substitute a point into x and y to find the y-intercept, b, by isolating it.

y = mx + b

y = -3x + b

10 = (-3)(-2) + b

10 = 6 + b

-6   -6

4 = b

y-intercept = (0, 4)

3 - Rewrite the completed formula

y = -3x + 4

4 - Substitute 0 in for y to find the x-intercept

0 = -3x + 4

-4          - 4

-4 = -3x

-4/-3 = -3x/-3

 4/3 = x

x-intercept = (4/3, 0)

Answer:

Step-by-step explanation:

Step one:

given

principal=$7420

rate = 5.9%= 0.059

time = 20years

Step two:

Required

Final amount V

using the relation

[tex]V = Pe^{rt}[/tex]

Substituting we have

[tex]V = 7420e^{0.059*20}\\\\V=7420e^{1.18}\\\\V=7420*3.2543\\\\V=24147.456[/tex]

To the nearest cent

= $24147.50

The amount of money in the account after 20 years is $24147.50

Answer:

72

Step-by-step explanation:

You can use the 9s trick

Answer:

9x8=72

Step-by-step explanation:

9x5=45        5

9x3=27         +3=9

27+45=72

Answer: the answer to 1 is 2

Step-by-step explanation:

Given:

Amount saved in sale = $25

Sale price was 35% off the regular price.

To find:

The regular price of the tennis shoes.

Solution:

Let the regular price of the tennis shoes be x.

Sale price was 35% off the regular price.

[tex]Discount=\dfrac{35}{100}x[/tex]

Amount saved in sale = $25

[tex]0.35x=25[/tex]

Divide both sides by 0.35.

[tex]x=\dfrac{25}{0.35}[/tex]

[tex]x=71.42857[/tex]

[tex]x\approx 71.43[/tex]

Therefore, the regular price of the tennis shoes is $71.43.

Answer:

x=5

Step-by-step explanation:

a^2+b^2=c^2

a=4

b=3

c=x

4^2+3^3=x^2

16+9=x^2

25=x^2

5=x

Answer:

120 days

Step-by-step explanation:

7 days off x 4 days off = 28 days off, so you have to multiply 30 x 4 which equals 120

Answer: he is 11 years old

Step-by-step explanation: 44 divided by 4 = 11

Answer 44 divided by 4 (11)

Answer:

9

Step-by-step explanation:

so you write the expression 2.75+1.25x= ?

If we subsitute the X for 5(miles) the we'll have the expression 2.75+1.25(5)= ?

and if you simplify that you will get 9.

Answer:

Yes

Step-by-step explanation:

I mean it can if you use () and stuff

Answer:

yes, technically

Step-by-step explanation:

so you can do somthing like -5+7 and get 2

hopes this helps, have a good day!

Answer:

D

Step-by-step explanation:

5(x-4) = 3x + 4

5x-20 = 3x + 4

5x-3x-20= 4

2x=4 +20

2x=24

x=12

check answer by inserting 12 for x into original  equation.

5(12-4) = 3(12) +4

5(8) = 36 +4

40 = 40

Answer:

8 over 15

Step-by-step explanation:

you should get a calculator.

Answer:

8/15

Step-by-step explanation:

Answer: 25/100* 88

Step-by-step explanation:

Answer:

88?

Step-by-step explanation:

Answer: 243.25.

Step-by-step explanation: To divide by ten is to move the decimal point one digit to the left. Thus, 2432.5/10 is 243.25.

Answer:

The first one: if 2/3 is 12 then 1/3 is 6. 3/3 is 18. SO Jane had 18 stuffed animals  before the donation.

The second one: 25 students then 13 are men so 25-13 is 12. 12/25 as a percentage is 48%

Hope this helps!

Answer:

[tex]Section \: A. \\before \: the \: donation \ : jane \: had \: \boxed{18 \: (stuffed \: animals)} \\

Section B.\\

\boxed{the\: percentage\: of\: female\: student\: is\: \boxed{48 \%}}

[/tex]

Step-by-step explanation:

[tex]Section A.\\let \: the \: total \: animals \: be \to \: t_{a} \\ let \: the \: donated\: animals \: be \to \: d_{a} \\ then \to \\ if \: d_{a} = \frac{2}{3} (t_{a} ) : we \: can \: find \: t_{a} \: by \to \\ 12 = \frac{2}{3} (t_{a} ) \\ 2(t_{a} )= 12 \times 3 \\ t_{a} = \frac{36}{2} \\ \boxed{ t_{a} = 18.}

\\ \\

Section B.\\

let \: the \: total \: number\: of \: students\: be \: be \to \: t_{s} \\ let \: the \: number\: of \: male\: student\: be \: be \to \: m_{s} \\ then \to \\ if \: t_{s} = m_{s} +1 3 \: then \\

m_{s} = t_{s} -13\\

m_{s} = 25-13 \\

m_{s} =12 \\

hence \: percentage \: of \: girls \: is = \frac{12}{25} \times 100 \\

the \: percentage\: is \to \boxed{m_{s} = 48\%}

[/tex]

♨Rage♨

Answer:

[tex]y-1=\frac{5}{6}\left(x+8\right)[/tex]

I hope this is good enough:

Answer:

5x⁴ + 7x or x(5x³ + 7 )

Step-by-step explanation:

Given expression:

        5x⁴ - 7(-x )

To simplify this expression, we have to follow the order of operation PEMDAS;

Parentheses, Exponents, Multiplication, Division, Addition and Subtraction

  5x⁴ - 7(-x ) = 5x⁴ + 7x

               Since x is common to both terms;

                = x(5x³ + 7 )

So the simplified version can be 5x⁴ + 7x or x(5x³ + 7 )

Answer:

Number of protons

Step-by-step explanation:

The atomic number represents the number of protons that are in the nucleus. This says what chemical properties something has and where it is located on the periodic table.

Best of Luck!

Answer:B. Interval 56–63 63–70 70–77 77–84 84–91 91–98 Frequency 1 7 0 5 5 2

Because you want to really see the different kind of scores the person gets from the data.

Step-by-step explanation:

Answer: put it in the microwave

Step-by-step explanation:

Answer: 3,250

Step-by-step explanation:

Answer:

291.666666667

Step-by-step explanation:

one minute is 60 seconds

17500 divided by 60

291.666666667

Answer:

Step-by-step explanation:

given:  triangle EDC is right angle isosceles triangle,AD and BC is perpendicular to AB.

statement                      reason

1. in triangle AED and BEC

a.∠ADE=∠EBC                      a.given( AD and BC is perpendicular to AB)

b.∠AED+∠DEC=∠EBD+∠ECB   b. exterior angle of triangle is equal to two ∠AED =∠ECB                                 opposite interior angle and substracting  

                                                          (∠DEC=∠EBD=90°) from both side

c.ED=EC                                    c corresponding sides of equal angle in

                                                        isosceles triangle are equal

2 ∴ triangle AED  is congruent to BEC 2. by A.A.S axiom