Help me step by step serious answers please

Answer: 4.50

Step-by-step explanation:

Pay attention in math class

Answer:x+7.50 is less than or equal to 12

Step-by-step explanation: x is less than or equal to 4.5

Answer:

1

Step-by-step explanation:

you have to minus the 7 by 6 which you get from adding all the other numbers up together

Given:

[tex]\cos 15^{\circ}[/tex]

To find:

The exact value of cos 15°.

Solution:

[tex]$\cos 15^{\circ}=\cos\frac{ 30^{\circ}}{2}[/tex]

Using half-angle identity:

[tex]$\cos \left(\frac{x}{2}\right)=\sqrt{\frac{1+\cos (x)}{2}}[/tex]

[tex]$\cos \frac{30^{\circ}}{2}=\sqrt{\frac{1+\cos \left(30^{\circ}\right)}{2}}[/tex]

Using the trigonometric identity: [tex]\cos \left(30^{\circ}\right)=\frac{\sqrt{3}}{2}[/tex]

            [tex]$=\sqrt{\frac{1+\frac{\sqrt{3}}{2}}{2}}[/tex]

Let us first solve the fraction in the numerator.

            [tex]$=\sqrt{\frac{\frac{2+\sqrt{3}}{2}}{2}}[/tex]

Using fraction rule: [tex]\frac{\frac{a}{b} }{c}=\frac{a}{b \cdot c}[/tex]

            [tex]$=\sqrt{\frac {2+\sqrt{3}}{4}}[/tex]

Apply radical rule: [tex]\sqrt[n]{\frac{a}{b}}=\frac{\sqrt[n]{a}}{\sqrt[n]{b}}[/tex]

           [tex]$=\frac{\sqrt{2+\sqrt{3}}}{\sqrt{4}}[/tex]

Using [tex]\sqrt{4} =2[/tex]:

           [tex]$=\frac{\sqrt{2+\sqrt{3}}}{2}[/tex]

[tex]$\cos 15^\circ=\frac{\sqrt{2+\sqrt{3}}}{2}[/tex]

Answer:

3,006.0578‬ is your answer.

Step-by-step explanation:

3   ×   1000   +   6   ×   100   +   3   ×   10   +   7   ×   0.1   +   2   ×   100   +   8   ×   0.0001 =‬ 3,006.0578‬

Answer:3630.728

Step-by-step explanation:

Answer:

[tex]\huge\boxed{\dfrac{34}{51}=\dfrac{2}{3}}[/tex]

Step-by-step explanation:

[tex]\dfrac{34}{51}\\\\34=17\cdot2\\51=17\cdot3\\\\LCM(34,\ 51)=17\qquad/\text{Largest Common Multiple}/\\\\\dfrac{34}{51}=\dfrac{34:17}{51:17}=\dfrac{2}{3}[/tex]

Answer:

Step-by-step explanation:

2

—

3

Answer:

Answer C.12

Step-by-step explanation:

v/V=(h/H)^3

1/8=(h/24)^3

1/8=h^3/24^3

1/8=h^3/13824

8h^3=13824

H=1728√3

h= \sqrt[3]{1728}

h=12 cm

the height of the smaller pyramid is 12 inches.

A triangular pyramid is a 3D geometric shape in which all the three lateral faces are triangles with a common vertex. If all the three triangular faces are equilateral, then such a pyramid is called a tetrahedron.

For the given situation,

The ratio of the volumes of two geometrically similar pyramids = 1:8

The height of the larger pyramid = 24 inches.

Let the volume of smaller pyramid be v1 and larger pyramid be v2.

Let the height of smaller pyramid be h1 and larger pyramid be h2.

The relation between the volume of pyramid and height is given as

[tex]v=\frac{1}{3} (base area)(height)[/tex]

Let us consider the triangle to be equilateral triangle. So all the sides are equal.

We know that, Base area = [tex]a^{2}[/tex] and [tex]a=h[/tex]

The volume becomes [tex]v=\frac{1}{3} h^{3}[/tex]

The ratio becomes,

⇒ [tex]\frac{v1}{v2} =\frac{h1^{3} }{h2^{3}}[/tex]

⇒ [tex]\frac{1}{8} =\frac{h1^{3} }{24^{3}}[/tex]

⇒ [tex]h1^{3}=\frac{24^{3} }{8}[/tex]

⇒ [tex]h1^{3}=\frac{13824 }{8}[/tex]

⇒ [tex]h1^{3}=1728[/tex]

⇒ [tex]h1=\sqrt[3]{1728}[/tex]

⇒ [tex]h1=12[/tex]

Hence we can conclude that the height of the smaller pyramid is           12 inches.

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Answer:

The answer is 43 minutes I'm pretty sure.

Answer:

43 mins

Step-by-step explanation: All you have to do is subtract 57 from 14 then you will get your amount of time. And that is all you have to do

Answer:

Yes

Step-by-step explanation:

A tangent has one point touching the circle and is always perpendicular to the radius drawn in as well. Therefore line AB is tangent to the circle and creates a right triangle.

I think c

Step-by-step explanation:

Answer: C. answering the last two questions correctly

Step-by-step explanation: If each question were worth 3 points if he got it correctly then he would have to get 2 questions right since he has -6

Final answer:

Both vendors cost about the same for 20 pairs of soccer shoes.

Explanation:

For Sports Shoe Warehouse, the cost for 11 pairs is $1100, and each additional pair costs $66. So, the total cost for x additional pairs would be $1100 + $66x.

For Winning Team Shoes, the cost for 11 pairs is $825, and each additional pair costs 6% more than the previous pair. So, the total cost for x additional pairs would be $825 + 0.06(825)x.

To find when both vendors cost the same, we set their expressions equal: $1100 + $66x = $825 + 0.06(825)x. Solving for x gives x = 20. Therefore, both vendors cost about the same for 20 pairs of soccer shoes.

Answer:

-1500

Step-by-step explanation:

"descends," means to go down (ascend means to go up), so the number would be negative. The number given is 1500, so we use that, and get -1500.

Answer:

-1500

Step-by-step explanation: Descending means "going down" negative numbers are below normal. They had descended  from the normal numbers.

question 1: 35%

question 2: 0.23

question 3: 9/20

question 4: 1,360 mL

question 5: 1,994 yds

Answer:

1. 35%

2. 2.3

3. 9/20

4. 1360 ml

5. 1994 Yards

Answer:

An interest rate is the amount of interest due per period, as a proportion of the amount lent, deposited or borrowed. The total interest on an amount lent or borrowed depends on the principal sum, the interest rate, the compounding frequency, and the length of time over which it is lent, deposited or borrowed.

Answer:

I know I am late to answer but here is the right answer

X=26

Step-by-step explanation:

since 2x and 3x are on the same side of the equation you can combine the to get 5x+50=180. Then you subtract 50 from both sides of the equation witch you would get 5x on one side of the equation and 130 on the other. The you would divide 5x from both sides. 5x and 5 cancel out so you are left with 130 divide by 5x. You the divide which gives you the answer of X=26.

Answer:

7.30

Step-by-step explanation:

T = 2π √(L/32)

3 = 2π √(L/32)

3/(2π) = √(L/32)

(3/(2π))² = L/32

L = 32 (3/(2π))²

L ≈ 7.30

The length of the pendulum in feet nearest to hundredth is 7.29 feet.

Two algebraic expressions having same value and symbol '=' in between are called as an equation.

Given that the equation for the time of one swing of a pendulum is

T = 2π √(L/32).

And pendulum makes one swing in 3 seconds.

Now T is 3 second.

So , substituting the value of T in given expression;

3 = 2π √(L / 32)

3 / (2π) = √(L / 32)

Taking square on both sides,

{ (3/(2π) }² = L / 32

L = 32 × { 3 / (2π) }²

L = 7.295

L ≈ 7.29

Therefore, the length of the pendulum in feet nearest to hundredth is 7.29 feet.

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Step-by-step explanation:

2x + 2y = 3 ( x2 for everything in the equation)

x - 4y = -1

4x+ 4y = 6

x - 4y = -1

Add the 1st line to the 2nd line to get rid of the y:

5x = 5

x - 4y = -1  ( you can pick any line from this system to be the second equation in this step, you can put 2x + 2y = 3 or 4x+ 4y = 6, anything above this step, but to make it simple chose the one you think is the easiest)

Solve for x, then plug the x value into the 2nd equation

x = 1

1 - 4y = -1

x = 1

-4y = -2 =) y = 1/2

x = 1

y= 1/2

Answer:

3x^3

Step-by-step explanation:

57/19=3

x^5 - x^2 = x^3

Answer:

3x^3

Step-by-step explanation:

You have to divide 15 over nineteen, which is 3x with the exponent of 5 over x with the exponent of 2. Then you have to apply the exponent rule and subtract the exponents:5-2, which would give you 3x with the exponent of 3

Answer:

11 1/4 or 11.25.

Step-by-step explanation:

Answer:

A) no solution

Step-by-step explanation:

Parallel lines never intersect

Answer:

80% agree because 4/5= 80/100

Step-by-step explanation:

Answer:

100 pi (314.16)

Step-by-step explanation:

Because the diameter is 20 in, that makes the radius = 20/2 inches = 10 inches.

10^2 * pi = area

100 pi =  area

314.16 is approx. area.

Answer:

It should be 1,256.6 in square inches

Step-by-step explanation:

Answer:

Answer is A

Step-by-step explanation:

Reasons

The information that would prove that DEFG is an isosceles trapezoid is

DE ≅ GF.

An isosceles trapezoid is a trapezoid in which the base and it's opposite side are parallel and the length of the non-parallel sides are same.

Here, the given trapezoid:

the coordinates of the points D and G are (- 2, 2) and (1, 2) respectively.

the coordinates of the points E and F are (- 2, 2) and (1, 2) respectively.

Therefore, it is clear that the base of the given trapezoid EF and it's opposite side DG are parallel.

Therefore, the given trapezoid would be isosceles, if DE and GF are equal.

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Answer:

[tex]12[/tex]

Step-by-step explanation:

Step 1:  Set x to 3 and solve

[tex]4x[/tex]

[tex]4(3)[/tex]

[tex]4 * 3[/tex]

[tex]12[/tex]

Answer:  [tex]12[/tex]

Answer:

9 cm tall

Step-by-step explanation:

The formula to find the volume of a cylinder is

V = pi r^2 (h)

pi r^2 is the base

Plug in the volume and the base

198 = 22 (h)

divide by 22

9 = h

Answer:

what is the question

Step-by-step explanation:

Answer:

OK UMMMM CAN YOU PUT THEE QUESTION

Step-by-step explanation:

Answer:

72, 90, 110, 132, 156

Step-by-step explanation:

The pattern goes, (56+16), (72+18), (90+20), (110+22), (132+24), (156+26), etc.

With the beginning pattern of +6, add +2 to each +6 for the following numbers.

Answer:

[tex]a_n=(n+1)(n+2)[/tex]

Step-by-step explanation:

Notice that the terms given in the sequence are the products of two consecutive numbers as follows:

[tex]a_1=6=2*3\\a_2=12=3*4\\a_3=20=4*5\\a_4=30=5*6\\a_5=42=6*7\\a_6=56=7*8\\a_7=72=8*9[/tex]

Therefore, we can write the nth term of the sequence as the product of a number and its consecutive, starting with the factor "2" for the first term instead of "1", thus making:

[tex]a_n=(n+1)(n+2)[/tex]

Step-by-step explanation:

log 47.2 in four decimal places

= 1.6739

Final answer:

To find log 47.2 to four decimal places, use the logarithmic function. The result is approximately 1.6739

Explanation:

To find log 47.2 to four decimal places, we need to use the logarithmic function. The logarithm function is the inverse of exponentiation. In this case, we are looking for the logarithm of 47.2.

Using a scientific calculator or logarithmic tables, we can find that log 47.2 ≈ 1.6739 to four decimal places.

The four decimal places are determined by the precision of the logarithm function and the number of significant figures in the input value (47.2 has four significant figures).

Answer:

14 -2i

Step-by-step explanation:

9 + sqrt(-4) - ( -5 + sqrt(-16))

We know the sqrt of a negative number is i * sqrt(number)

9 + isqrt(4) - ( -5 + isqrt(16))

9 + 2i - (-5 + 4i)

Distribute the negative sign

9+2i +5 -4i

Combine like terms

14 -2i