Find the value of this expression if x = 7 and
y = 1
xy^2/-8

(sin²(x) - 1)/cos(x) = -1

-cos²(x)/cos(x) = -1

-cos²(x) = -cos(x)

cos²(x) - cos(x) = 0

cos(x) (cos(x) - 1) = 0

Then it follows that cos(x) = 0 or cos(x) = 1. But if cos(x) = 0, then the original expression on the left side of the equation would be undefined. Then C is the only valid solution.

Answer:

First Person

Step-by-step explanation:

hope it help

brainliest moko HAHA

Step-by-step explanation:

it is too easy for me .isn't it thank you bye bye.

Se debe remover aproximadamente 140.848 centímetros cúbicos de madera para reducir las esferas a anillos con altura de 6 centímetros.

En esta cuestión se precisa calcular el volumen de la esfera y sustraer los volúmenes de dos casquetes esféricos de igual cantidad [1] y un cilindro recto respectivo a la operación de taladrado. [2] La cantidad de madera a remover queda definida por la siguiente expresión:

[tex]V = \frac{2\pi}{3}\cdot h^{2}\cdot (3\cdot R - h) + \pi\cdot r^{2}\cdot (2\cdot R-2\cdot h)[/tex] (1)

Donde:

Si sabemos que [tex]h = 1\,cm[/tex], [tex]R = 4\,cm[/tex] y [tex]r = 2.5\,cm[/tex], entonces la cantidad de madera a remover es:

[tex]V = \frac{2\pi}{3}\cdot (1\,cm)^{2}\cdot [3\cdot (4 \,cm) - 1\,cm] +\pi\cdot (2.5\,cm)^{2}\cdot [2\cdot (4\,cm)-2\cdot (1\,cm)][/tex]

[tex]V \approx 140.848\,cm^{3}[/tex]

Se debe remover aproximadamente 140.848 centímetros cúbicos de madera para reducir las esferas a anillos con altura de 6 centímetros.

Invitamos cordialmente a consultar esta pregunta sobre volúmenes: https://brainly.com/question/16127188

Answer:

4x2 + 5 +

Step-by-step explanation:

please mark me brainliest please

Answer:

The second answer choice is correct.

Step-by-step explanation:

4x + 5 + 13/x+5 (This is correct on edge.)

Answer:

D

Step-by-step explanation:

Distribute 10 in the equation

10 x 3 + 10 x 4 = 70

Answer D. 10(3+4)

10(3+4)

30+40

Step-by-step explanation:

in addition to a label what other piece of information must the axis on a graph include

Answer:

87, 88, 89

Step-by-step explanation:

x + x+1 + x+2 = 264

3x + 3 = 264

3x = 264 - 3

x = 261/3

x = 87

9514 1404 393

Answer:

  3

Step-by-step explanation:

This is basically a calculator problem, though you can do it in your head. Follow the order of operations.

  [tex]\dfrac{\sqrt{144}}{\sqrt[5]{243}}-5+16\div\sqrt[3]{64}=\dfrac{12}{3}-5+\dfrac{16}{4}\\\\=4-5+4=\boxed{3}[/tex]

Answer:

3

Step-by-step explanation:

(√144/ ^5√243/) - 5 + 16 ÷ (³√64) =

12/3 -5 +16÷ 4 =

4 - 5 + 16 ÷ 4 =

-1 + 4 =

3

Answer:

14/15 is the best answer

Step-by-step explanation:

Calculator?

Answer:

9333/10000

Step-by-step explanation:

Answer:

180 cm²

Step-by-step explanation:

x = length

y = width

perimeter of a rectangle is the sum of all sides, so, 2×length plus 2×width.

x = 5y

72 = 2x + 2y

using the first equation as substitute in the second equation

72 = 2×(5y) + 2y = 10y + 2y = 12y

y = 6 cm

x = 5y = 5×6 = 30 cm

area = x × y = 30 × 6 = 180 cm²

[tex]\dfrac{1}{2}:8=\dfrac{1}{2}\cdot\dfrac{1}{8}=\dfrac{1\cdot1}{2\cdot6}=\dfrac{1}{16}[/tex]

Answer:

y =-5x-17

Step-by-step explanation:

Slode-intercept is

y = mx + c

The first step is to find the slope, that is the m

To do that, use this formula

Y2 - y1

------------

X2- x1

And u will get - 5

Now since u got m, u also actually have y and x, those are the coordinates they gave u. U can choose either one,(-3, - 2) or (-4, 3), cuz they would give u the same answrs

So let's say I chose (-4, 3)

So x = - 4, y = 3

y=mx +c

3= - 5(-4) +c

C = - 17

Therefore your end product will be

y = - 5x - 17

Answer:

x > -1/3

Step-by-step explanation:

so first we are going to distribute the numbers outside of the parenthesis. which gives us the equation

18-9x-8+12x > 9

then we are going to add our like terms

so 12x + -9x gives us 3x

and 18 + -8 gives us 10

so it would gives us the equation 3x+10>9

we then subtract 10 from both sides to keep our numbers on the right which gives us

3x > -1

then we divide by 3 on both sides to get X

and we then get X > -1/3

Answer:

8/9

Step-by-step explanation:

5/6 x 2/3 = 10/18 (5/9 reduced)

5/9 x 8/5 = 40/45 ( 8/9 reduced)

Answer:

A

Step-by-step explanation:

Answer:

Step-by-step explanation:

There are 26 possibiliteis of the first and last initials. So there are [tex]26\times 26[/tex] different initials.

So the smallest class size to ensure the Prof to use different system is [tex](26\times 26)+1[/tex] since there must be two people in this class with the same first and last initials.

Step-by-step explanation:

8.D

9.D

10.B

11. 120

12.C

13.D

14a.95

14b.180

15.5

Answer:

3.2 cm

Step-by-step explanation:

800 m = 80000 cm (as every meter has 100 cm).

now, on the map that distance goes down 1/25000th of the original distance.

so,

80000 / 25000 = 80/25 = 16/5 = 3 1/5 = 3.2 cm

Answer:

[tex] \sqrt{7x + 2} \\ [/tex]

for answer please see

Answer:

Marcia's cord will begin to stretch after [tex]2.24\:\rm{s}[/tex].

Step-by-step explanation:

The expression used to find displacement is given as,

[tex]s=ut+\dfrac{1}{2}at^{2}[/tex]

The initial velocity of Marcia before leaping is zero, so [tex]u=0\:\rm{m/s^{2}}[/tex].

Marcia travels under the influence of gravity and fall freely so the acceleration due to gravity is only acceleration responsible for her movement.

The value for [tex]g[/tex] is [tex]10\:\rm{m/s^{2}}[/tex](approximately) and when it is converted in [tex]\:\rm{ft/s^{2}}[/tex], it is [tex]32\:\rm{ft/s^{2}}[/tex].

Substituting the values, the distance that Marica travels under influence of gravity for [tex]t[/tex] seconds is,

[tex]\begin{aglined}s&=ut+\dfrac{1}{2}at^{2}\\s&=(0)t+\dfrac{1}{2}gt^{2}\\s&=0+\dfrac{1}{2}(32)t^{2}\\s&=16t^{2}\end{aligned}[/tex]

The bungee cord begins to stretch after Marcia has fallen [tex]80\:\rm{ft}[/tex], so

[tex]\begin{aligned}s&=16t^{2} \\80&=16t^{2} \\t^{2} &=5\\t&=2.24\:\rm{s}\end{aligned}[/tex]

Answer:

2

Step-by-step explanation:

To find common ratio, divide a term from it's previous term.

a2/a1 = Common ratio

16/8 = 2

So 2 is answer.

Here we have a problem of composition of functions.

Remember that:

(f ° g)(x) = f( g(x) )

Now we have the table:

x      | 1 2 3 4 5 6

f(x)   | 6 4 4 1 6 4

g(x)  | 5 5 2 1 4 3

Using the table, we want to find:

To read the table, for example for f(5) first you go to the "x" part of the table and find the 5.

Now you go to the f(x) table and see which is the value of f(5), in this case, we can see that f(5) = 6.

a)  f(g(1))

First, looking at the table, we can see that:

g(1) = 5

Then:

f(g(1)) = f(5)

Again, looking at the table we can see that f(5) = 6

Then we have:

f(g(1)) = 6

b) g(f(1))

Same approach as before:

f(1) = 6

then g(f(1)) = g(6)

And looking at the table, g(6) = 3

Then:  g(f(1)) = 3

c)  f(f(1))

f(1) = 6

f(f(1)) = f(6) = 4

f(f(1))  = 4

d)  g(g(1))

g(1) = 5

then:

g(g(1)) = g(5) = 4

g(g(1)) = 4

e) (gof)(3)

This is equal to:

(gof)(3) = g(f(3))

we know that f(3) = 4

then:

g(f(3)) = g(4) = 1

(gof)(3) = 1

f) (fog)(6) = f(g(6))

We can see that:

g(6) = 3

then:

f(g(6)) = f(3) = 4

Concluding:

(fog)(6) = 4

If you want to learn more, you can read:

https://brainly.com/question/8308119

Answer:

Step-by-step explanation:

y = x 2 + 91

Explanation:

Let the number be  x

, then  Square of the number is  x ^2

91 more than the square of a number" will be  x^ 2  +  91

So, we can write it as an algebraic expression with two variables as :

y = x ^2  +  91

Answer:

-4 is the answer

Step-by-step explanation:

Answer: 7/14 cant be written as a mixed number it is already a proper fraction. sorry I could help

Step-by-step explanation:

Step-by-step explanation:

2x-18 ≥ 0

2x ≥ 18

x ≥ 9

and

3x -27 ≠ 0

3x ≠ 27

x ≠ 9

so, the answer is <9 ; +oo >

Answer:

99.4 feet.

Step-by-step explanation:

You'd add 52.7 and 46.7, including 52.7 because she was already 52.7 feet under before she went even deeper.

Answer:

8.1

Step-by-step explanation:

use phythagoras theorem

since you have a hypotenuse and one known side you must equate the unknown side with the known sides and square two known side ,9^2-4^2= 62 then you must get the unknown side by introducing a square root and rounding off to the nearest decimal