Someone please help me out ?

Hello!

Answer:

[tex]\boxed{X>-5}\checkmark[/tex]

The answer should have negative sign.

Step-by-step explanation:

Distributive property: a(b+c)=ab+ac

First, expand.

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

-4x-12<-2-2x

Then add by 12 both sides of an equation.

-4x-12+12<-2-2x+12

Simplify.

-4x<-2x+10

You add by 2x both sides of an equation.

-4x+2x<-2x+10+2x

Simplify.

-2x<10

Multiply by -1 both sides of an equation with reverse inequality.

(-2x)(-1)>10(-1)

Simplify.

2x>-10

Then you divide by 2 both sides of an equation.

2x/2>-10/2

Finally, simplify and solve to find this answer.

-10/2=-5

[tex]\boxed{x>-5}[/tex], which is our correct answer.

Hope this helps you!

Have a nice day! :)

Thank you!

-Charlie

If a function is even, it gives the same result for positive and negative inputs such as 8 and -8.

From the choices, the even functions are D and A.

D because the absolute value thing makes any input positive, and A because any number raised to an even power gives a positive result.

A function assigns the value of each element of one set to the other specific element of another set. The correct options are A and D.

A function assigns the value of each element of one set to the other specific element of another set.

A function is an even function if f of x is equal to f of −x for all the values of x.

A.)

f(x) = x⁴ - x²

f(-x) = (-x)⁴ - (-x)²

      = x⁴ - x²

Since f(x) and f(-x) are equal, therefore, the given function is a function.

B.)

f(x) = x² - 3x + 2

f(-x) = (-x)² - 3(-x) + 2

      = x² + 3x + 2

Since f(x) and f(-x) are not equal, therefore, the given function is a function.

C.)

f(-x) = √[(-x)- 2]

      = √(-x- 2)

Since f(x) and f(-x) are not equal, therefore, the given function is a function.

D.)

f(x) = |x| = x

f(-x) = |-x| = x

Since f(x) and f(-x) are equal, therefore, the given function is a function.

Hence, the correct options are A and D.

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Answer:

There are 52 such numbers that have even divisors.

Step-by-step explanation:

All the  numbers between 2 and 59 have an EVEN number of positive divisors.

Except the Perfect Squares..

or 4, 9, 16, 25, 36 and 49, which have 3 divisors each.

So:

59 - 2 + 1 =58

Now subtract 58 from 6 (perfect squares)

58- 6=52

Therefore,it means that there are 52 such numbers that have EVEN divisors....

Answer:

52

Step-by-step explanation:

Answer:

true

Step-by-step explanation:

1/10=0.1

0.1*2=0.2

By property of fraction, 0.2 is 1/10 of 2 is true.

By the property of fraction we know that 1/x times of a is a/x where a and x are two non-zero real numbers.

Given statement is 1/10 of 2

Thus we have, 1/10*2 = 2/10

And, 2/10 = 0.2 .

Therefore, by property of fraction, 0.2 is 1/10 of 2 is true.

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Answer:

(3)(-16)(-7)(-14) = (-48)(-7)(-14) = (+336)(-14) = - 4704;

Step-by-step explanation:

Answer:

-10x^2 + 40x

Step-by-step explanation:

f(x) = 2x - 8

g(x) = -5x

f(x)g(x)= (2x-8) (-5x)

            = -10x^2 + 40x

Answer:

y - 12 = - 5(x + 2)

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

Given f(x) = - 5x + 2 ← in slope- intercept form with slope m = - 5

using m = - 5 and (a, b) = (- 2, 12), then

y - 12 = - 5(x - (- 2)), that is

y - 12 = - 5(x + 2) ← on point- slope form

Answer:

a                        y – 12 = –5(x + 2)

Step-by-step explanation:

Answer:

7

Step-by-step explanation:

-|-7|=

-1 (|-7) =

|-7| = absolute value of |-7| is 7 because an absolute number is always positive.

the minus symbol should be -1.

so the sum is -1(7) = -7

the opposite of -7 is 7

Answer:

Step-by-step explanation:

the opposite of -|-7| is : - (-|-7|) = 1+7l

The steepness of a line is slope.  This is how fast y changes with respect to x.  It is the rise over the run.

Hope this helps!!

Answer:

i believe its positive

Step-by-step explanation:

Answer:

false

Step-by-step explanation:

Answer:

Scalene

Step-by-step explanation:

Note the definition of each triangle:

Equilateral: For a triangle to be an Equilateral, all sides must have the same measurements.

Isosceles: For a triangle to be an Isosceles, the two leg sides must be congruent. The base can vary, but cannot equal the leg sides.

Scalene: For a triangle to be an Scalene, none of the sides can be congruent.

~

Answer:

scalene

Step-by-step explanation:

an scalene triangle has sides of all different lengths

Answer:  see graph

Step-by-step explanation:

Set each equation equal to y, then graph each equation.

y = -x² + x + 6      (parabola)

y = 2x + 8            (line)

Notice that the system has NO SOLUTION because the parabola and the line never intersect.

The given equation represents the inconsistent system (It has no solution).

The graphs of a system that does not have any point of intersection are said to be inconsistent system. Which means the system has no solution.

The given system of equations as

[tex]y=-x^2+x+6[/tex] and [tex]y=2x+8[/tex]

So, plotting these equations in the graph,

We get a curve and a line that do not have any intersections.

So, the given system has no solution.

Therefore, the given system is an inconsistent system.

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A rectangle is the shape with parallel opposite sides, combined with all the 90 degree angles. As the type of the parallelogram, it has the opposite parallel sides. In the rectangle, 1 set of parallel sides is longer than the other, making it look like an elongated square

The rectangle field is 400 meters long and 300 meters wide. What is the area in square kilometers?

1km=1000m

Secondly the area of the rectangle is defined as the product of the width or the height:

A= w∗h

We could now approach the problem in 2 ways, we convert the sides of the rectangle to kilometers 1st and we convert the area from square meters to the square kilometers.

Let w = width, h = height and A = area

w=300m=300/1000m=0.3km

h=400m=400/1000m=0.4km

A=0.3∗0.4km2=0.12km2

Let's first calculate the area in square meters:

Am=300∗400=120000m2

We know from above that 1km=1000m

That gives 1km2=1000∗1000m2=1000000m2

So Ak=Am/1000000=0.12km2

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the area of the rectangular field is 0.12 square kilometers.

To calculate the area of a rectangular field in square kilometers, you need to multiply the length and width of the field and then convert the result from square meters to square kilometers. Given that the rectangular field is 400 meters long and 300 meters wide, the area in square meters is calculated as follows:

Area = length × width = 400 m × 300 m = 120,000 m2

Since 1 square kilometer (km2) is equal to 1,000,000 square meters (m2), you convert square meters to square kilometers by dividing by 1,000,000:

Area in square kilometers = Area in square meters / 1,000,000 = 120,000 m2 / 1,000,000 = 0.12 km2

Therefore, the area of the rectangular field is 0.12 square kilometers.

Check the picture below.

clearly the angle at vertex C isn't the right angle, so let's check if AB ⟂ BC.

[tex]\bf A(\stackrel{x_1}{-4}~,~\stackrel{y_1}{3})\qquad B(\stackrel{x_2}{0}~,~\stackrel{y_2}{-1}) \\\\\\ slope = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{-1-3}{0-(-4)}\implies \cfrac{-4}{0+4}\implies \cfrac{-4}{4}\implies -1 \\\\[-0.35em] ~\dotfill[/tex]

[tex]\bf B(\stackrel{x_1}{0}~,~\stackrel{y_1}{-1})\qquad C(\stackrel{x_2}{2}~,~\stackrel{y_2}{1}) \\\\\\ slope = m\implies \cfrac{\stackrel{rise}{ y_2- y_1}}{\stackrel{run}{ x_2- x_1}}\implies \cfrac{1-(-1)}{2-0}\implies \cfrac{1+1}{2}\implies \cfrac{2}{2}\implies 1 \\\\[-0.35em] ~\dotfill[/tex]

[tex]\bf \stackrel{\textit{perpendicular lines have \underline{negative reciprocal} slopes}} {\stackrel{slope}{-1\implies \cfrac{-1}{1}}\qquad \qquad \qquad \stackrel{reciprocal}{\cfrac{1}{-1}}\qquad \stackrel{negative~reciprocal}{+\cfrac{1}{1}\implies 1}} \\\\[-0.35em] ~\dotfill\\\\ ~\hfill \stackrel{\textit{so is a right triangle}}{AB\perp BC}~\hfill[/tex]

Answer:

[tex]\boxed{6760}[/tex]

Step-by-step explanation:

The formula for the first n terms of an arithmetic sequence is

Sₙ = n(a₁+ aₙ)/2

1. Find the number of terms

n = (124 - 45) + 1 = 79 + 1 = 80

2. Find the sum

 a₁ =   45

a₈₀ = 124

[tex]S_{80} = 80 \left(\dfrac{45 + 124 }{2}\right) = 80 \times 84.5= \boxed{\mathbf{6760}}[/tex]

Answer:

7

Step-by-step explanation:

Average value of a function F(t) on interval [a,b]

is [tex] \frac{1}{b-a} \int_a^b F(x)dx[/tex]

So let's plug it in!

a=0

b=9

F(x)=(x-4)^2

To integrate (x-4)^2 just use power rule for integration.

So this what we get

[tex] \frac{1}{9-0} \frac{(x-4)^3}{3}|_0^9 [/tex]

[tex] \frac{1}{9-0} [\frac{(9-4)^3}{3}-\frac{(0-4)^3}{3}] [/tex]

[tex] \frac{1}{9} [\frac{5^3}{3}-\frac{(-4)^3}{3}] [/tex]

[tex] \frac{1}{9} \cdot \frac{125+64}{3} [/tex]

[tex] \frac{1}{9} \cdot \frac{189}{3} [/tex]

7

Answer:

y=4x+27

Step-by-step explanation:

y+5=4(x+8)= (5-)y+5=4x+32(-5)

y=4x+27

Answer:

A

Step-by-step explanation:

You only have to pay the $50 one time and then you add the $15 and multiply it by however many months you choose to do.

Answer: A

Step-by-step explanation: Hope this helps

Answer:

x=0, y=4

x=2, y=5

x=4, y=6

x=6, y=7

x=8, y=8

x=10, y=9

For every x value goes up one, the y value goes up 2.

Step-by-step explanation:

Please mark brainliest and have a great day!

Answer:

x=0, y=4

x=2, y=5

x=4, y=6

Step-by-step explanation:

Answer:

12 + r or r + 12

Step-by-step explanation:

Either way can be written as the expression 12 is more than r or x

Answer:

f(r) = r + 12

Step-by-step explanation:

An expression is an equation that usually involves x and y. When we are dealing with a unknown number we use a variable. some common variable is x and y, in this instance we will use r. Therefore we have to have r in our expression. however, we need a output therefore we use function of r. (f(r))

p.s. F(r) usually represents y.

futhermore, if you see more than you know you will use addition.

hope this helps!

Answer:

Here's what I get.

Step-by-step explanation:

The formula for rotation of a point (x,y) by an angle θ about the origin is  

x' = xcosθ  -  ysinθ

y' = ycosθ + xsinθ

If θ = 270°, sinθ = -1 and cosθ = 0, and the formula becomes

x' =    y

y' =  -x

A: (-3,4)  ⟶ (4,3)

B: (-1,2)   ⟶ (2,1)

C: (-2,0) ⟶ (0,2)  

The vertices of A'B'C' are (4,3), (2, 1), and (0, 2).

The Figure below shows the triangle before and after the rotation.

Answer:

the answer is the second one

Answer:

The correct answer is "Sandwiches and salads are almost equally preferred."  

Step-by-step explanation:

From the survey, we get

122 students prefers Sandwich

15 students prefers Hot Dog

123  students prefers Salad

We are going to analyse every option

A sandwich is the most preferred lunch.  FALSE

Most preferred lunch is Salad (123) ,  sandwich is 122

Sandwiches and salads are almost equally preferred.  TRUE

A hot dog is two times more popular than sandwich. FALSE

No,  hot dog is 15 ,  and sandwich is 122,  sandwich is more popular than hot dog

A salad is almost two times more popular than a hot dog. FALSE

No,  hot dog is just 15 , and salad 123 more than 8 times hot dog

Answer:

8

Step-by-step explanation:

Varies directly think y=kx

Varies indirectly think y=k/x

We have first option so y=kx

x=6 and y=15 means we have 15=k(6)

So k=15/6 or reducing gives=5/2

So we just found our constant of proportionality, this number never changes.  It stays the same no matter what x or y they give you...

So the equation is y=5/2 *x

Now what is x if y=20

Plug in 20=5/2 *x

So x=20*2/5=40/5=8

Answer:

Option A: f(x) = 4 * 2^x

Step-by-step explanation:

4 because it is the y intercept.

2 because if you see point (1,8), yousee the 8 = 4 * a^1 where a = 2

If you need more explanation, please comment below.

Thank you!!

Answer:

A. [tex]f(x)=4\cdot (2)^x[/tex]

Step-by-step explanation:

We have been given graph of a function. We are asked to write the function formula from given graph.

We can see that our given function is an exponential function, so it will be in form [tex]y=a\cdot b^x[/tex], where,

a = Initial value or y-intercept,

b = Growth rate.

We can see that y-intercept is 4.

Now, we will solve for b using the point (1,8) as:

[tex]8=4\cdot b^1[/tex]

[tex]8=4\cdot b[/tex]

[tex]\frac{8}{4}=\frac{4\cdot b}{4}[/tex]

[tex]2=b[/tex]

Therefore, our required function would be [tex]f(x)=4\cdot (2)^x[/tex] and option A is the correct choice.

Answer:

your answer is there are 6 possible outcomes:

1, 2, 3, 4, 5 or 6

Items are 1, 3, 5 and 4 are equal to a total of 4 out of 6 results.

The answer is 4/6 or 2/3

Hope this helps :) -Mark Brainiest Please :)

Step-by-step answer:

Let's attack the left side:

log_8 12 = log (base 8) 12 = log(12)/log(8) = 1.1949875 (approx.)

Next solve

log_8 12 = x-2

log(12)/log(8) = x-2

x = 2 + log(12)/log(8)

= 3.195 (to one thousandth)

For this case we have the following expression:

[tex]log_ {8} (12) = x-2[/tex]

We rewrite how:

[tex]x-2 = log_ {8} (12)[/tex]

We add 2 to both sides of the equation:

[tex]x = log_ {8} (12) +2[/tex]

We rewrite [tex]log_ {8} (12)[/tex] as[tex]log_ {8} (2 ^ 2 * 3):[/tex]

[tex]x = log_ {8} (2 ^ 2 * 3) +2[/tex]

We apply logarithm properties:

[tex]x = log_ {8} (2 ^ 2) + log_ {8} (3) +2[/tex]

We apply logarithm properties:

[tex]x = 2log_ {8} (2) + log_ {8} (3) +2[/tex]

The logarithmic base 8 of 2 is [tex]\frac {1} {3}:[/tex]

[tex]x = 2 (\frac {1} {3}) + log_ {8} (3) +2\\x = \frac {2} {3} + log_ {8} (3) +2[/tex]

We simplify:

[tex]x = \frac {2} {3} + 2 + log_ {8} (3)\\x = \frac {2 + 6} {3} + log_ {8} (3)\\x = \frac {8} {3} + log_ {8} (3)[/tex]

Decimal form:

3,195

Answer:

[tex]x = \frac {8} {3} + log_ {8} (3) = 3,195[/tex]

Answer:

Step-by-step explanation:

To create a system of inequalities, write an inequality to model each condition that must be satisfied in the given situation.

It is given that x represents the area of the base of the barrel in square feet and y represents the volume of the pump in cubic feet.

Write an inequality to represent the amount of water that the barrel needs to hold after the pump is inserted. To find the volume of the barrel, multiply the area of the base by the height of the barrel. Then subtract the volume that will be taken up by the pump from that amount.

x(x-4) - y ≤ 90

To find the cost of the supplies for the barrel, find the surface area by multiplying the perimeter of the base by the height of the barrel and then adding the area of the base. Since there is no top, the area of the base only needs to be added once. Then, multiply the cost per square foot by the surface area.

To find the cost of the pump, multiply the cost per square foot of the pump by its volume.

Write an inequality representing the total cost. The cost must be less than or equal to $1,100.

8(x(x-4)+x) + 50y ≤ 1,100

Combining both of the inequalities gives the following system of inequalities.

x(x-4) - y ≤ 90

8(x(x-4)+x) + 50y ≤ 1,100

Answer:

The answer is

x(x-4) - y GREATER THAN OR EQUAL TO 90

8(x(x-4) + x) +50y LESS THAN OR EQUAL TO 1,100

Step-by-step explanation:

Answer:

f(-2) = 1/9

Step-by-step explanation:

Plug in -2 to x in the equation:

f(x) = 3^x

f(-2) = 3^(-2)

Solve. Note that if there is a negative in the power, you must flip the "fraction" and set it over 1. The answer itself does not become negative:

f(-2) = 1/(3^2)

f(-2) = 1/(9)

f(-2) = 1/9 is your answer.

~

[tex]\frac{1}{9}[/tex]

Answer:

D. 105.5 square feet

Step-by-step explanation:

Given:

The  rug has a radius of 3 feet.

The floor dimensions are 18 feet by 20 feet.

Now we have to find the area of the rug using area of the circle formula and also we need to find the area of the floor which is in rectangle shape.

Area of a circle = [tex]\pi r^2[/tex]

r = 3 feet and the value of [tex]\pi = 3.14[/tex]

Now plug in the given values in the above formula, we get

Area of a rug = 3.14*3*3

Area of a each rug is  28.27 square feet.

Now let's find the area of the floor.

Area of the floor = length * width

Here length = 18 feet and width = 20

The area of the floor = 18*20

= 360 square feet

Now we have to find how many rugs needed to cover the floor without overlap.

Here the radius of the rug = 3 feet

The diameter of the rug = 2*radius = 2*3 = 6 feet

So one rug covers 6 feet by length and width.

Therefore, 18/6 = 3

The width is 20 feet

20/6 = 3, we have to take the whole number part only.

So Emily needs only 3*3 = 9 rugs.

The area of the 9 rugs = 9*28.27  = 254.43

To find the bare floor will be visible around the rugs, we need to subtract the area of the 9 rugs from the floor area

Bare floor = 360 - 254.43

Bare floor = 105.5 square feet.