7th grade math please help

f(x) is a function that takes some number x and outputs another one.

To get the output value, replace every instance of x in f(x) with the given number.

1. If f(x) = x ² - 4x, then

f (-3) = (-3)² - 4(-3) = 9 + 12 = 21

2. f(x) = x ² - x, so

f (-10) = (-10)² - (-10) = 100 + 10 = 110

3. f(x) = 3x + 1, so

f (-3) = 3(-3) + 1 = -9 + 1 = -8

4. f(x) = 4x - 2, so

f (8) = 4(8) - 2 = 32 - 2 = 30

5. f(x) = x ² + 2, so

f (0) = 0² + 2 = 0 + 2 = 2

Answer:

2

Step-by-step explanation:

im sure its 2 i hope this helps

Answer:n

= − 5 , 5

Step-by-step explanation:

Answer:

25=10+w

Because the value of w that makes the equation true is

w=25_10

w=15

Answer:

Step-by-step explanation:

Answer:

the answer is D because anything with an exponent of 0 is equal to 1

Step-by-step explanation:

I hope this helps :))

Answer:

.4763

Step-by-step explanation:

A percent can be made into a decimal by moving the decimal two places to the left.

It is the third one because if (gof) is gjudjgui8dfghdgdihhhdghgd

Answer:

The answer is D on edg 2020

Step-by-step explanation:

brainliest plz

Answer:

Its D

Step-by-step explanation:

∠2 ≅ ∠4

Answer: we have a vertical shift of 7 units down, and a horizontal shift of 5*pi/16 units to the right.

Step-by-step explanation:

First, let's define the transformations:

Vertical shift.

If we have a function f(x), a vertical shift of N units is written as:

g(x) = f(x) + N

This will move the graph of f(x) up or down a distance of N units.

if N is positive, then the shift is upwards

if N is negative, then the shift is downwards.

Horizontal shift.

If we have a function f(x), a horizontal shift of N units is written as:

g(x) = f(x + N)

This will move the graph of f(x) to the right or left a distance of N units.

if N is positive, then the shift is to the left

if N is negative, then the shift is to the right.

Here we have:

f(x) = 6*sin(x - pi/8) + 8

and the transformed function:

g(x) = 6*sin(x - (7/16)*pi) + 1

We can assume that the transformations are a vertical shift of A units, and an horizontal shift of B units, then we can write:

g(x) = f(x + B) + A

g(x) = 6*sin(x + B - pi/8) + (8 + A) = 6*sin(x - (7/16)*pi) + 1

Then we must have that:

(x + B - pi/8) = x -  (7/16)*pi

B - pi/8 = -(7/16)*pi

B = -(7/16)*pi + pi/8 =  -(7/16)*pi +2*pi/16 = (-7 + 2)*pi/16 = -5*pi/16

And we also must have that:

8 + A  = 1

A = 1 - 8 = -7

Then the transformation is:

g(x) = f(x - 5*pi/16) - 7

This means that we have a vertical shift of 7 units down, and a horizontal shift of 5*pi/16 units to the right.

Answer:

A 7.85 cm2 should be right

Answer:

32%

Step-by-step explanation:

Area of rectangle ABCD = 20 * 30 = 600 Sq cm

After increasing the length and width of the rectangle by 20% and 10% respectively.

New length = 30 + 20% of 30 = 30 + 6 = 36 cm

New width = 20 + 10% of 20 = 20 + 2 = 22 cm

Area of new rectangle = 36*22 = 792 Sq cm

Increase in area = 792 - 600 = 192 Sq cm

Percentage increase in area

= (192/600) *100

= 32%

Answer:

nnnnnnnfjnjzfv

Step-by-step explanation:

Answer:↓↓↓

Step-by-step explanation:

We are given that side AB is congruent to BD. We are also given that side AC is congruent to CD.

We know that side BC and side CB are congruent because of the Reflexive property.

Therefore, ΔABC and ΔDBC are congruent because of SSS Postulate.

Hope this helped!

Answer:10.50

Step-by-step explanation: 12-1.50=10.50

Answer: 12

Step-by-step explanation:

4t5t

Skylar went to the store to buy some almonds. The price per pound of the almonds is $7.75 per pound and she has a coupon for $3.50 off the final amount. With the coupon, how much would Skylar have to pay to buy 3 pounds of almonds? Also, write an expression for the cost to buy pp pounds of almonds, assuming at least one pound is purchased.

Skylar went to the store to buy some almonds. The price per pound of the almonds is $7.75 per pound and she has a coupon for $3.50 off the final amount. With the coupon, how much would Skylar have to pay to buy 3 pounds of almonds? Also, write an expression for the cost to buy pp pounds of almonds, assuming at least one pound is purchased.

Skylar went to the store to buy some almonds. The price per pound of the almonds is $7.75 per pound and she has a coupon for $3.50 off the final amount. With the coupon, how much would Skylar have to pay to buy 3 pounds of almonds? Also, write an expression for the cost to buy pp pounds of almonds, assuming at least one pound is purchased.

Answer:

t = 60

Step-by-step explanation:

Exponents by the power of another exponent multiply.

-12 · -5 = 60

So in this instance, the value of t would be 60.

Answer:

10 is 10 times as much as 1 because if you were to multiply 1 x 10, you would get 10.

Answer:

I think if yo seperate 4 from x then seperate 3 from x add those together and you get 18.

Step-by-step explanation:

It sounds right.

11 dimes and 4 buckles. You're welcome :)

Answer:

its b......................

The airplane must travel [tex]\sqrt{315}[/tex] km to be directly above the airport.

Pythagoras theorem states that for a right angled triangle, the square of the hypotenuse is the sum of the squares of base and altitude.

We have to apply the Pythagoras theorem to solve the problem.

By Pythagoras theorem,

Base² + Altitude² = Hypotenuse²

Given,

Altitude = 3 km

Hypotenuse is the slant distance from the airport = 18 km

Let x be the distance plane must travel to be directly above the airport.

x² + 3² = 18²

x² = 315

x = [tex]\sqrt{315}[/tex]

Hence the distance plane must travel is [tex]\sqrt{315}[/tex] km.

To learn mote about Pythagoras Theorem, click :

https://brainly.com/question/21926466

#SPJ2

Answer:

$26.25

Step-by-step explanation:

we can convert 25% directly to a decimal:

25% = 0.25

Then we find

25% of 35 = 0.25 x 35 = 8.75

35 - 8.75 = 26.25

So the jeans on sale cost $26.25

the sale price of the jeans will be $26.25

the correct answer is 16

Answer:

12

Step-by-step explanation:

120 divided by 100   =    12

12 multiplied by 10% =12

Answer:

? = 114

Step-by-step explanation:

Angle Formed by Two Chords  =  1/2 ( sum of Intercepted Arcs)

? = 1/2 ( 53+ 175)

? = 1/2 ( 228)

? = 114

9514 1404 393

Answer:

  B

Step-by-step explanation:

The given equation is in slope-intercept form:

  y = mx + b

where the slope is m = -3 and the y-intercept is b = +2.

So, the graph will have a slope of ...

  "rise"/"run" = -3 = -3/1

and will cross the y-axis at y=2.

Graphs A and B cross the y-axis in the right place, but only Graph B has a negative "rise" a x increases.

Step-by-step explanation:

subtract b to get P-b=2a. divide each side by 2 to get (P-b)/2=a

Answer:

It leaks half a gallon each hour.

Step-by-step explanation:

Answer:

Call the plumber

Step-by-step explanation:

If the school people refuse, make a petition. Ask around if they want a new pipe or fix it and collect their signatures. If the school still refuses, you can report them to the cops. If this was a question, it leaks 1/2 gallon per hour.

Step-by-step explanation:

You can see hier - Percentage Change Calculator