Mathematics College

Given
f(x) = 2x^2 – 5x, evaluate f (-4).

Answers

Answer 1

Answer:

52

Step-by-step explanation:

f (-4) = 2(-4)² - 5(-4)

        = 32 + 20

        = 52

Related Questions

A small refrigerator is a cube with a side length of 19 inches.
Use the formula S = 6s2 to find the surface area of the cube.

Answers

Answer:

2166in^2

Step-by-step explanation:

S=6(19)^2=2166

A dress that is size x in France is equaivalent to size​ d(x) in the United​ States, where ​d(x)x32.
​(a). Find a function that will convert U.S. dress size to French dress size.
​(b) Use the inverse function to find the French size of a dress if it is U.S. size .

Answers

Answer:

[tex](a)\ d'(x) = x + 32[/tex] i.e. The inverse function

[tex](b)\ d'(10) = 42[/tex] i.e. The French size of a dress if it is U.S. size 10 is 42.

Step-by-step explanation:

Given

[tex]d(x) = x - 32[/tex]

Solving (a): The inverse function

[tex]d(x) = x - 32[/tex]

Replace d(x) with y

[tex]y = x - 32[/tex]

Swap y and x

[tex]x = y - 32[/tex]

Make y the subject

[tex]y = x + 32[/tex]

Replace y with d'(x)

[tex]d'(x) = x + 32[/tex]

Hence, the inverse function is: [tex]d'(x) = x + 32[/tex]

Solving (b): US size of 10

[tex]d'(x) = x + 32[/tex]

Substitute [tex]x =10[/tex]

[tex]d'(10) = 10 + 32[/tex]

[tex]d'(10) = 42[/tex]

1. The number of Hamilton circuits in K15 is
A) 15!
B) 105
C) 14!
D) 15
E) None of these

Answers

Hamilton circuits in K15 have 14

-9(5x+10) show work please

Answers

Answer:

-45x-90

Step-by-step explanation:

-9*5x=-45

-9*10=-90

Which point is closest to the x-axis?
(4, 8)
(2, 11)
(8, 7)
(3, 13)

Answers

Answer:

B

Step-by-step explanation:

The other guy was wrong

   (4, 8)

   (2, 11)

✔(8, 7)

   (3, 13)

What is the rule for dividing a fraction explain.

Answers

Answer:

When students see a number that ends in an even digit, they should know the number can be divided into two evenly. However, numbers that end in odd digits can be divided by two, they'll just have a remainder or decimal.

Step-by-step explanation:

HELPPP ITS DUE TODAY!!!


Given the function rule h(x)=6x-1, find the value of h(3)

Answers

Answer:

put x=3 in equation we get

18-1

17 is the answer

Triangle JKL is on the coordinate grid below what is the slope of the altitude from vertex K to segment JL

Answers

Answer:

5/6

Step-by-step explanation:

HELP WILL MARK BRAINLIEST IF GOTTEN RIGHT

Answers

Answer:

111*

Step-by-step explanation:

46*2=92

360-92-157=111

A dot plot displays data ______
using a small dot for each data piece.

A : Vertically

B: Graphically

C: Proportionally

Answers

A is the correct answer

Find the slope of the line that passes through the indicated points.

(4,-1) and (8,1)

(1,4) and (3,0)

Answers

#1
2/4 = 1/2

#2
-4/2 = -2

1/20 + x = 1/10 what is the value of x

Answers

Answer:

1/20

Step-by-step explanation:

1/20 +x = ⅒

multiply through by 20

1+20x=2

1-2=-20x

-1= -20x

1/20=x

Part A: The area of a square is (16x^2 − 8x + 1) square units. Determine the length of each side of the square by factoring the area expression completely. Show your work.

Part B: The area of a rectangle is (81x^2 − 4y2) square units. Determine the dimensions of the rectangle by factoring the area expression completely. Show your work.

Answers

Answer:

Step-by-step explanation:

hello :

here is an solution

Find the product for the following expressions:
(8c + 2)(5c-7)

Answers

Answer:40c^2-46c -14

Step-by-step explanation:

(8c+2)*(5c-7)

8c*(5c-7)+2(5c-7)

40c^2-56c+10c-14

40c^2-46c-14

Answer:

(8c + 2)(5c-7) = 40c²-46c-14

Explanation:

(8c + 2)(5c-7) = 40c²-56c+10c-14

(8c + 2)(5c-7) = 40c²-46c-14

the question is in the picture.

Answers

Answer:

Team 1

Step-by-step explanation:

I think it is team 1 because their whiskers go through the whole graph and team 2 only goes from 68 to 76

Answer:

team 1

Step-by-step explanation:

helppp!!! What is the value of y?
60°
v2
45
Enter your answer, as an exact value, in the box.

Answers

Answer:

y=2√3, or 3.46410161513

Step-by-step explanation:

The smaller triangle is a right isosceles triangle, so the other side is also √2. To figure out it’s hypotenuse, you can use the Pythagorean theorem.

√2²+√2²=c²

2+2=c²

4=c²

√4=c

c=2

Now that we know that value, we can look at the bigger triangle.  It is a 30-60-90 triangle, which has special properties.

Y would equal the two of the base times the square root of three.

y=2√3, or 3.46410161513

The value of the y is 2√3 if the value of hypotenuse in the triangle with 60-degree angles is 2

What is a right-angle triangle?

It is a triangle in which one of the angles is 90 degrees and the other two are sharp angles. The sides of a right-angled triangle are known as the hypotenuse, perpendicular, and base.

From the sin ratio in the triangle with angle 45 degree

Sin45 = √2/x

x = 2

From the triangle with angle 60 degree

y/2 = tan60

y = 2√3

Thus, the value of the y is 2√3 if the value of hypotenuse in the triangle with 60-degree angles is 2

Learn more about the right angle triangle here:

brainly.com/question/3770177

#SPJ2

Cole threw 50 darts. Here are his results Orange 29, Green 15, Blue 5, and Red 1 Calculate the experimental probability for each color. PLEASEEEE HURRYYY​

Answers

Answer:

Orange 29/50, or 58%

Green 3/10, or 30%

Blue 1/10, or 10%

Red 1/50, or 2%

QUICK BRAINLIEST

Which equation shows how to find the
angle measure of the part of the circle
without the arrow?

Answers

C is the answer to your question

Can someone help me pls

Answers

Sorry bro I’m in algebra 1 not calculus but good luck bro ✊

vertex form of x=y^2+6y+1

Answers

x=(y+3)²−8 is the answer

39, 87, 72, 88, 75, 87, 15, 53, 53
What is the median

Answers

The median is 72 because you would have to least your number from least to greatest and what number is you middle number that is your median

Answer:

72 or 75

Step-by-step explanation:

If we are going in order then the median would be 72.

If we are going by what you posted, then it would be 75.

You were asking about the mean, so I though I would just add it in here.

So basically, the mean is just where you add up all the numbers, and then divide them by how many numbers you have.

For your problem, this is 39+87+72+88+75+87+15+53+53. This equals 569.

Now, lets count how many numbers we added: 1...2...3...4...5...6...7...8...9.

Ok, so lets divide the 569 by 9. This should get you 63.222...

That is your mean.

Your friend has x blueberries. You have 19 blueberries. You and your friend have a total of 48 blueberries. Which equation can you use to find x?

Answers

Answer:

48-19=x

Step-by-step explanation:

if you subtract those you get 29

The first sequence rule is add 5 starting from 20. The second sequence rule is subtract 7 starting from 56. What is the first number that appears in both sequences?

25
28
42
35

Answers

Answer:

35

Step-by-step explanation:

The first number that appears in both sequences is 35.

What is mean by Subtraction?

Subtraction in mathematics means that is taking something away from a group or number of objects. When you subtract, what is left in the group becomes less.

Now, The first sequence starts with 20 and adds 5 each time, so the first few terms are:

20, 25, 30, 35, 40, 45, 50, 55, 60, ...

And, The second sequence starts with 56 and subtracts 7 each time, so the first few terms are:

56, 49, 42, 35, 28, 21, 14, 7, 0, ...

Hence, Looking at these lists, we can see that the first number that appears in both sequences is 35.

This is the fifth term in the first sequence as,

⇒ 20 + 5 + 5 + 5 + 5 = 35

And, the fourth term in the second sequence is,

⇒ 56 - 7 - 7 - 7 - 7 = 35

Hence, the first number that appears in both sequences is 35.

Learn more about the subtraction visit:

https://brainly.com/question/17301989

#SPJ2

Using the graph, determine the coordinates of the x-intercepts of the parabola.

Answers

The result is (0 ; -32). See the 3 pictures for details.

Many places in Louisiana have a 10% sales tax. Talal buys a coat for $45 and has a 10% coupon that he uses. After that, he pays
the 10% sales tax. Calculate how much Talal pays for his coat after discount and tax.

Answers

Answer: $44.55

Step-by-step explanation:

$45 times the 10% sales tax equals $49.50

$49.50 minus the 10% discount equals $44.55

Discount 75%, Sale Price $74.75, Original Price-?

Answers

Answer:

You will pay $18.69 for a item

Step-by-step explanation:

if you buy an item at $74.75 with 75% discount, you will pay 74.75 - 56.0625 = 18.69 dollars.

Answer:

$299

Step-by-step explanation:

The discount is 75%, so the sale price represents 25% of the original price.

25% : $74.75

(multiply both sides by 4 to get 100%)

100% : $299

a circular pizza that is 10 inches in diameter is cut into 8 equal slices. what is the area of one of the slices? round to the nearest tenth id needed

Answers

The area of one slice is roughly 14.13

The area of the whole pizza is 113.1
Divide that by 8

what does 7 x 3/4 equal?

Answers

Answer:

21/4

Step-by-step explanation:

Answer:

5.25

Step-by-step explanation:

21/4 that's it. ..........

Find missing side lengths

Answers

Answer:

[tex]y=30\sqrt{2}[/tex]

Step-by-step explanation:

[tex]In[/tex]Δ[tex]ABC[/tex]

[tex]tan45=AB/BC[/tex]

[tex]1=30/BC[/tex]            [tex][tan45=1][/tex]

[tex]-------\\BC=30 \\-------[/tex]     ⇒   [tex]OC=30\\[/tex]

[tex]and[/tex] [tex]In[/tex] Δ[tex]ABC[/tex]

[tex]Cos45=Bc/AC[/tex]  

[tex]1/\sqrt{2} =x/y[/tex]

[tex]y=\sqrt{2}*x[/tex]

[tex]y=30\sqrt{2}[/tex]

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

hope it helps....

have a great day!!

6
A painter sets a ladder
against a wall 9 ft above
the ground. If the ladder is
3 feet from the base of the
wall, how long is the ladder?
Round your answer
to the nearest tenth.

Answers

Answer: About 10 ft.

Use Pythagorean's Theorem!

c=[tex]\sqrt{9^2+3^2}[/tex]

9 * 9 = 81

3 * 3 = 9

81 + 9 = 90

[tex]\sqrt{90\\}[/tex] = 3[tex]\sqrt{10}[/tex] ≈ 10 ft.

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