let f(x)=2x^2-3x+8.what is the value of f(-4)?

Answers

Answer 1
 f(x)=2x²- 3x + 8

f(-4) = 2(-4)² - 3(-4) + 8 = 52

Answer: 52

Related Questions

Help me! :)
The edges of a polyhedron are the line segments bordering each face.

True or False?

Answers

False, the edge of a polyhedron are the lines bordering each face.

The answer is True :3

Find the value of x
Please answer fast
Thx

Answers

The answer is sixty one
I think X=6°. Since a right angel is 90°, I just subtracted 29° from 90° and that got me to 61°. Hope this helps.  

Let A = {a, b, d, f, g} and B be a sets in the universe U = {letters of the alphabet}. If A ∩ B = {b, d}, which could be a set of B?

(steps to solve problem too please?)

Answers

Final answer:

Set B must contain the elements {b, d}, which are present in its intersection with set A. Besides those, set B can include any other letters from the alphabet.

Explanation:

The question involves finding a possible set B given the information that set A is {a, b, d, f, g} and A ∩ B = {b, d}, where ∩ represents the intersection of two sets. Intersection means the elements that are common to both sets.

Therefore, to solve this, we can conclude that set B must contain at least the elements {b, d}, as these are present in the intersection with set A.

However, set B can also contain other letters of the alphabet since the universe U is the set of all letters in the alphabet.

Hence, the possible set B could be any set containing {b, d} along with any combination of other letters from the alphabet. For example, set B could be {b, d, e, m, n} or {b, d, x, y, z}, or simply {b, d} itself.

Final answer:

Set B must contain the elements {b, d} from the intersection with set A and can include any other letters of the alphabet except for a, f, and g.

Explanation:

The question asks us to determine set B given that the intersection of sets A and B is {b, d}. We know that A = {a, b, d, f, g} and A ∩ B = {b, d}. The intersection of two sets includes only the elements that are present in both sets. Since b and d are the only common elements, they must be in set B. However, set B can also contain any elements from the universal set U that are not in set A. Hence, set B must include {b, d} and can include any of the other letters in the alphabet except for a, f, and g.

Find the measure of z

A. 108
B. 120
C. 135
D. 144

Answers

Sum of all interior angles = ( n - 2) x 180

Since Octagon = 8 sides,

Sum of all interior angles = ( 8 - 2) x 180 = 1080

z = 1080 ÷ 8 = 135°

Answer: z = 135°

Name the complementary to m

Answers

Answer:
The complement of m∠WXV is m∠UXV

Explanation:

Complementary angles are two (or more) angles with a sum of 90 degrees.

Because line WT is dissected perpendicularly by line UX, two 90° angles are formed in ∠TXU and ∠WXU. We know that they are both 90° because of the box on ∠TXU. ∠TXU and ∠WXU are supplementary angles -- two angles that occupy the same line but are dissected by a perpendicular line forming two angles with a sum of 180 degrees.

If ∠TXU + ∠WXU = 180, and ∠TXU = 90, then ∠WXU must also equal 90:
90 + ∠WXU = 180
90 - 90 + ∠WXU = 180 - 90
0 + ∠WXU = 90
∠WXU = 90°

As we see in the diagram, ∠WXU is dissected by line SV. Because of this, it is broken into the two angles of ∠WXV and ∠UXV. We already established that ∠WXU is 90°. Therefore the sum of these two angles formed must equal 90°, which, in turn, means they are complementary angles. They complement one another.

Therefore, the complement of ∠WXV is ∠UXV

What is the measure of ∠PQR ?

Enter your answer in the box. °

Answers

the 3 inside angles of a triangle need to = 180 degrees
 you are given 70 and 80 which = 150 degrees  ( 70 +80 = 150)

so the missing angle (PQR) = 180 - 150 = 30 degrees

i believe its 30 rn im taking that question aswell if it isnt 30 ill tell you what it is

7y+25=-24 what is the answer

Answers

y=−7 should be the answer
7y= -24-25
7y= -49
y=-7

Which expression is equivalent to the expression shown please help!!!!!!!!!!!

Answers

When dividing exponents, you actually subtract the exponents

= 7^14 ÷ 7^2
= 7^(14-2)
= 7^12


ANSWER: 7^12 (top right answer)

Hope this helps! :)

Please Help Me with this problem.

Answers

-7c-63 im not exactly sure but its close

watermelon seed is 4mm long. How far would a line of 120 watermelon seeds stretch? Write your answer in meters.

Answers

[tex]120[/tex] seeds would be [tex]120 \cdot 4 = 480[/tex] milimeters. This is also [tex]\boxed{0.48}[/tex] meters (since 1000mm is 1 m).
Final answer:

To find the total length of 120 watermelon seeds, each 4mm long, we just need to multiply the length of one seed by the total number of seeds. Then, to convert the total length from millimeters to meters, we divide by 1000. So, a line of 120 watermelon seeds would be 0.48 meters long.

Explanation:

This problem involves simple multiplication to solve it. Since each watermelon seed is 4mm long, to find the length of 120 seeds lined up, we just need to multiply 120 by 4. So, 120 seeds * 4mm/seed = 480mm. To convert millimeters to meters, we divide by 1000 (as there are 1000mm in a meter). So, 480mm = 0.48 meters. Therefore, a line of 120 watermelon seeds would stretch 0.48 meters.

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Charlene has a budget of $65. Beau and Belle dresses are $76.48. What inequality can be used to calculate how much of a markdown Beau and Belle must take for Charlene to stay in her budget

Answers

76.48
- 65.00
----------
$11.48
The answer for how much of a markdown would be 15%
The inequality
[tex]76.48 \geqslant 65 + .15[/tex]
76.48 is greater than or equal to 65 + 15%

Final answer:

To find out how much Beau and Belle must markdown the dress for Charlene to stay within her budget of $65, we use the inequality 76.48 - m ≤ 65, which solves to m ≥ 11.48, meaning the dress needs a markdown of at least $11.48.

Explanation:

To determine the markdown Beau and Belle must offer for Charlene to afford the dress within her budget, we can set up an inequality. Let's denote the markdown as m. The original price of the dress is $76.48, and Charlene's budget is $65. Therefore, the dress's price after the markdown should be less than or equal to $65. The inequality that models this scenario is:

76.48 - m ≤ 65

This inequality states that the original price of the dress minus the markdown m should be less than or equal to Charlene's budget of $65. To find out how much of a markdown is needed, we will solve for m.

Subtracting $76.48 from both sides of the inequality:

-m ≤ 65 - 76.48

-m ≤ -11.48 (This indicates that the markdown must be at least $11.48)

To express m as a positive number, we multiply both sides of the inequality by -1, remembering to reverse the inequality symbol:

m ≥ 11.48

Therefore, Beau and Belle must markdown the dress by at least $11.48 for Charlene to stay within her budget constraint.

Lyla took a total of 16 quizzes over the course of 4 weeks. After attending 8 weeks of school this quarter, how many quizzes will Lyla have taken in total? Assume the relationship is directly proportional.

Answers

32 quizzes. If you make a proportion of quiz/weeks it would be 16/4 = x/8. Multiply by 2.
Final answer:

Lyla takes 4 quizzes per week. Over 8 weeks, she will have taken a total of 32 quizzes, if the relationship is directly proportional.

Explanation:

Lyla took 16 quizzes over the course of 4 weeks. This indicates that Lyla takes 4 quizzes per week (16 quizzes divided by 4 weeks). We can apply this rate to an 8-week period to find out how many quizzes she will have taken after 8 weeks of school. To do this, you multiply the number of quizzes she takes per week (4) by the number of weeks (8), which results in 32 quizzes. Hence, Lyla will have taken a total of 32 quizzes after 8 weeks. This calculation assumes that the relationship is directly proportional, meaning the number of quizzes she takes each week remains constant.

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corresponding sides of two squares are in the ratio 13to 19. what is the ratio of their perimeters

Answers

All the linear dimensions of similar figures have the same ratio. Perimeter is a linear dimension, so will have the same ratio as side lengths.

The ratio of their perimeters is 13 to 19.

a bell curve ____
A. Normal Distribution
B. Negatively Skewed
C. Positively Skewed

Answers

it should be A. Normal Distribution. 

A cube has a surface area of 864 square inches.

Find the volume of the cube.

Answer Choices

12 cubic inches


144 cubic inches


1,664 cubic inches


1,728 cubic inches

Answers

The answer is (D) or 1728 In³
the  answer will be 1,728

Please help me? Show your work please! I give brainiest! (Or whatever it’s called :) )

Answers

You need to find the hypotenuse of the right triangle.

4² + 9² = c²
16 + 81 = c²
97 = c²
9.85 = c

There are 5,280 ft in a mile.
Multiply 9.85 by 5,280.

9.85 × 5,280 = 52,008
Multiply 52,008 by 110.

52,008 × 110 = 5,720,880

The estimated cost for constructing the street would be $5,720,880.

The sum of 6 consecutive integers is 519. What is the third number in this sequence?

Answers

the third integer is 86, hope this helps :)
Let the third number be n. then the series of numbers is n-2, n-1, n, n+1, n+2, n+3. The sum of these numbers should be 519. Add them together and solve for n:
n-2+n-1+n+n+1+n+2+n+3=519
6n+3=519
6n=516
n=86

So the third number is 86.

THere are 36 peoplein a fitness studio. What fraction represents the number of people running?
3/8 of the people lifted weights, 1/3 of the people did cross training, the remaining people were running.

a. 7/24 b. 17/24 c. 5/12 d. 7/8

Answers

The fraction of people running is 7/24. Hence, the correct option is a.

We are asked to find the fraction of people running in a fitness studio, given that 3/8 are lifting weights and 1/3 are doing cross training.

Here's how to calculate it:

First, let's find the fraction of people lifting weights:
3/8 of 36 = 13.5 people (since 36 * 3/8 = 13.5).

Next, we find the fraction of people doing cross training:
1/3 of 36 = 12 people (since 36 * 1/3 = 12).

Now, we can find the total number of people not running by adding those lifting weights and cross training:
13.5 + 12 = 25.5 people.

To find the number of people running, we subtract the number not running from the total:
36 - 25.5 = 10.5 people running.

Finally, we convert this into a fraction of the total number of people in the fitness studio:
10.5 out of 36 is 10.5/36, which can be reduced to 7/24.

A combined total of $49,000 is invested in two bonds that pay 2% and 6.5%simple interest. The annual interest is $2,5100. How much is invested in each bond?

Answers

let x is the bond pay 2% and y is the pay 6.5%
x + y = 49,000 so x = 49,000 - y
0.02x + 0.065y = 2,510
substitute x = 49,000 - y into 0.02x + 0.065y = 2,510

0.02x + 0.065y = 2,510
0.02(49,000 - y) + 0.065y = 2,510
980 - 0.02y + 0.065y = 2,510
0.045y = 1,530
         y = 34,000
         x = 49,000 - y = 49,000 - 34,000 = 15,000

answer
invested $34,000 in the bond that pays 6.5% rate and $15,000 in bond that pays 2% rate

Final answer:

The amount invested in the 2% bond is $7,500, and the amount invested in the 6.5% bond is $41,500.

Explanation:

Let's assume that the amount invested in the 2% bond is x dollars. Then, the amount invested in the 6.5% bond is $49,000 - x dollars.

The interest earned from the 2% bond is 0.02x dollars, and the interest earned from the 6.5% bond is 0.065($49,000 - x) dollars.

According to the problem, the sum of these two interests is $2,510. So, we have the equation:

0.02x + 0.065($49,000 - x) = $2,510

Simplifying and solving this equation, we find that x = $7,500. Therefore, $7,500 is invested in the 2% bond, and $41,500 is invested in the 6.5% bond.

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Who cant help me with 1-6 ‍♀️♥️

Answers

1)80
2)55
3)D
4)F
5)-20
6)B
Hope that helps

Okay my question is : Rachael’s backyard swimming pool is being empty by a pump. The amount of water in the pool W in gallons at any time t in hours is given by the following equation :W=9000-150t deep how many gallons of water are being pumped out each hour??that is my question plzzz answer asap

Answers

Hello.

250 1 times 250 substract by 9000 gives 8750 them find loss of water by 9000 substracted by 8750.

Have  a nice day

it looks as though you made 72 of your goal so far for the month you only have 5 days left to reach 100% of your goal let me remind you that your target was 45 renewals how many renewals in the next 5 days

Answers

72% can also be written as 0.72, so take 0.72 x 45 = 32.4     

Subtract 32.4 from 45    45 - 32.4 = 12.6    You need 12.6 renewals in 5 days.

In the next 5 days, 13 renewals must be made.

Given that you made 72% of your goal so far for the month, and you only have 5 days left to reach 100% of your goal, and your target was 45 renewals, to determine how many renewals in the next 5 days you must perform, you must perform the following calculation:

100 = 45 72 = X 72 x 45/100 = X 32.4 = X 45 - 32.4 = 12.6

Therefore, in the next 5 days, 13 renewals must be made.

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A 6-foot tall person standing with her back to the sun casts an 8-foot long shadow. To the nearest degree, what angle does the sun make with the ground?

Answers

tgα = 6/8 = 0,75
α≈37 °

Answer:

Step-by-step explanation:

Alright, lets get started.

Please refer the diagram I have attached.

Let us suppose the sun has angle of elevation x

The triangle formed will be a right triangle, so

[tex]tan x= \frac{opposite}{adjacent}[/tex]

[tex]tanx = \frac{6}{8}[/tex]

taking tan inverse

[tex]x=tan^{-1}(\frac{6}{8} )[/tex]

[tex]x=36.87[/tex]

To the nearest degree, the angle will be 37 degrees.  :   Answer

Hope it will help :)

it is an algebra 2 question I do not know if that is allowed. please if anyone can help anyway.
[tex]x \div x - 4 = 2[/tex]

Answers

the arrows are saying to cross multiply

find the difference 7/x^2-7x - 5/x^2-49

Answers

Rewriting the expression we have:
 (7 / (x ^ 2-7x)) - (5 / (x ^ 2-49))
 Rewriting the denominator:
 (7 / (x * (x-7))) - (5 / ((x-7) (x + 7)))
 (1 / (x-7)) * ((7 / x) - (5 / (x + 7)))
 Rewriting we have:
 (1 / (x-7)) * (((7x + 49) + (-5x)) / (x * (x + 7)))
 (1 / (x-7)) * ((2x + 49) / (x * (x + 7)))
 ((2x + 49) / (x * (x + 7) * (x-7)))
 Answer:
 
The difference is:
 
((2x + 49) / (x * (x + 7) *(x-7)))

a zookeeper measured the length of 5 snakes at the zoo he recorded the results in a table. what is the main snake length?

____cm

Answers

I'm 90% sure the answer is twenty-six cm.

Evaluate the expression. If necessary, round to the nearest hundredth. ln 4.4

Answers

ln 4.4 is "the natural logarithm of 4.4"

While it's possible to approximate the value of this log (using a series representation for the ln function), the more usual approach at this course level is to look up or calculate the value.

On my TI-83 Plus calculator, I entered "ln 4.4" and obtained the result 1.48.  This is approximate.  


Gwen has recently purchased a cottage. She has arranged
to have well dug on the property. One in five wells that
were dug recently in the vicinity were dry, and 30% of the
others were contaminated. Find the probability of each of
the following:

a) Gwen’s well will not be dry.

(b) Gwen’s well will be uncontaminated, given that it is not dry.

(c) Gwen will have safe drinking water
from her well.
(d) Gwen will not have safe-drinking
water from her well.

Answers

The probabilities are:

a) 80%

b) 70%

c) 56%

d) 24%

How to find the probability?

We know that 1 on 5 weels are dry, so 20% are dry, 80% have water.

Out of these 80%, 30% are contaminated, so the percentage of contaminated wells is:

p = 100%*(0.8*0.3) = 24%

Then the ones that are safe to drink are the:

q = 80% - 24% = 56%

Then:

a) Gwen’s well will not be dry. --> 80%

(b) Gwen’s well will be uncontaminated, given that it is not dry.

30% of the non-dry wells are contaminated, so the other 70% aren't.

(c) Gwen will have safe drinking water from her well. 56%

(d) Gwen will not have safe-drinking water from her well. = 24%

n is prime given that it has 2 digits

Answers

a prime number which is 2 digits is 11.

Which expression is the correct one?

Answers

According to the logarithmic property of base change, the correpta answer is option one or the first.
 The logarithmic property of base change says that
 loga (b) = logc (b) / logc (a)
 Therefore the same property applies to this problem and the correct expression for this question is:
 logb (x) / logb (a)
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