For the function of F (x) -2x^2 + x + 1 find F (3)
Answers
Step-by-step explanation:
F(x) = -2x² + x + 1.
Therefore F(3) = -2(3)² + (3) + 1
= -18 + 3 + 1 = -14.
Related Questions
Students in a science class investigated how the speed of sound changes with the air temperature outside. The data are shown in the scatterplot.
Based on the scatterplot, what is the best prediction of the speed of sound when the air temperature is 45°C?
350 m/s
355 m/s
360 m/s
365 m/s
Answers
Answer:360 m/s
Step-by-step explanation:
The best prediction of the speed of sound when the air temperature is 45°C is 360 m/s option third is correct also the graph shows a positive correlation.
What is correlation?It is defined as the relation between two variables which is a quantitative type and gives an idea about the direction of these two variables.
As we can see in the graph:
When the air temperature is 10°C the speed of sound is around 337m/s
When the air temperature is 20°C the speed of sound is around 344m/s
When the air temperature is 30°C the speed of sound is around 348m/s
When the air temperature is 40°C the speed of sound is around 355m/s
From the above observation, the air temperature increases the speed of the sound increases.
So when the air temperature reaches 45°C the speed of the sound will be 360 m/s.
Thus, the best prediction of the speed of sound when the air temperature is 45°C is 360 m/s.
Learn more about the correlation here:
brainly.com/question/11705632
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A salesperson’s commission rate is 4%. What is the commission from the sale of $39,000 worth of furnaces? Suppose sales would double. What would be true about the commission?
Answers
Answer:
The earnings will double
Step-by-step explanation:
Step one:
given data
we are told that the sales person's earnings is 4% of the sales made.
given that the sales made is $37,000 worth of furnaces.
Step two:
we want to find 4% of $37,000
=4/100*37000
=0.04*37000
=1480
hence for $37,000 the earning will be $1480.
Now suppose sales is doubled that is 37000*2= 74000
we want to find 4% of $74,000
=4/100*74000
=0.04*74000
=2960.
the earnings is $2960.
So if sales doubles the earnings will double
hihihihi im backkkkkkk
please help :D
Answers
Answer:
1 2/4 is the greatest
On a recent survey, 60% of those surveyed indicated that they preferred taking a trip to the beach over a trip to the mountains. If 810 people preferred a trip to the mountains, how many people were surveyed?
Question 1 options:
486
870
1,350
2,025
Answers
Answer:
Its Option three, 1,350.
Step-by-step explanation:
60% of 1350 is 810.
B. Juan’s cell phone company charges $35 a month for phone service plus $0.50 for each text message. How many text messages does Juan send in a month if his bill was $52?
1. Define the variable: 2. Determine the constant:$35
3. What is the rate? 4. Write the equation and solve: 35+0.50t=52
C. Friendship’s soccer team purchased uniforms and equipment for a total cost of $912. The equipment cost $612, and the uniforms cost $25 each. How many uniforms did the school purchase?
1. Define the variable: 2. Determine the constant:
3. What is the rate: 4. Write the equation and solve:
D. Long’s Coffee Shop sells a refill mug for $8.95. Each refill costs $1.50. Last month, Jalissa spent $26.95 on a mug and refills. How many refills did she buy?
Write the equation and solve:
Answers
C. Because that is the answer my guy.
Please help I will give brainliest and 11 points!!
Answers
Answer:
[tex]-64y^{2}[/tex]
Step-by-step explanation:
You first multiply (-4)^3, then add the exponents of y, which is [tex]y^{2}[/tex].
Answer:
-4^3*y^2
Step-by-step explanation:
Because there are 3 “-4”s being multiplied it would be to the power of 3.
Because there are 2 ”y”s being multiplied it would be to the power of 2
Then you just need to multiply them together.
please solve and explain, thanks!! :))
Answers
Answer:
B
Step-by-step explanation:
Its B because you distribute each term inside the parenthesis by the number out side
4×2x= 8x
4×3= 12
Get rid of the parenthesis after distributing
which makes 8x+12
Answer:
B. 8x + 12
Step-by-step explanation:
First you'd start with the parentheses because of PEDMAS. But because you can't do anything in there, you go to multiplying 4 by each item inside the parentheses. 4x2x gives 8x. 4x3 gives 12. Leaving you with 8x+12. Hope that helps! :)
whats , 3(a+b)+2b / please help I will give you 10 points
Answers
3a+3b+2b=3a+5b
solve for a: a=-5b/3
solve for b: b=-3a/5
Answer:
3a+5b
Step-by-step explanation:
3(a+b+)2b
the first thing you'd do would be distribute 3 to a and b
3a+3b+2b
you then would combine like terms which are 3b and 2b
3a+5b
Find the sale price of the item. Round to two decimal places if necessary. Original price: $234.16 Markdown: 79% The sale price is $_____
PLS ANSWER ASAP !!! i will give the best answer brainliest :)
Answers
Answer:
84.22
Step-by-step explanation:
Answer:
The answer is $184.99
Step-by-step explanation:
the first thing you do is set up the problem like this 234.16 x 0.79 then when you multiply you get 184.9864 if you round to the nearest sent you get 184.99
Hope this helps :D
-9+4(f-1)=-13+4f. Find f
Answers
Answer:all real numbers are solutions
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
Step 2: Subtract 4f from both sides.
Step 3: Add 13 to both sides.
0=0
Answer:
all could be
f(0)=.12
f(.1)=-.4
f(.2)=1.3
f(.3)=2.6
f(.4)=3.7
Step-by-step explanation:
Simplify using the Laws of Exponents
plz :]
Answers
Answer:
243000x
Step-by-step explanation:
If you do 30 by the power of 5 you get 24300000 so that is our numerator 24300000/?. Next, you do 10 by the power of 2. so 24300000/100. Next, simplify and you get 243000x. Hope this helps, let me know if correct, and have a great day!!
Write the linear equation when given (3,0), (-3,2)
Answers
Answer:
Assuming you want slope intercept form then -1/3x+1
Step-by-step explanation:
Please no wrong answers
John bought 6 dumplings for $3.00.
Let x represent the number of dumplings purchased, and let y represent the total cost.
Graph the line that represents the proportional relationship.
Answers
Answer:
R.s:$0.5
Step-by-step explanation:
Let x be the n.o of dumplings and y be the total cost of it
or,x=y
or,6=$3.00
=3.00÷6
=$0.5,,
Brainliest
Use substitution to find the ordered pair of the following system of equations:
y=6xy
y=5x+7
(_,_)<------ answer insert.
Answers
Answer:
hey i know this might not help the way you want it to but try using khan Academy these videos might be helpful
Step-by-step explanation:
Collect like terms to simply the expression
3r + (-3r) =
Blank 1:
Question 8 (1 point)
Collect like terms to simplify the expression
2j + (-9j) =
Blank 1:
Question 9 (1 point)
Collect like terms to simplify the expression
12 + 4b - 3 + 2c =
Blank 1:
Question 10 (1 point)
Collect like terms to simplify the expression
7y + 8 - 2y + 4 =
Blank 1:
Question 11 (1 point)
Collect like terms to simplify the expression
2a + 3b - 3a + 4c - b =
(This is not the same as the question before. Look closely.)
Blank 1:
Question 12 (1 point)
What is the perimeter of this triangle (in simplest form)?
Your answer should not have parentheses or multiplication symbols !
Blank 1:
Question 13 (1 point)
Which TWO expressions below are equivalent? (Make sure to click TWO answers !)
a
2(x - 5) + (-7)
b
2x - 17
c
2x - 12
d
x + (-7) + x + 5
e
x + (-7) + (-10)
Question 14 (1 point)
What shows the proper factoring of this expression?
4d + 24
a
4(d + 6)
b
2(d + 12)
c
4d(4 + 6)
d
6(d + 4)
Question 15 (1 point)
What is the proper factoring for this expression?
50 + 25x + 75y
a
75(x + y)
b
25(2 + x + 3y)
c
25(2 + 2x + 3y)
d
25(x + 3y)
Question 16 (0 points)
How confident do you feel about your ability to master this material by January 19?
(Don't worry--by the time we get to the first quiz, you will have had many chances to practice the ideas from this pre-test.)
a
Very confident
b
Pretty confident
c
A little confident
d
Not very confident
Answers
Answer:
1=0 2
Step-by-step explanation:
I need help with this problem if you know how to do it please helppppp meeeee
Answers
Answer:
I believe its -5 1/4
Step-by-step explanation:
Cymath is a good help.
can somebody give me a ratio problem for 1:4 (for example For every batch of cookies Eva makes she needs 4 tablespoons of butter) I need a ratio problem like that for 1:4
Answers
Nikki and Nikko can do 140 jumping jacks in 6 minutes. How long will it take them to complete 350 jumping jacks? Use at least 2 ways to show your answer.
Answers
Answer:
Jumping jacks are a great way to get your heart pounding, but how ... Jumping jacks might seem like a basic exercise, but they offer some ... According to MyFitnessPal, jumping jacks can burn about eight calories per minute for a person ... For example, if you weigh 150 pounds and perform five minutes of ...
Step-by-step explanation:
Answer:
it will take 15 minutes.(
Step-by-step explanation:
140=6 min
70= 1/2 of 140 so 3 min
140X2=280+70=350
Which of the equations is graphed below?
A. y=-2x + (1)/(2)
B. y = -2x – 1
C. y=-2x-(1)/(2)
D. y = -2x + 1
Answers
slope 2/-1 (or -2), y intercept is +1
PLEASE HELP ME ASAP!!
Fifty percent of the area of this rectangle is shaded. What is the area of the shaded region? Explain your thinking.
Answers
Answer:
hey we cant see the rectangle but if you show me i can help
Step-by-step explanation:
if it's 3:50 p.m., what time will it be in 2 1/2 hours?
if it's 9:25 a.m., how long will it be until the time is 1:15 pm?
Answers
Answer:
1. 5:20
2. 4 hours and 10 minutes
Step-by-step explanation:
Answer:
it will be 5:20 for the first one
Step-by-step explanation:
Heather bought 5 apples for $3 and a melon. The total cost for the fruit was $4.95. How much did the melon cost? Identify the equation you could use to represent the situation where m represents the cost of the melon. *
3m = 4.95
3 + m = 4.95
5 + m + 4.95
15 + m = 4.95
Answers
Answer:
Let m be the number of miles Travis runs each week. I ... Pineapple: P; Watermelon: W ... It will take you 5 minutes to make a waffle and 10 minutes to make a ... He has $102 to spend on $5 pens, $3 pencils, and $9 notebooks. ... Write a system of equations that Tommy could use to solve for the amount of each ...
Step-by-step explanation:
Explanation: sjnwisbcuwvfibwxb
Stephen says that the numbers 38 and 40 are relatively prime. Explain why he is incorrect in making this statement.
Answers
Answer: 38 and 40 are both even numbers.
even numbers cannot be prime numbers; as they have their own factors.
prime numbers only have two factors: the number 1 and the number itself.
example: 17 is a prime number. the only factors it has is 1 and 17.
38 and 40 are both divisible by 2, so they have more than two factors:
38 = 1 * 38, 2 * 19
40 = 1 * 40, 2 * 20, 4 * 10, 4 * 5
therefore, they are not relatively prime, or prime at all; they are even numbers.
Answer:
they are not because 40 has more that 1 factor it has more than 2 which makes it composite 38 on the other hand is relatively prime it only has 2 factors
Step-by-step explanation:
Justin and his friend Dan went to the movies. If they each bought popcorn for $4.25 and a soda for $2.25, what was their total bill after adding 5 ¼ % sales tax?
Answers
Answer:$6.84
Step-by-step explanation:
$4.25 + $2.25 = $6.50
5 1/4% in decimal form is 5.25%
6.50 multiplied by 5.25% = $0.34
$6.50 + $0.34 = $6.84
NEED ANSWERS ASAP 10 QUESTIONS IF RIGHT WILL GIVE BRAINLIEST
Answers
What is wrong with this equation 7/9-8/9=1/9
Answers
Answer:
the answer would be -1/9
because you're subtracting 8/9 from 7/9, not the other way around.
Step-by-step explanation:
Answer:
see below
Step-by-step explanation:
7/9-8/9=1/9
We have a common denominator
( 7-8) 1
--------- = ----
9 9
7 -8 is equal to -1 not 1
The answer should be -1/9 not 1/9
PLS help me with my math.
Answers
Answer: A
Step-by-step explanation: You have so much tabs open
What is f(-2) if f(x) =1/2x?
Answers
I HATE word problems can you do this?
Answers
Answer:
Joshua started the week with $25
Step-by-step explanation:
He spent $3 every day during the school week = $15
He bought a ticket for the school play = $5
he loaned money to his friend = $2
He had money left in his wallet = $3
15 + 5 + 2 + 3 = 25
- Sorry if my explanation does not make sense I tried my best to write it in English.
Please answer this. Thankyou!
Answers
The y-intercept is b=y1−m⋅x1
b
=
y
1
−
m
⋅
x
1
.
b=1−(3)⋅(3)=−8
b
=
1
−
(
3
)
⋅
(
3
)
=
−
8
.
Finally, the equation of the line can be written in the form y=mx+b
y
=
m
x
+
b
.
y=3x−8
y
=
3
x
−
8
.
Answer:
The slope of the line is m=3
m
=
3
.
The equation of the line in the slope-intercept form is y=3x−8
y
=
3
x
−
8
.
The equation of the line in the point-slope form is y−1=3(x−3)
y
−
1
=
3
(
x
−
3
)
.
The general equation of the line is 3x−y−8=0
3
x
−
y
−
8
=
0
.