Answer:
f(3) = 9
Step-by-step explanation:
To evaluate f(3) substitute x = 3 into f(x), that is
f(3) = 2(3) + 3 = 6 + 3 = 9
Answer:
f(3) = 9
Step-by-step explanation:
f(3) = 2x + 3
input the 3 into all x values since it is f(x) basically it tells you the value of x
f(3) = 2(3) + 3
f(3) = 9
4(15)+7) Plz help
HURRY
Answer: 88
Step-by-step explanation:
First use the distributive property.
4(15 + 7) can turn into 4(15) + 4(7)
Then we simplify until we get the answer.
4(15) = 60
4(7) = 28
Then it is...
60 + 28
Just add them together...
60 + 28 = 88
So the answer is 88. I hope this helps, and I hope it's not wrong, but I do not think it is.
21. Which equation matches the table?
Answer:
D. is the match of the equation
Felipe is planning a party. He has $50.00 to spend on sandwiches that cost $2.50 per person, $25.00 to spend on drinks that cost $1.50 per person, and $25.00 to spend on gift bags that cost $3.00 per person. Which expression could be used to show the amount of money he will have left over if x people attend the party? 50 + 7 x 100 minus 7 x 2.50 x + 1.50 x + 3.00 x 100 minus (2.50 x minus 1.50 x minus 3.00 x)
Answer:
100-7xStep-by-step explanation:
given data
amount for sandwiches=$50
amount for drinks is $25
amount for gift bags=$25
total amount=$100
the number of persons be x
cost of sandwiches= 2.5x
cost of drinks= 1.5x
cost of bags =3x
therefore the total cost is
2.5+1.5+3=$7
the balance is
total amount -total cost
Balance=100-7x
Answer:b
Step-by-step explanation: I took the test :3
Trash management charges its customers a fee of $25 plus $8 for each trash can they need emptied. If a customer received a bill for $65, how many trash cans did they need emptied? **When writing the equation, be sure to use correct form, NO capital letters (x only), and NO spaces
Answer:
28+8x
12x
Step-by-step explanation:
you would plug in numbers for x until one of them is cheaper in this case waste away is cheaper by $8 after 5 trash cans
what is 3 plus three
Answer:
6
Step-by-step explanation:
| | | + | | | = 6
Mrs. Raditz pays you $2 per hour to babysit her perfect and adorable little children (aren't you lucky!).
You babysit for 4 hours. How much money do you make? Write a mathematical expression and simplify and
state the final answer.
Answer:
$8
Step-by-step explanation:
2 x 4 = 8
Answer:
8
Step-by-step explanation:
2x4=8
It takes Kelsey 5 hours to make 12 pendants. If she works 8 hours per day for 3 days before the craft fair, can she make enough additional pendants to sell so that she can make a profit of at least $50?
Answer:
From a search on google, the first part of this problem is:
Kelsey has to pay $200 to rent a booth at the craft fair. The materials for each pendant cost $7.80, and she plans to sell each pendant for $13.50. To make a profit, she must make more money than she spends. Kelsey has already made 10 pendants.
We know that:
I takes Kelsey 5 hours to make 12 pendants.
She works 8 hours per day, for 3 days.
then she works a total of 24 hours.
We want to find the number of pendants that she can make in that time, first, how many groups of 5 hours there are in 24 hours?
(24h/5h)
And in each one of those groups, she can make 12 pendants, this means that the total number of pendants that she will make is:
(24h/5h)*12 = 57.6 pendants.
And we should round it down to 57 pendants because 0.6 of a pendant does not make sense.
Now let's calculate the profit.
Remember that the profit is the difference between the revenue and the costs.
The costs will be:
C(x) = $200 + $7.80*x
Where x is the number of pendants that she made.
In these 3 days, she made 57 pendants, plus 10 that she did before, she has 67 pendants, then x = 67.
C(67) = $200 + $7.80*67 = $722.60
And the revenue will be:
R(x) = $13.50*x
for the 67 pendants:
R(67) = $13.50*67 = $904.50
Then the profit will be:
P = R - C = $904.50 - $722.60 = $181.90
So yes, her profit will be a lot more than the minimal of $50 asked in the question.
Graph the Linear Function g(x) = x + 7
please show the table and graph points! i will give a brainliest!!
Which expression is equivalent to 24 - (-6)
Answer:
24 + 6
this is the correct answer
Explaination:
the subtraction sign cancalles out the negative in front of the 6
Light travels at around 186,000mph. The rule d=186,000t describes the relationship between the distance d in miles and t seconds. How far does light travel in 20 seconds? how far does light travel in 1 minute? How long does it take light to travel 20,000,000 miles?
Answer:
Step-by-step explanation:
Why is the speed of light travels 300,000 km per second in a vacuum, ... the same thing, but nobody is tackling the question of why light can't move faster. ... What happens if you travel faster than the speed of light? ... The theory of relativity has a lot to say about the relationship between space and time.
What is the value of y in the equation 3/4(2y + 4) = 30 ?
PLEASE HELP ME!!
For the circle centered at the origin with radius 4 and equation x^2+y^2=16, find dx/dt at the first quadrant point where x=2 if dy/dt=-3 at that instant.
Answer:
dx/dt = 12
Step-by-step explanation:
Given the equation of a circle expressed as:
x²+y² = 16
Differentiate the expression with respect to x
2x dx/dt + 2y dy/dt = 0
Given
x = 2
dy/dt = 3
Required
dx/dt
Substitute the given parameters into the resulting differential equation
2x dx/dt + 2y dy/dt = 0
2 dx/dt + 2(4) (-3) = 0
y = 4 since the radius is 3,
2 dx/dt - 24 = 0
2 dx/dt = 24
dx/dt = 24/2
dx/dt = 12
Using implicit differentiation, it is found that:
[tex]\frac{dx}{dt} = 4 + 3\sqrt{3}[/tex]
The equation of the circle is:
[tex]x^2 + y^2 = 16[/tex]
We are given x = 2, then:
[tex]2^2 + y^2 = 16[/tex]
[tex]y^2 = 12[/tex]
[tex]y = \pm \sqrt{12}[/tex]
First quadrant, thus, positive:
[tex]y = \sqrt{12}[/tex]
[tex]y = 2\sqrt{3}[/tex]
Applying implicit differentiation, we have that:
[tex]2x\frac{dx}{dt} + 2y\frac{dy}{dt} = 16[/tex]
We are given that [tex]frac{dy}{dt} = -3[/tex], then:
[tex]2(2)\frac{dx}{dt} - 12\sqrt{3} = 16[/tex]
[tex]4\frac{dx}{dt} = 16 + 12\sqrt{3}[/tex]
[tex]\frac{dx}{dt} = \frac{16 + 12\sqrt{3}}{4}[/tex]
[tex]\frac{dx}{dt} = 4 + 3\sqrt{3}[/tex]
A similar problem is given at https://brainly.com/question/9543179
8x – 2 > -18
solve the inequality and graph the solution on the line provided.
Answer:
When solving inequalities you want to first group all like terms, so you'd first add 8 to both sides, and get rid of the extra number on the left side.
7x ≤ -7
Then you'd isolate the variable, so you should divide both sides by 7.
x ≤ -1
When graphing the equation the solution set includes -1 so you would put a closed circle (filled in). The variable "x" is less than and equal to -1 so you would put the arrow facing left <----.
Step-by-step explanation:
Gabriel took a math test and scored an 80. He got 4 questions wrong and lost 20 points. How many points were each item?
Answer:
Each question was worth 5 points.
Step-by-step explanation:
If every question had the same worth, then that would be easier to calculate.
First divide the points he lost by how many questions.
20 ÷ 4 = 5
Now we have it! Each question is worth 5 points!
But if you want to find how many questions in total the test had, we can do that too!
100 ÷ 5 = 24
The test had 24 questions!
If you find my answer helpful
Pls consider marking my answer as Brainliest! It would mean a lot!
please help me with this question
Answer:
Alternate corresponding anglesI think every line here is a transversal tbhLine C and D10 POINTS- PLEASE HELP-WILL MARK BRAINLIST- :)
Lakeisha (L) is flying a kite as shown. The kite's string is 29 feet long, and the kite (K) is currently at a height of 20 feet. Her dog (D) is directly underneath the kite. What is the distance between Lakeisha and her dog?
a. 25 ft
b. 20 ft
c .9 ft
d. 21 ft
Answer:
D
Step-by-step explanation:
Answer:
Nine
Step-by-step explanation:
please mark me brainlist
If X = 5 and y = 6, what is 2x12/y? A) 12 B) 9.5 C) 8 D) -1/3 PLEASE HURRY AND ANSWER THIS QUESTION ITS DUE TODAY!!!!
Answer:
C)8
Step-by-step explanation:
x=5 ,y=6
therefore , 2×12/6
= 8
Chang is putting money into a savings account. He starts with $450 in the savings account, and each week he adds $60.
Let S represent the total amount of money in the savings account (in dollars), and let W represent the number of weeks Chang has been adding money. Write an equation relating S to W. Then use this equation to find the total amount of money in the savings account after 13 weeks.
Answer: S: $450
W: $780
so $450+$780 =$1230
the answer is $1230
Step-by-step explanation:
what is the slope of the line perpendicular to the lone whose equation is 2x+2y=28
Answer:
The slope of the line perpendicular to the line whose equation is 2x + 2y = 28 is -x.
Step-by-step explanation:
You first isolate y, then divide 2 on both sides. This gives you the equation y = x + 14. To find a slope perpendicular to the line, simply use the negative integer of x, which is -x. The slope of the line perpendicular to the line given is -x.
describe the graph below
linear or nonlinear
Answer:
linear. no repeating X values
Step-by-step explanation:
What is 8+2 I need to know fast!!!!!!
Answer:
10
Step-by-step explanation:
If you add 8 + 1 according to the numbers, it will give you 9. Add another 1, which is the +2. gives 10. 8+2 is 10, seems ez i know ur trolling Imao
Answer
8+2=10
Example:
If you have 8 apples and your friend Joe gives you 2 more, you then have 10 apples.
Solve the inequality: 4+3n≥1 or -3n>25
Answer:
1. n ≥ -1
2. n < -25/3
Step-by-step explanation:
Solving equations with fractions
1/2x-1/2-x=-3/2
Answer:
This is The Answer! Solutions: x=2.
Only answer if you know please don’t just guess
Answer: A. A number squared plus twenty-two.
Step-by-step explanation: I am pretty sure this is right like 99.99999999999% sure.
Two cars are 350 miles apart when they start moving towards each other. The cars are moving with the speeds of 65 mph and 75 mph. How long after they leave will the distance between them be 70 miles?
How long after the cars leave will they be 70 miles apart for the second time?
Answer:
3 hours
Step-by-step explanation:
Simplify
3x + 2(x - 5) +7
Answer:
5x - 3
Step-by-step explanation:
3x + 2(x - 5) +7
3x + 2x - 10 + 7
5x - 3
Find the slope of the line that passes through the points
(2, 1) and (-1,-1).
Answer: slope = 1 --1 / 2 --1
slope = 2 / 3
Answer:
2/3
Step-by-step explanation:
change in y/change in x
-1-1=-2
-1-2=-3
slope is 2/3
3
What is Becca's speed in miles per hour?
Answer: 3/2
Did this on I ready
The speed of Becca for the given data is 3/2 miles per hour.
What is speed?The distance that an object travels in relation to the amount of time it takes to do so can be used to define speed. In other terms, it is a measurement of an object's motion's speed without direction The term "velocity" refers to the combination of direction and speed.
Given the hiking distance of Becca = 9/10 miles
time taken = 3/5 hours
to find the speed,
speed = distance/time
speed = (9/10) ÷ (3/5)
speed = 9/10 x 5/3
speed = 3/2 miles per hour
Hence the speed of Becca is 3/2 miles per hour.
Learn more about speed;
https://brainly.com/question/28224010
#SPJ2
Fill in the blank with the correct number.
The number ________ is divisible by 2, 3, 4, 6, and 10.
A. 44
B. 180
C. 280
D. 385
Answer:
180
Step-by-step explanation:
Answer:
B 180
Step-by-step explanation:
180÷2=90
180÷3=60
180÷4=45
180÷6=30
180÷10=18
3) Solve the equation (x - 1)2 + 2 = x+3.
Answer:
x = 3
Step-by-step explanation:
(x - 1)2 + 2 = x + 3
~Distribute left side
2x - 2 + 2 = x + 3
~Combine like terms
2x = x + 3
~Subtract x to both sides
x = 3
Best of Luck!
Answer:
x is 3 I hope it helps. (if it really helps then I would aprecciate a brainlest)
Step-by-step explanation:
(x - 1)2 + 2 = x + 3 then 2x - 2 + 2 = x + 3 then 2x = x + 3 x=3