Answer:3
Step-by-step explanation:
f(2)-f(4) when f(x)=2x+1
Evaluate and solve
Answer:
f(2)= 5 and f(4)=9= -4
Step-by-step explanation:
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[tex]f(x) = 2x + 1[/tex]
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[tex]f(2) = 2(2) + 1[/tex]
[tex]f(2) = 4 + 1[/tex]
[tex]f(2) = 5[/tex]
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[tex]f(4) = 2(4) + 1[/tex]
[tex]f(4) = 8 + 1[/tex]
[tex]f(4) = 9[/tex]
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[tex]f(2) - f(4) = 5 - 9 = - 4[/tex]
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What is the perfect square of 4 with an exponent of 2
Answer:
[tex]\sqrt{4^{2}[/tex] = 4
Step-by-step explanation:
the square root cancles out the exponet because it's just the same thing. One is a negative impact the other is positive.
if sally has 456 bells for her cows and her friend only has 1 and sally gives her friend 400 how many does sally have left?
Answer:
Step-by-step explanation:
Sally will have 56 bells left over. It is simple subtraction you subtract 400 from 456 because that is how many bells she is giving away.
Also would appreciate it if you could mark me Brainly.
A school printed 315 tickets to the spring dance. There are 255 tickets left. Which equation can be used to find how many tickets have been sold?
You didn't add any options but here's one that would work.
315 - 255 = 60
When there is a problem asking how many are left, taken, sold, given, etc. You are usually dealing with subtraction.
Hope that helps and have a great day!
Answer:
The last choice (x+255=315 )
Step-by-step explanation:
This is because we know the total number of tickets is 315 and they have 255 left. So, x + 255 = 315. Because you subtracted __ from 315 to get 255. You can rewrite that as __ + 255 = 315 or x + 255 = 315
if f(x)=2x^3-2, what is the value of f(2)
Answer:
The answer is F(2) is equal to 15
Step-by-step explanation:
My knowledge is so powerful my brain hurts when I think.
Hope this helped
this was easy!
let me know if you want help with anything else
if each side of the cube shown above has the same length as the measured side what is the approximate volume of the cube
Answer:
The measured side is not shown, so i will answer in a general way.
A cube is a 3-dimensional object with 6 square faces.
You know that all the sides of a square have the same length, then is the same for the cube.
To calculate the volume of a cube, we start with the area of the base.
The base is a square of sidelength L (Suppose that L is the length of the measured side)
The area of the base is:
A = L^2.
To find the volume, we must multiply the area of the base by the height of the fire (because the section of the base does not change).
And the height of the cube is also L.
Then the volume is:
V = L*a = L^3
All of the following are rational numbers: .5, 7, V16
O True
O False
Answer:
Your answer is: A) True
( I say true because 1) .5 2) 7 are rational) ( I dont know about v16, if that is what it is supposed to say, then I cant quite tell)
A rational number is any integer, fraction, terminating decimal, or repeating decimal.
Step-by-step explanation:
Hope this helped : )
What is .85 as a percent
Answer:
85%
Step-by-step explanation:
Move the zeros two places
HELP ME PLEASE!!! I NEED HELP!!!!
Answer:
If I had to take a guess, I'd say B.
Step-by-step explanation:
The Baldwin family walked 4/5 of a mile in 4/9 of an hour. What is their unit rate in miles per hour?
Answer:
1.8
Step-by-step explanation:
Unit rate in mile per hour
= 4/5 mile / 4/9 hour
= 4/5 * 9/4 = 9/5 miles per hour
= 9/5 = 1.8 miles per hour
((h – k)(3)
Please answer quickly!!!!
Answer:
[tex](h – k)(3) = h3 - k3[/tex]
PLEASE HELP ASAP!! 50 POINTS!!
The following table shows how far a bus has gone in t hours. Which of the following equations represents this information?
A. d = 50t + 22
B. d = 61t
C. t = 61d
D. t = 50d + 22
Answer:C
Step-by-step explanation:
Answer:
t=61 d
Step-by-step explanation:
c is your answer
Which table represents a proportional relationship that has a constant of proportionality equal to 0.8?
Answer:
correct answer is B
Step-by-step explanation:
hi
PLEASE SOLVE QUICKLY I WILL MAKE YOU BRAINLIEST!!!
solve for both X and Y, please do it fast it's due soon!!! thankyou!!
Answer:
x=25°, y=18°
Step-by-step explanation:
Solved! Here is the explanation. As we have supplementary angles, we have a total of 180° of angles. Angle BXD is a right angle, so 2x+40°=90°. 2x=50°, and then we have x=25°. Now, to figure out y, we have to look at angle BXA. In this case, 5y=90°. y=18°. So, x=25° and y=18°. Hope this explanation helps!
(PLEASE ANSWER ILL GIVE YOU 20 POINTS) Determine if the relation is a function. If the relation is a function, find the domain and range.Required to answer. Single choice.
Answers:
The relation is a function
Domain = {-2, -1, 0, 1, 2}
Range = {-2, 0, 2}
=================================================
Explanation:
The blue points shown are
(-2,-2)
(-1,0)
(0,2)
(1,0)
(2,-2)
Note how the x values do not repeat themselves. Visually this graph passes the vertical line test. It is impossible to draw a single straight vertical line through more than one blue point at a time. It tells us that any x input leads to exactly one y output.
The relation is a function
The domain is the set of x coordinates of the points
Domain = {-2, -1, 0, 1, 2}
The range is the set of y coordinates of each point
Range = {-2, 0, 2}
Toss out any duplicate items that may occur in the range.
Answer:
The relation is a function.
The domains are 2, 1, 0, -1, -2.
The ranges are -2, 0, 2, 0, -2
Nola hiked down a trail at a steady rate for 10 minutes. Her change in elevation was −190 feet. Then she continued to hike down for another 20 minutes at a different rate. Her change in elevation for this part of the hike was −200 feet. During which portion of the hike was her rate of change in elevation greater? Complete the explanation. Her rate was faster in the (Select: First, Second) part of the hike, because her heart rate was ____ ft/min in the first part and ___ ft/min in the second part.
Answer:
Her rate was faster in the FIRST because her rate was - 19 ft/ minutes in the FIRST PART and - 10ft/minute in the SECOND part
Step-by-step explanation:
Portion 1
Time taken to hike down = 10 minutes
Change in elevation = - 190 ft
Portion 2
Hiked down for further 20 minutes
Change in elevation = - 200ft
During which portion of the hike was her rate of change in elevation greater?
Rate of change in elevation :
Change in elevation / time
Portion 1:
Rate of change in elevation :
Change in elevation / time
- 190 ft / 10 minutes = - 19 ft/minutes
Portion 2:
Rate of change in elevation :
Change in elevation / time
- 200 ft / 20 minutes = - 10 ft/minutes
Her rate was faster in the FIRST because her rate was 19 ft/ minutes in the FIRST PART and 10ft/minute in the SECOND part
What is the equation of the line that passes through the point (5,1) and has a slope
of 6/5?
Answer:
y-1 = 6/5(x-5) Point slope form
y-1=6/5x - 6
y-1 +1=6/5x -6+1
y = 6/5x - 5 Slope intercept form
y -6/5x + 5 = 6/5x-5 -6/5x+5
y-6/5x+5=0 General Form
I received $385 back from the government, which represented the 17.5% purchase tax on a piece of equipment. How much did I pay for this equipment in the first place?
Answer:
[tex]the \: equipment \: price \: is : 2,200.[/tex]
Step-by-step explanation:
[tex]let \: the \: original \: price \: be \: x \\ then \: 17.5\% \: of \: x = 385 \\ \frac{17.5}{100} \times x = 385 \\ 17.5x = 100 \times 385 \\ x = \frac{38500}{17.5} \\ x = 2,200.[/tex]
What is the degree of the expression below?
x2-3x +7
Answer:
1
Step-by-step explanation:
Matt filled his pail with 16 kg of sand, but found that it was too heavy to carry. He scooped out 7 kg of the sand. What is the mass of the sand in the pall now?
9 g
9001
9 kg
9g
Answer:
9kg
Step-by-step explanation:
..................
Answer:
9kg
Step-by-step explanation:
16k-7kg=9kg
Two groups of hikers take two different routes from Camp A to Camp B. The first group leaves Camp A at 9:00 AM and takes a route that is 30 miles longer than the second group's route. The second group leaves Camp A at 1:00 PM. Their hiking speed is 2 mph slower than the first group's speed. Both groups reach Camp B at 4:00 PM. How fast does each group hike?
Answer: first groups hiking was 6mph, second groups was 4mph.
Step-by-step explanation:
Speed of first group = 6 mph
Speed of second group = 4 mph
We are told that first group leaves Camp A at 9:00 AM.If the normal distance between camp A and camp B is x, then the total distance this first group covers will be;
(x + 30) miles
This first group reached camp B at 4pm. This is 7 hours from when they left camp A.Thus, their speed is;
v1 = (x + 30)/7 mph
We are told that;Second group left by 1pm and got to camp B by 4pm. This is 3 hours.
We are also told that their speed was 2mph slower than the first group.Thus;
v2 = ((x + 30)/7) - 2 mph
Since normal distance from camp A to camp B is x. Then this second group will have;x = ((x + 30)/7) - 2) × 3
Since;
distance = speed × time
Divide both sides by 3 to get;
x/3 = ((x + 30)/7) - 2)
Multiply through by 21 to get;
7x = 3(x + 30) - 42
7x = 3x + 90 - 42
7x - 3x = 48
4x = 48
x = 48/4
x = 12 miles
Thus, putting 12 for x in V1 equation gives;
v1 = (12 + 30)/7
v1 = 42/7
v1 = 6 mph
Similarly;
v2 = ((12 + 30)/7) - 2
v2 = (42/7) - 2
v2 = 6 - 2
v2 = 4 mph
Read more at; brainly.com/question/18642827
Which of the following equations have the same solution as 3x-5=5x×11
Answer:
-5=2x+11
Step-by-step explanation:
Y
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2(x) = 3x^(2)+ 2x
Answer:
x=0
Step-by-step explanation:
to solve the equation:
2(x) = 3x²+ 2x
swap the sides:
3x² = 0
Divide both sides:
x²=0
Solution:
x=0
what does a transformation mean?
Answer: Transformation means to change in a form like for example it can changes in any given geometric shape.
What is the equation olf the line that is parallel to the gven line and has an x-intercept of 3? Oy-x+3 Oy-x+2 Oy=-x+3 Oy=-x+2
Answer:
It’s D
Step-by-step explanation:
The equation of the parallel line is y = x - 3, the correct option is C.
What is y-intercept of a function?The intersection of the graph of the function with the y-axis gives y-intercept of that function. The y-intercept is the value of y on the y-axis at which the considered function intersects it.
Assume that we've got: y = f(x)
At y-axis, we've got x = 0, so putting it will give us the y-intercept.
Thus, y-intercept of y = f(x) is y = f(0)
We are given that;
x-intercept = 3
Now,
we can find the equation of the line parallel to the given line and passing through the point (3, 0):
The given line has an equation of y = x + 3. This is already in slope-intercept form, so we can see that the slope is 1. The parallel line will have the same slope of 1.
The point that the parallel line passes through is (3, 0). We can use this point and the slope to write the equation of the parallel line in point-slope form:
y - 0 = 1(x - 3)
y = x - 3
Therefore, the slope intercept will be y=x-3
Learn more about y-intercept here:
https://brainly.com/question/16540065
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Camelia misses 8 points on the first math test. She misses 5 points on the second math test. What integer represents the number of points Camelia misses on the first two test?
a=4, b=2 and c=-3
who wanna tell me the answer lol my Photomath won’t tell me
Answer:
-23
Step-by-step explanation:
Answer:
-23
Step-by-step explanation:
Just plug in the values of the variables into the expression. You'll get -4(10)/2 - 3. That equals -20 - 3, or -23.
Will give brainliest, like, comment, and 5 points
Could you please answer this:
The answers you can choose are proportional or non-proportional.
find the values of a and b
Answer:
Im not sure about a but, b= 38
Step-by-step explanation
b: 90 - 52 = 38
*90 because it is a right angle
Mr. Lin received a box of books in the shape of a rectangular prism. The volume of the box is 486 in 3. What is the width of the
box?
18 in.
Use the formula W=Th, where l is the length of the prism, h is the height, V is the volume, and w is the width.
6 inches
9 inches
27 inches
81 inches
Mark this and return
Save and Evi
Answer:
W = 9 inches.
Step-by-step explanation:
The volume of a rectangular prism is given by
[tex]V=whl[/tex]
Where
w,h and l re width, height and length of rectangular prism
It is not mentioned that a box has a length of 18 inches and a height of 3 inches.
Using above formula.
[tex]486=w\times 18\times 3\\\\486=54w\\\\w=9\ \text{inches}[/tex]
So, the width of the box is 9 inches.