Answer:
2065 ÷ 7 = 295
295 × 8 = 2360
Christina will have scored 2,360 points.
f(x)= -10x+6 Evaluate the function.
f(-2)=
a.-26
b.-14
c.0.8
d.26
Answer:
D. f ( - 2 ) = 26
Step-by-step explanation:
Step 1:
f ( x ) = - 10x + 6 Function
Step 2:
f ( - 2 ) = - 10 ( - 2 ) + 6 Input x value
Step 3:
f ( - 2 ) = 20 + 6 Multiply
Answer:
f ( - 2 ) = 26 Add
Hope This Helps :)
What is the result of 5 divided by one-fifth? 5 fraction bars. Each bar is labeled 1 with 5 boxes labeled one-fifth underneath. StartFraction 1 Over 25 EndFraction One-fifth 1 25
Answer:
25
Step-by-step explanation:
Answer:
it is 25
Step-by-step explanation:
What are the relative maximums of the function: f (x) = x²-3x + 5
Answer:
(3/2,11/4)
Step-by-step explanation
-b/2a to find the axis of symmetry
3/2= axis of symmetry
Then plug that in to find the vertex/maximum or minimum
3/2^2-3(3/2)+5
9/4-9/2+5
You can only add fractions with like denominators multiply 9/2(2/2) and 5(4/4)
So, 9/4-18/4+20/4
9/4-18/4= -9/4+20/4= 11/4
So the maximum is
(3/2, 11/4)
se lanza una piedra a un estanque de agua tranquila el cual crea ondas concentricas que aumentan el radio al pasar el tiempo. cuando la onda exterior alcanza 3 metros de radio, aumenta a una rapidez de 5 cm/s¿a que rapidezaumenta dicha areadel circulo por dicha onda?
This is what she/he is saying:
A stone is thrown into a pool of calm water which creates concentric waves that increase the radius over time. When the external wave reaches a radius of 3 meters, it increases at a speed of 5 cm / s, at what speed does this area of the circle increase by said wave?
Which of the following is a benefit to using a random sample for an observational study?
Answer:
Step-by-step explanation:
Even though no answer choices are given, the main benefit of this is that by choosing a randomly from a population it allows every single individual to have the same chance of getting chosen and observed. This randomness allows for that sample group to much more accurately represent the entire population that is being observed without having to conduct additional research. Therefore, becoming extremely useful in such studies.
A sample is a group that is taken out of the population to be tested.
A random sampling occurs when subjects are being selected for a study
The benefit of using random sampling is that each subject in the population is equally likely to be selected and the resulting sample is likely representative of the population.
Random sampling allows for unbiased estimates to be created, but at the cost of efficiency within the research process
Some advantages of random sampling shown below,
It has less risk of carrying an error.There is an equal chance of selection.It requires less knowledge to complete the research.Learn more:
https://brainly.com/question/14912731
Just help with 7,8, and 10 I already got help with the rest also I’ll mark brainliest for a small explanation:)
Express it in slope form
not sure need help
Answer:
192
Step-by-step explanation:
There are 2 ways of solving for <4
The first is just to add the 2 angles not connected to <4
<4 = 51 + 51 = 102
The second is to find <2 and take that away from 180
<2 + 51 + 51 = 180
<2 = 180 - 102
<2 = 78
<4 + <2 = 180 (They are supplementary
<4 = 180 - 78
<4 = 102
Can 5x+5y be added together to make 10xy?
Answer:
no
Step-by-step explanation:
Evaluate this expression. -86.4 + 16.38
Answer:
The answer is -70.22
Step-by-step explanation:
Answer:
-70.20
Step-by-step explanation:
10 points
Three-fourths was subtracted from a number, and then 5 1/4 was added to the result. The sum was -7.
What was the original number?
A. 3 1/2
B. -11 1/2
C. 2 1/2
D. -3 1/2
three children each eat 2/3 of a cake how much cake is eaten altogether?
Answer:
childre=3 cake eaten 2/3 so total eaten cake by children will be 2/3*3=2
[tex]2/3*3=3[/tex]
Step-by-step explanation:
The line r represents f(x)=x-4/3.therefore,the line that represents f^-1 is ___ and f^-1(x)=____ x+____.
Answer:
f^-1 is P and f^-1(x) = 3x+4
Step-by-step explanation:
I did the work in my notebook but pretty much to find the inverse of [tex]\frac{x-4}{3\\}[/tex] you gotta do an equation and yeh its pretty simple.
The solution is , f^-1 is P and f^-1(x) = 3x+4.
What is an expression?An expression is any mathematical statement which consists of numbers, variables and an arithmetic operation between them. In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.
here, we have,
from the given figure, we get,
The line r represents f(x)=x-4/3.
so, we get,
f^-1 is P
let, y = f(x)
and, f^-1(y)=x
i.e. y = x-4/3.
3y=x-4
x=3y+4
so, f^-1(y) = 3y+4.
and f^-1(x) = 3x+4.
To learn more on Expression click:
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Subtract 5x^2 – 2x – 5 from – 2x^2
- 5x - 7
Answer:
[tex]-7x^{2} -3x-2[/tex]
Step-by-step explanation:
[tex](-2x^2-5x-7) - (5x^2-2x-5)\\\\-2x^2 - 5x^2 = -7 x^2\\-5x - -2x = -3x\\-7 - -5 = -2 \\Result: -7x^2-3x-2[/tex]
Answer:
-7x² -3x - 2
Step-by-step explanation:
(-2x²-5x -7) - (5x² - 2x - 5)
removing parentheses
-2x² -5x - 7 -5x² + 2x + 5
collect like terms
-2x² - 5x² -5x + 2x -7 + 5
= -7x² -3x - 2
You are starting your own small business in Alabaster. You borrow $10,000 from the bank at a 9% rate for 5 years. Find the interest you will pay on this loan
Answer:
Step-by-step explanation:
F
The monthly cost (in dollars) of water use is a linear function of the amount of water used (in hundreds of cubic feet, HCF). The cost for using 14 HCF of water is $33.79, and the cost for using 27 HCF is $55.24. What is the cost for using 18 HCF of water?
Answer:
The cost of using 18 HCF = $40.39
Step-by-step explanation:
A linear function is one that has a constant rate of change for all the values within the distribution. For a linear function, there is a constant, and that constant is known as the slope or gradient of the linear function.
Let us first calculate this constant (slope).
Let:
X₁ = 14 HCF, Y₁ = $33.79, X₂ = 27 HCF, Y₂ = $55.24, m = slope
[tex]m = \frac{Y_2-Y_1}{X_2 - X_1} \\m = \frac{55.24 - 33.79}{27-14} \\m = \frac{21.45}{13} \\m = 1.65[/tex]
at any two points on the linear function, the rate of change of the cost to HCF = 1.65
Now, Let X₃ = 18 HCF, Y₃ = cost for using 18 HCF
[tex]m = \frac{Y_3 - Y_1}{X_3-X_1} \\where\ m= 1.65\\1.65 = \frac{Y_3-33.79}{18-14}\\1.65 = \frac{Y_3 - 33.79}{4} \\6.6 = Y_3 - 33.79\\Y_3 =6.6+33.79\\Y_3 = 40.39[/tex]
Therefore, the cost of using 18 HCF = $40.39
N:B X₂ and Y₂ can also be used with X₃ and Y₃ to find Y₃. You can try it out, you should get the same result
(U will get brainliest if u help! Pls write at least 2 sentences to support your answer :D )
What is 4 x 3/8 ?
4 × 3
8
= 4 × 3
8
= 4 × 3
8
= 2 × 3
4
= 1 × 3
2
= 1 × 3
2
= 3
2
= 1.5
What are two values that could bring you a sum of (-12)?
Possible Answers:
any two nubers that add up to -12 work:
12 + (-24)
11 + (-23)
10 + (-22)
9 + (-21)
8 + (-20)
7 + (-19)
6 + (-18)
5 + (-17)
4 + (-16)
3 + (-15)
2 + (-14)
1 + (-13)
0 + (-12)
-1 + (-11)
-2 + (-10)
-3 + (-9)
-4 + (-8)
-5 + (-7)
-6 + (-6)
-7 + (-5)
-8 + (-4)
-9 + (-3)
-10 + (-2)
-11 + (-1)
-12 + (-0)
What should she do next to find 42 to the nearest hundredth?
A. She should find the squares of numbers between 6.5 and 6.6,
B. She should find the average of 6.4 and 6.5.
C. She should estimate that 42 is 6.50
D. She should find the squares of numbers between 6.4 and 6.5.
Answer:
D
Step-by-step explanation:
Did the quiz
What is the scale factor of triangle A to triangle D.
Answer:
the correct answer is isosceles
Answer:
When two shapes are similar, their corresponding angles will be the same. The angles are the same because the shape is still the same. You can tell from the order of the similarity statement which angles match up. In the example, angles A and D are the same (both letters are in written first), angles B and E are the same (both letters are written in the middle), and C and F are the same
Step-by-step explanation:
Similar triangles can be different sizes, so the lengths of the corresponding sides are not necessarily the same, but they are proportional. This means that the ratios of the corresponding sides are equal.
The distance from point F to point G on a line segment is 5. Point F is at (4,a) and point G is at (1,6). What is the value of coordinate "a"?
Answer:
X is up Y is over
X: 3 Y: 9
X: 9 Y: 3
X: 6 Y: 5
X: 5 Y: 6
Hope This Helps
Is this a function?
(-2,3) (-3,3) (2,-3) (3,-3)
Answer:
yes
Step-by-step explanation:
What integer represent 10 degrees above zero?
Answer:
10
Step-by-step explanation:
an integer is an opposite but if it is above zero it is a positive number and and integer of a positive number is another positive number
1\2g+2g-3\4g+7
Can someone please help
NEED HELP !!! give the following information about the linear function shown below. If unsure about placement, round to the nearest half.
Answer:
slope = -3
x-intercept = (4/3,0) = (1.33,0)
y-intercept = (0,4)
f(-1) = 7
Step-by-step explanation:
Take 2 known points
i.e (0,4) and (1,1) from the graph
slope = (1-4)/(1-0) = -3
now we have
linear equation
y = mx+c
we have (0,4)
4 = -3 * 0 + C
C =4
so the equation of line is
y = -3x + 4
now
f(-1) = -3 * -1 +4 = 3+4 =7
for x intercept, put y = 0
o = -3x + 4
x = -4/-3 = 4/3
for y intercept, x = 0
y = -3 * 0 + 4 = 0+4 = 4
can you help me with that
Answer: 55% or 11/20
Step-by-step explanation:
The local newspaper has letters to the editor from 70 people. If this number represents 4% of all of the newspapers readers, how many readers does the newspaper
Answer:
1750
Step-by-step explanation:
We first find the rate
70/4
= 17.5
We know 17.5 is 1% of the people that read newspaper, we will multiply 17.5 by 100 as it would represent 100% of the people
17.5 * 100
= 1750
A water tank is in the shape of an inverted cone with height twice its radius. Water is being pumped into the tank at a rate of 2m3/min. Find the rate at which the water level is rising when the water is 3m deep.
Answer:
dh/dt = 8/9π
Step-by-step explanation:
Given that
Volume of A cone = 1/3πr²h.
Assuming v is the volume of the tank, then dv/dt = 2 m³/min
Assuming h is the height of the water we're looking for dh/dt
To start, we need to find a relationship between dh/dt and dv/dt
We then write v as a function of h, instead of having it as h & r, and then by using similar triangles, we notice that
r/h = 2/4, essentially, r = h/2.
Now, we substitute for this r, in the formula for volume
V = 1/3πr²h
V = 1/3 * π * (h/2)² * h
V = 1/3 * π * h³/4
If we differentiate v, wrt t, we have
dv/dt = π/12 * 3h² * dh/dt
dv/dt = π/4 * h² * dh/dt
Remember that h = 3, so, substitute for h
2 = π/4 * 9 * dh/dt
8/π = 9 * dh/dt
dh/dt = 8/9π
Please help I will brainliest!! Really urgent!!
and tell you me how you go it, not just the answer please!❤️
Answer:
1/8x - 11
Step-by-step explanation:
-3/8x - 2 + 1/2x - 9
-3/8x + 1/2x - 2 - 9
1/2x = 4/8x
-3/8x + 4/8x - 11
1/8x - 11
PLS MARK BRAINLIEST
Answer:
[tex]\frac{1}{8}x-11[/tex]
Step-by-step explanation:
[tex]-\frac{3}{8}x-2+\frac{1}{2}x-9[/tex]
[tex]-\frac{3}{8}x-2+\frac{4}{8}x-9[/tex] (find common denominator. [tex]\frac{1}{2} * \frac{4}{4} = \frac{4}{8}[/tex] )
[tex]\frac{1}{8}x-11[/tex] (add like terms. [tex]-\frac{3}{8}x + \frac{4}{8}x = \frac{1}{8}x[/tex] and -2 + (-9) = -11 )
What person, Matt or Jane, has a constant rate of pay, and what is it?
Answer: Jane
Step-by-step explanation: Her pay is going up by the same amount, 12, each time.
Answer:
Matt's pay is not linear
Jane's pay is linear, and it is $12/hour
Step-by-step explanation:
Matt's Earnings:
As the time goes from 1 hour to 2 hours, the difference in hours is 1, the difference in pay is $8. From 2 hours to 3 hours, the difference in hours is again 1, but the difference in pay is $11. Since equal changes in x do not produce equal changes in y, Matt's earnings are not linear.
Jane's Earning:
As the time goes from 1 hour to 2 hours, the difference in hours is 1, the difference in pay is $12. From 2 hours to 3 hours, the difference in hours is again 1, and the difference in pay is again $12. Since equal changes in x produce equal changes in y, Jane's earnings are linear.
Jane's rate of pay is $12/hour