Answer:
Step-by-step explanation:
Evaluate the following expression when x = 4 and y = 2.
x²+y3
3
Answer:
24
Step-by-step explanation:
x^2+y^3
(4)^2+(2)^3
(4)(4)+(2)(2)(2)
16+8=24
what is the formula of a²-b²?
Answer:
The formula of a²-b² are as follows:
Step-by-step explanation:
(a-b)(a+b)
(a-b)(a+b) is the answer
30 degrees
60 degrees
150 degrees
Undetermined
Answer:
80
Step-by-step explanation:
Answer:
30 degree
Step-by-step explanation:
because it is parallel to m1=30
Plz help!! Will make brainliest
Answer:
-2x^2-6x-15=0
Step-by-step explanation:
Shift the 15 to the other side to get ax^2+bx+c
-2x^2-6x-15=0
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
HELP I WILL MARK BRAINLIST!!!
Answer:
The answer would be b this is because i did the math and i got 5 yards
Step-by-step explanation:
which equations represent functions that are non-linear? (select all that apply)
Answer:
Step-by-step explanation:
A and B are non-linear; A is a quadratic and B is a cubic.
The functions y-6=x² and y=2x²+5-3x are non-linear. Therefore, options A and B are the correct answers.
What is linear function?A linear function is a function that represents a straight line on the coordinate plane. The standard form of a linear function is y = mx + b.
Here, 'm' is the slope of the line, 'b' is the y-intercept of the line, 'x' is the independent variable and 'y' (or f(x)) is the dependent variable.
A) y-6=x²
Here, the highest degree is 2.
So, the equation is quadratic.
B) y=2x²+5-3x
Here, the highest degree is 2.
So, the equation is quadratic.
C) y=x
Here, the highest degree is 1.
So, the equation is linear.
D) 2y=1/2 x
Here, the highest degree is 1.
So, the equation is linear.
E) y=1/3 -5x
Here, the highest degree is 1.
So, the equation is linear.
F) y=8+x
Here, the highest degree is 1.
So, the equation is linear.
Therefore, options A and B are the correct answers.
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A cylinder has a 10-inch diameter and an 11-inch height. Find the volume of the cylinder. Round to the nearest tenth.
Answer:
V=95 in3
Step-by-step explanation:
Someone help me with this please ASAP thank you
Answer: B. 20
Step-by-step explanation: 1/5 of 25 is 5 and 5 of those are red so 25-5=20
Answer:
B
Step-by-step explanation:
20 of the cards are different colors than red because 1/5 of 25 is 5
147 is 3/2 of an original amount. What is the original amount
Answer:
98
Step-by-step explanation:
147/3=49x2=98
12467 x 1209
whats the answer
Answer:
12467 x 1209 = 15,072,603
Step-by-step explanation:
You can always use a calculator to check your answers!
If this helped, please give it brainliest!
Answer:
15072603
Step-by-step explanation:
hope this helps :)
Select the correct answer
What is the fractional form of 0.8
A 8/10
B 1/8
C 8/9
D 8/11
Answer:
8/10
Step-by-step explanation:
Ashton estimates the square root of 50 in the following way: Complete sentences √50= 2√25=2×5=10
Answer:
[tex]\sqrt{50} = \sqrt{2*5*5}= 5\sqrt{2}[/tex]
PLEASE HELP FOR 20 POINTS
Answer:
You Answer is C. 738
Step-by-step explanation:
L x W x H
A= 2 w l h l h w = 2 18 13.5 4 13.5 4 18 = 738
janet makes the conjecture that line p is also parallel to line r . What must the value of y be for her conjecture to be correct?
show your work!!! am off 75 points and brainliest answer.
Answer:
A. 6.75
Step-by-step explanation:
8x+18=4x+57
8x-4x=57-18
4x=39
4x+57=180-(8y+30)
39+57=180-8y-30
96=150-8y
8y=150-96
= 54
y= 54/8 = 6.75
HELP! PLS! it's an emergency!! I'll give brainliest!
Answer:
1. 26
2. 154
3. 26
4. 26
5. 154
6. 154
7. 26
Step-by-step explanation:
1 = 26°
2 = 154°
3 = 26°
4 = 26°
5 = 154°
6 = 154°
7 = 26°
Find an expression for the nth term (tn) in each of the following sequence: 2, 4, 6, 8, 10, ... PLEASE FAST
Answer:
2n
Step-by-step explanation:
2 x 1 = 2
2 x 2 = 4
.......
2 x 5 = 10
Find the difference between the terms. e.g 4 - 2 = 2, then times it by n for the expression
Find the second, fourth, and eleventh terms of the sequence A(n) = 5 + (n - 1)(-3)
Answer:
2nd: 2
4th: -4
11th: -25
Step-by-step explanation:
When you substitute a number into the equation you get that number term. So, if you substituted in 1, you get the first term. To find the second term, you substitute in 2:
A(2) = 5 + (2 - 1)(-3)
A(2) = 5 + (1)(-3)
A(2) = 5 - 3
A(2) = 2
To get the 4th term you substitute in 4:
A(4) = 5 + (4 - 1)(-3)
A(4) = 5 + (3)(-3)
A(4) = 5 - 9
A(4) = -4
And we do the same for the 11th term:
A(11) = 5 + (11 - 1)(-3)
A(11) = 5 + (10)(-3)
A(11) = 5 - 30
A(11) = -25
On the first play of a football game, the Titans lost 31
yards. On the second play, the Titans lost 2 yards. Then
they gained 12 yards on the third play. What was the
position of the ball relative to its starting point after the
first three plays of the game?
Answer: I never had this type of question before but try -21
Step-by-step explanation:
I assume -21 because that’s the total amount of yards lost. But I don’t know
Which equation describes the relationship
between x and y in the table?
х
-8
-4
0
4
00
y
2
1
0
-1
-2
A y= - 4x
® y=-X
© y=4x
y= 2x
Answer:
A or y = -4x
Step-by-step explanation:
2×-4=-8
1×-4=-4
0×-4=0
and so on and so forth
Type the missing number that makes these fractions equal:
?/26=8/13
Answer:
16/26=8/13
Step-by-step explanation:
Answer:
16
Step-by-step explanation:
the denominator is double of 13, using that logic multiply 8 by 2 to get 16
can anyone solve this? question on image
Answer:
Negative integers
Step-by-step explanation:
Taking a test i don’t know anything about please help
In an Economics course, the correlation between the students' total score prior to the final exam and
their final exam score is r = 0.60. The pre-exam totals for all students in the course have mean 280
points and standard deviation 30 points. The final exam scores have mean 75 points and standard
deviation 8 points.
4. Find the equation of the least-squares regression line for predicting a final exam score from a
student's pre-exam total.
5.
Interpret the slope in context.
6.
Interpret the y-intercept in context.
7.
Calculate the fraction of variability, R?.
8.
Interpret R? in context.
Answer:
See below for answers and explanations
Step-by-step explanation:
Problem 4:
The line of regression is [tex]\hat y = a+bx[/tex] where:
[tex]a=\overline y-b \overline x[/tex]
[tex]b=\frac{r*s_y}{s_x}[/tex]
We are given that [tex]\overline y=75[/tex], [tex]s_y=8[/tex], [tex]\overline x=280[/tex], [tex]s_x=30[/tex], and [tex]r=0.60[/tex], therefore our slope, [tex]b[/tex], is:
[tex]b=\frac{r*s_y}{s_x}[/tex]
[tex]b=\frac{(0.60)(8)}{30}[/tex]
[tex]b=0.16[/tex]
Therefore, the slope of the regression line is 0.16, which can be used along with the values of [tex]\overline y[/tex] and [tex]\overline x[/tex] to find the constant [tex]a[/tex]:
[tex]a=\overline y-b \overline x[/tex]
[tex]a=75-(0.16)(280)[/tex]
[tex]a=30.2[/tex]
This means our final regression line is [tex]\hat y = 30.2 + 0.16x[/tex]
Problem 5:
The slope, [tex]b=0.16[/tex], means that for every 1 point earned for a student's pre-exam total, their final exam score will increase by 0.16 points for each point they earned on the pre-exam.
Problem 6:
The y-intercept (or constant), [tex]a=30.2[/tex], means that if a student's pre-exam total were 0, then they would expect to get a 30.2 on the final exam.
Problem 7:
[tex]R^{2}=(0.60)^{2}=0.36=36\%[/tex]
Problem 8:
The fraction of variability (aka. coefficient of determination), [tex]R^2[/tex], means that a certain proportion (or percentage) of the variance in the response variable can be explained by the explanatory variable. In context, this means that 36% of the variance in final exam scores can be explained by the pre-exam scores.
5/8x64= what is the answer
Answer:
40 is the answer
hope this helps
have a good day :)
Step-by-step explanation:
what is the behavior of the graph y =-x^3-5x^2-3+9 at each of its zeros
The behavior of the graph of the function y = -x^3 - 5x^2 - 3x + 9 at each of its zeros is as follows:
At x ≈ -4.919 and x ≈ -0.488, there are local minima.
At x ≈ 1.752, there is a local maximum.
Let's analyze the behavior of the graph of the function y = -x^3 - 5x^2 - 3x + 9 at each of its zeros in more detail.
To find the zeros of the function, we need to solve the equation -x^3 - 5x^2 - 3x + 9 = 0.
To simplify the calculations, let's use a numerical method like the Newton-Raphson method to approximate the zeros. We'll start with initial guesses and iteratively refine them to improve the accuracy of the solutions.
Initial guess: x_0 ≈ -5
Applying the Newton-Raphson method:
x_1 = x_0 - f(x_0) / f'(x_0)
where f(x) = -x^3 - 5x^2 - 3x + 9
f'(x) = -3x^2 - 10x - 3 (derivative of f(x))
x_1 = -5 - (-5^3 - 5(-5)^2 - 3(-5) + 9) / (-3(-5)^2 - 10(-5) - 3)
≈ -4.919
Initial guess: x_0 ≈ -1
Applying the Newton-Raphson method:
x_1 = x_0 - f(x_0) / f'(x_0)
x_1 = -1 - (-1^3 - 5(-1)^2 - 3(-1) + 9) / (-3(-1)^2 - 10(-1) - 3)
≈ -0.488
Initial guess: x_0 ≈ 2
Applying the Newton-Raphson method:
x_1 = x_0 - f(x_0) / f'(x_0)
x_1 = 2 - (2^3 - 5(2)^2 - 3(2) + 9) / (-3(2)^2 - 10(2) - 3)
≈ 1.752
After iterating through the Newton-Raphson method, we approximate the zeros as follows:
x ≈ -4.919
x ≈ -0.488
x ≈ 1.752
Now, let's analyze the behavior of the graph at each zero:
x ≈ -4.919:
When x is close to -4.919, y is close to zero. Since the coefficient of the leading term (-x^3) is negative, as x approaches -4.919 from the left side, the graph of the function will be decreasing. As x approaches -4.919 from the right side, the graph will be increasing. Therefore, the behavior of the graph near x ≈ -4.919 is a local minimum.
x ≈ -0.488:
When x is close to -0.488, y is close to zero. Similarly, as x approaches -0.488 from the left side, the graph will be decreasing, and as x approaches -0.488 from the right side, the graph will be increasing. Therefore, the behavior of the graph near x ≈ -0.488 is also a local minimum.
x ≈ 1.752:
When x is close to 1.752, y is close to zero. In this case, as x approaches 1.752 from the left side, the graph will be increasing, and as x approaches 1.752 from the right side, the graph will be decreasing. Therefore, the behavior of the graph near x ≈ 1.752 is a local maximum.
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hey! please help i’ll give brainliest!
Answer:
Hello! Your answer is, A) The arrow pointing to the right
Step-by-step explanation:
Hope I helped! Ask me anything if you have any questions! Brainiest plz! Hope you make an 100% and have a wonderful day! -Amelia♥
Answer:
Step-by-step explanation:
The answer is a
gcf of 6x^2 and 18x^5
The answer is 6x^2. To find this, just find the greatest factor of each question, aka the greatest "common" factor (GCF), of both since it is the greatest factor they each have in common. Hope this helps!
HELP
2/3 of the students in Lindsey's class are girls. Of the girls, 1/2 of them play a musical Instrument. What fraction of the
students play a musical Instrument? Choose the model that matches the situation.
Answer:
2/6 so the last box
Step-by-step explanation:
2/3 divided into 2 pieces equals 2/6 because thirds are two times the size as sixths.
Answer:
The last box
Step-by-step explanation:
PLEASE PLEASE HELP ME IM SO DESPERATE!!!
Answer:
838.08 in³
Step-by-step explanation:
volume of tank = (36×24×24)+(½×3.14×12²×24)
= 20,736 + 5,425.92
= 26,161.92 in³
the remaining water = 27,000 - 26,161.92
= 838.08 in³
need help on this asap actual explanation!
Answer:
Vertex means the highest or lowest coordinate in a parabola (and also absolute value)
Here we see the lowest point is (-2,0), so the vertex is (-2,0)
A standard quadratic equation is written as a(x-h)^2+k
h and k are the vertex coordinate h is x and k is y
so by finding the vertex we found that h = -2 and k = 0
so you plug it in
a(x-(-2))^2+0=y
a(x+2)^2=y
when finding a, you take a random point in the graph and plug it in and solve it
lets take (-1,1)
so its a(-1+2)^2 = 1
a(1)^2 = 1
a=1
so the equation will be 1(x+2)^2 = y or (x+2)^2=y (don't need to write the 1)
Hope that answers your question
Don't hesitate to leave a comment if you are confused about something
Step-by-step explanation: