Answer:
[tex]{ \tt{( {9x}^{2} + 8x) - ( {2x}^{2} + 3x)}} \\ = (9 - 2) {x}^{2} + (8 - 3)x \\ = { \bf{ {7x}^{2} + 5x}} \\ \\ { \underline{ \blue{ \tt{becker⚜jnr}}}}[/tex]
Answer:
7x^2 + 5x
Step-by-step explanation:
(9x^2 + 8x) - (2x^2 + 3x)
multiply the brackets
9x^2 + 8x - 2x^2 - 3x
place the like terms together and then add or subtract them
9x^2 - 2x^2 + 8x - 3x
7x^2 + 5x
The point-slope form of the equation of the line that passes through (-9, -2) and (1, 3) is y - 3 = - (x - 1). What is
the slope-intercept form of the equation for this line?
O y= }x+2
0 y= -x-4
O y= }x+5
N
X-Z
A materials engineer wants to test whether or not a certain device spends an average of more than 30 seconds soaking a component part in solution. Therefore, she goes out and takes a simple random sample of n =16 parts, and finds that the sample mean is 33.4 seconds with a sample standard deviation of s =8.0 seconds.
At α= 0.05, the Shapiro-Wilk Test for Normality has a p-value of p = 0.0667.
Suppose the engineer goes back and she selects a 17th sample unit. Using a 95% confidence level, provide the lower end point of a two-tailed interval that would be used to predict the range of values that this 17th sampled unit would be in with respect to seconds soaking a component part in solution.
Answer:
Using a 95% confidence level, the lower end point of a two-tailed interval that would be used to predict the range of values that this 17th sampled unit would be in with respect to seconds soaking a component part in solution is of 29.137 seconds.
Step-by-step explanation:
We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 16 - 1 = 15
95% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 15 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.95}{2} = 0.975[/tex]. So we have T = 2.1315
The margin of error is:
[tex]M = T\frac{s}{\sqrt{n}} = 2.1315\frac{8}{\sqrt{16}} = 4.263[/tex]
In which s is the standard deviation of the sample and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 33.4 - 4.263 = 29.137 seconds.
Using a 95% confidence level, the lower end point of a two-tailed interval that would be used to predict the range of values that this 17th sampled unit would be in with respect to seconds soaking a component part in solution is of 29.137 seconds.
Please help is for now
Answer:
[tex]2[/tex]
Step-by-step explanation:
Given:
[tex]-2(1-4x)=3x+8[/tex]
Let's distribute the parenthesis
[tex]-2+8x=3x+8[/tex]
Let's subtract [tex]-3x[/tex] from both sides
[tex]-2+5x=8[/tex]
Let's add [tex]2[/tex] to both sides
[tex]5x=10[/tex]
Now, let's divide both sides by [tex]5[/tex] to get [tex]x[/tex] alone
[tex]x=2[/tex]
Hope this is helpful
Step-by-step explanation:
How to solve your problem
−2(1−4)=3+8
-2(1-4x)=3x+8−2(1−4x)=3x+8
Solve
1)
Rearrange terms
−2(1−4)=3+8
-2({\color{#c92786}{1-4x}})=3x+8−2(1−4x)=3x+8
−2(−4+1)=3+8
-2({\color{#c92786}{-4x+1}})=3x+8−2(−4x+1)=3x+8
2)
Distribute
−2(−4+1)=3+8
{\color{#c92786}{-2(-4x+1)}}=3x+8−2(−4x+1)=3x+8
8−2=3+8
{\color{#c92786}{8x-2}}=3x+88x−2=3x+8
3)
Add
2
22
to both sides of the equation
8−2=3+8
8x-2=3x+88x−2=3x+8
8−2+2=3+8+2
8x-2+{\color{#c92786}{2}}=3x+8+{\color{#c92786}{2}}8x−2+2=3x+8+2
4)
Simplify
Add the numbers
Add the numbers
8=3+10
8x=3x+108x=3x+10
5)
Subtract
3
3x3x
from both sides of the equation
8=3+10
8x=3x+108x=3x+10
8−3=3+10−3
8x{\color{#c92786}{-3x}}=3x+10{\color{#c92786}{-3x}}8x−3x=3x+10−3x
6)
Simplify
Combine like terms
Combine like terms
5=10
5x=105x=10
7)
Divide both sides of the equation by the same term
5=10
5x=105x=10
55=105
\frac{5x}{{\color{#c92786}{5}}}=\frac{10}{{\color{#c92786}{5}}}55x=510
8)
Simplify
Cancel terms that are in both the numerator and denominator
PLEASE HELP
Does anybody remember that game people used to play as kids on the computers. When I was in 1st grade there would be this game where I placed like a number or something and then a circle or stuff would be drawn. If you know that game pls tell me.
Answer:
ABC ya?
Step-by-step explanation:
I think its in a minigame
5c + 40 + 2 and 5c + 2(2c + 1)
Answer:
5c + 42 and 9c + 2
Step-by-step explanation:
if a number has a variable next to it then it cannot be combined with a number that is alone.. Therefore there is no exact answer unless the variable has a number that you can replace it with. So basically numbers with the same number can be added together and numbers alone can be added together. If you do the math right then you should get the answer.
Hey does anyone know how to solve this need an answer quickly
can u please help me prove those
Answer:
ii
Step-by-step explanation:
A c A u B
B c A
Aç n Bc = Ac
What do you need to be explainer
BRAINIEST AND 10 POINTS
Answer:
-3.125
Step-by-step explanation:
1/8 in decimal form is .125
-3 1/8 = -3.125
What is the mean of the following numbers?
x-3a,x-2a,x-a,x,x+a
Answer:
x-a
Step-by-step explanation:
Mean=sum of data /no of data
=x-3a+x-2a+x-a+x+x+a/5
=5x-5a/5
=5(x-a)/5
=x-a
BRAINIST AND 10 POINTS
Step-by-step explanation:
12 I believe
have a great dayy
happy summee
I’ll give brainliest if you answer this right
Answer:
$16 per hour
Step-by-step explanation:
He earns $16 per hour as shown in the figure
The RAND() function in Excel returns a pseudo-random number between 0 and 1. If you enter this function into 1000 cells (i.e. enter the formula in one cell and copy it to 999 other cells), approximately how many of these cells will contain values less than or equal to 0.2?
a. A number relatively close to 1.
b. A number relatively close to 10.
c. A number relatively close to 100.
d. A number relatively close to 500.
e. A number relatively close to 1000.
Answer:
c. A number relatively close to 100.
Step-by-step explanation:
Given
[tex]Range: 0 \to 1[/tex]
[tex]N =1000[/tex] --- i.e. the cells
Required
Number of cells that contains less than or equal 0.2
Less than or equal 0.2 means that the numbers are approximately 20% of the whole distribution
So, to calculate the number (n) of these cells, we do the following computation
[tex]n = 20\% * N[/tex]
[tex]n = 20\% * 1000[/tex]
[tex]n = 200[/tex]
200 is closer to 100 than 500. Hence, (c) is correct
I need help immediately 156 1/42- 55 1/6
Answer:
100 6/7
Step-by-step explanation:
156 1/42-55 1/6
= 156 1/42 - 55 7/42
=100 36/42
=100 6/7
Answer:
100 6/7
Step-by-step explanation:
156 1/42-55 7/42
=100 36/42
=100 6/7
i dont get how to do this so i was wondering if someone could explain to me
Answer:
The are vertical angles.
Step-by-step explanation:
So as you can see in my picture i drew those lines, they are vertically opposite from each other.
Hope this helps!
Good Luck!
Please mark me bralinest if you can :)
Answer:
Vertical
Step-by-step explanation:
<AGB and <EGD are vertical angles because they are vertically opposite from each other since they were created from two lines crossing.
-You know that they aren't adjacent because they aren't next to each other and don't share a side or a vertex.
-They can't be supplementary because they don't add up to 180 degrees
-They can't be complementary because they don't make up 90 degrees
for what value of a is x-3 a factor of x^3-4x^2+ax-2a
Answer:
2x
Step-by-step explanation:
because it's2 so two ok carRy on
The value of a is 9.
What is factor?
A factor of polynomial P(x) is any polynomial which divides evenly into P(x).
How to find the solution for a polynomial?For finding the factor of a polynomial we will perform following steps:
If f(x) is any polynomial then substitute f(x) = 0.Then factorize the given polynomial by splitting the middle term. Then solve for x.According to the given question.
We have a cubic polynomial [tex]x^{3} -4x^{2} +ax -2a[/tex]
Also, x - 3a is a factor of the given polynomial.
⇒ [tex]x - 3 = 0[/tex]
⇒[tex]x = 3[/tex]
⇒ 3 is the one solution of the given cubic polynomial.
If 3 is the one solution of the cubic polynomial then it must satisfy the equation (i).
So, substitute the value of x in the given polynomial.
[tex](3)^{3} -4(3)^{2} + a (3) - 2a = 0[/tex]
⇒[tex]27 -4(3)^{2} +a(3) -2a=0[/tex]
⇒[tex]27 - 36 + 3a - 2a= 0[/tex]
⇒[tex]-9 + a = 0[/tex]
⇒ [tex]a = 9[/tex]
Therefore, the value of a is 9.
Find out more information about factor and solution of polynomial here:
https://brainly.com/question/26354419
#SPJ2
Write the equation of the line that passes through the points (1, -7) and (-6, -9).
Put your answer in fully reduced point-slope form, unless it is a vertical or horizontal
line.?
Answer:
y = 2/7 x - 51/7
Step-by-step explanation:
Equation of the line
(y-y1)/(y2-y1) = (x-x1)/(x2-x1)
(y-(-7)/(-9-(-7) = (x-1)/(-6-1)
(y+7)/-2 = (x-1)/-7
(-y-7)/2 = (-x+1)/7
-y-7 = -2/7 x + 2/7
-y = -2/7x +2/7 + 7
y = 2/7 x - 2/7 - 7
y = 2/7 x + (-2-49)/7
y = 2/7 x - 51/7
A group of three people are selected at random, what is the probability that all the three people have different birthdays.
Answer:
1:1
Step-by-step explanation:
this is because they are selected at random 3/3=1
How to write the fraction 34/100 as a decimal
1 less than the square of a number.
3 is the only number which is one less than a square...
A jar contains 6 red marbles numbered 1 to 6 and 8 blue marbles numbered 1 to 8. A marble is drawn at random from the jar. Find the probability the marble is red or odd numbered.
Answer:
[tex]P(R\ or\ odd\ Numbered)=5/7[/tex]
Step-by-step explanation:
From the question we are told that:
Number of Red Marble [tex]n_r=6[/tex]
Number of Blue Marble [tex]n_b=8[/tex]
Sample size [tex]n=n_r+n_b[/tex]
[tex]n=6+8[/tex]
[tex]n=14[/tex]
And
No of red or Odd numbered [tex]x= 6+4 = 10[/tex]
Generally the equation for probability the marble is red or odd numbered. is mathematically given by
[tex]P(R or odd Numbered)=x/n[/tex]
[tex]P(R or odd Numbered)=10/14[/tex]
[tex]P(R\ or\ odd\ Numbered)=5/7[/tex]
what is 4/7 x 13/9 I need help please
Answer:
0.825
Step-by-step explanation:
Answer:
52/63
hope this helps
have a good day :)
Step-by-step explanation:
What’s the answer and give an explanation.
Answer:
14 = x and 2.5 = y
Step-by-step explanation:
For ABCD - the top is 8 and the sides are 11. 11 minus 8 is 3. 11 plus 3 equals 14, that’s x.
For GHIJ - the bottom is 8 and both sides are 5.5. So 8 minus 5.5 is 2.5. That’s y.
Q10/ scale factor of polygon ABCD to polygon GHIJ = 11/5.5 = 2
Q11/ scale factor of polygon GHIJ to polygon ABCD = 1:2
Q12/ x = 8 × 2 = 16
y = 8 / 2 = 4
Q13/ ABCD ⇒ label x as 16, y as 4
GHIJ ⇒ label HI line to 5.5
Q14/ ratio = 46 : 23
= 2 : 1
hope this helps....
Solve for ? Round to near whole number
Answer:
? =50
Step-by-step explanation:
Since this is a right triangle, we can use trig functions
cos ? = adj/hyp
Taking the inverse cos of each side
cos^-1 (cos ?) = cos^-1( 14/22)
? =50.47880364
To the nearest degree
? =50
Medida de la base de un triángulo que tiene un area de 65 m2 y de altura 13 m
Answer:
10 metros.
Step-by-step explanation:
Para determinar la medida de la base de un triángulo que tiene un área de 65 metros cuadrados y una altura de 13 metros se debe realizar el siguiente cálculo, sabiendo que el área de un triangulo es igual a multiplicar su base por su altura, y dividir dicho resultado por 2:
(X x 13) / 2 = 65
X x 13 = 65 x 2
X = 130 / 13
X = 10
Por lo tanto, la base del triángulo es de 10 metros.
An analyst tested the null hypothesis µ ≥ 30 against the alternative hypothesis that µ < 30. The analyst reported a p-value of 0.07. For what significance level of will the null hypothesis would be rejected?
Answer:
For significance levels lower than 0.07, the null hypothesis would be rejected.
Step-by-step explanation:
Decision regarding the null hypothesis:
The decision depends on the p-value of the test.
If the p-value of the test is less than the significance level, the null hypothesis is reject.
If the p-value of the test is more than the significance level, the null hypothesis is not reject.
The analyst reported a p-value of 0.07. For what significance level of will the null hypothesis would be rejected?
From the theory above, for significance levels lower than 0.07, the null hypothesis would be rejected.
If x = 3, what is the value of x(14 - x)?
Answer:
33
Step-by-step explanation:
x(14 - x)
Step One: Substitute
3(14 - 3)
Step Two: Brackets/Parenthesis
3(11)
Step Three: Multiply
33
Answer:
33
Step-by-step explanation:
1. Subtract the numbers
(14-3)
2. Multiply the numbers
3*11= 33
Enter the value that will complete this expression for converting 72 inches to yards
Answer:
the answer is 12 inches
Step-by-step explanation:
there is 1 foot per 12 inches
or
12 inches make a foot
Use the synthetic division to find the real zeros of f(x)=2x3 +7x2+2x-3
Answer:
[tex]f(x) = {2x}^{3} + {7x}^{2} + 2x - 3 \\ f( \frac{1}{2} ) = 0 \\ f( - 3) = 0 \\ zeros \: = > 0 \: \: and \: \: - 3[/tex]
Please help image attached
A) is -4 a solution to this inequality
B) choose the correct inequality
One afternoon the water park sold 525 tickets for a total of $13,545. Child tickets cost $19 each, and adult tickets cost $40 each. How many of each kind of ticket were sold?
Answer:
c = 355 ; a = 170
Step-by-step explanation:
c = children
a = adults
c + a = 525
19c + 40a = 13545
19c + 19a = 9975
19c + 40a = 13545
-21a = - 3570
a = 170
c + 170 = 525
c = 355