Answer:
-2.4+3.2t
Step-by-step explanation:
[tex]-3.6-1.9t+1.2+5.1t\\\\=(-3.6+1.2)+(-1.9+5.1)t\\\\=-2.4+3.2t[/tex]
Answer:
-2.4+3.2t
Step-by-step explanation:
Khan
I need help with this question plz thx
Answer:
[tex]7x^2 - 3y + 9[/tex]
Step-by-step explanation:
Hey there!
Well to solve the given,
2y - y + 7 - 1 + 3 + 7x^2 - 4y
We need to combine like terms
[tex]2y - y + 7 - 1 + 3 + 7x^2 - 4y\\7x^2 - 3y + 9\\[/tex]
Hope this helps :)
Answer:
7x^2 - 3y + 9
Step-by-step explanation:
2y - y + 7 - 1 + 3 + 7x^2 - 4y [Combine like terms]
= (2y - y - 4y) + (7- 1 + 3) + 7x^2
= -3y + 9 + 7x^2 [Order the terms from most exponents to least]
= 7x^2 - 3y + 9
IF nominal alpha is set to .01, which of these p values would be considered criteria for rejecting the null hypothesis?
a. .002
b. .009
c. .04
d. .042
Answer:
The null hypothesis gets rejected for the p-value of 0.04 and 0.042.
Step-by-step explanation:
We are given the level of significance of [tex]\alpha[/tex] = 0.01 or 1%. And also we are provided with the different p-values.
As we know that; the decision rule for rejecting the null hypothesis is given by;
If the P-value of our test statistics is less than the level of significance, then we have sufficient evidence to reject our null hypothesis.If the P-value of our test statistics is more than the level of significance, then we have insufficient evidence to reject our null hypothesis.(i) The P-value given is 0.002.
Here, the P-value is less than the level of significance as 0.002 < 0.01, then we have sufficient evidence to reject our null hypothesis. So, the null hypothesis gets rejected.
(ii) The P-value given is 0.009.
Here, the P-value is less than the level of significance as 0.009 < 0.01, then we have sufficient evidence to reject our null hypothesis. So, the null hypothesis gets rejected.
(iii) The P-value given is 0.04.
Here, the P-value is more than the level of significance as 0.04 > 0.01, then we have insufficient evidence to reject our null hypothesis. So, the null hypothesis does not get rejected.
(iv) The P-value given is 0.042.
Here, the P-value is more than the level of significance as 0.042 > 0.01, then we have insufficient evidence to reject our null hypothesis. So, the null hypothesis does not get rejected.
(b) What is the probability that distance exceeds the mean distance by more than 2 standard deviations?
Answer:
>0.95
Step-by-step explanation:
This probably refers to a normal distribution. In a normal distribution, according to the empirical rule,
68% of observed data falls within 1 standard deviation of the mean
95% falls within 2 standard deviations of the mean
99.7% falls within 3 standard deviations of the mean
In this case, the observed data is distance and the average figure for all observed distances is the mean distance.
So, the probability that a/any distance observed exceeds the mean distance by more than 2 standard deviations is >95%
In other words, the probability is >0.95
5. Tia invests $2,500 at an interest rate of 4%, compounded quarterly. How much is the investment worth at the end of 5 years? Look at the concept summary if you forgot the formula for compound interest.
Answer:
$3050.48
Step-by-step explanation:
If 4% is compounded quarterly, that means it's 1% every quarter. since we have 5 years, that's 1.01^20, which is approx. 1.2202. We multiply this by the orignal $2500, so our investment at the end of 5 years is $3050.48 (rounded to nearest cent)
The amount of money that Tia's investment would be worth at the end of 5 years is equal to $3050.5.
Given the following data:
Principal = $2,500Interest rate = 4% = 0.04Time = 5 yearsNumber of times = 4To determine how much is the investment worth at the end of 5 years:
Mathematically, compound interest is given by the formula:
[tex]A = P(1 + \frac{r}{n})^{nt}[/tex]
Where;
A is the future value.P is the principal (starting amount).r is annual interest rate.n is the number of times the interest is compounded in a year.t is the number of years for the compound interest.Substituting the given parameters into the formula, we have;
[tex]A = 2500(1 + \frac{0.04}{4})^{4\times 5}\\\\A = 2500(1 +0.01)^{20}\\\\A = 2500(1.01)^{20}\\\\A = 2500(1.2202)[/tex]
Future value, A = $3050.5
Read more: https://brainly.com/question/22339845
the chef has eight blocks of butter. she cuts the butter into fourths. how many slices of butter does the chef have now
Answer:
32 Blocks of Butter
Explanation:
Since the chef is starting with 8, and I'm guessing they are cutting all the blocks of butter into fourths; this is a multiplication equation. 8×4=32
Answer:
[tex]\huge\boxed{32\ blocks\ of\ butter}[/tex]
Step-by-step explanation:
The chef had = 8 blocks
She cuts/ divides the blocks into fourths.
The chef has now:
=> [tex]8 / \frac{1}{4}[/tex]
=> [tex]8 * 4[/tex]
=> 32 blocks of butter
I need helpp thxxxxx
Answer: x=12
Step-by-step explanation:
5x=4x+12
move all terms containing x to the left side of the equation
subtract 4 from 5
1x=12
x=12
8y + 10=42 solve for y
Answer: y=4
Step-by-step explanation:
Step 1: Subtract 10 from both sides.
8y+10−10=42−10
8y=32
Step 2: Divide both sides by 8.
8y
8
=
32
8
y=4
Answer:
8y + 10 =42
8y = 42-10
8y = 32
8y/8 = 32/8
y = 4
Which property would allow you to use mental computation to simplify the problem 27 + 15 + 3 + 5? additive identity additive inverse commutative property of addition distributive property
Answer:
Commutative Property
Step-by-step explanation:
Additive Identity: If you add a real number to zero or add zero to a real number, then you get the same real number back.
Additive Inverse: When you add the same number but reversed sign, you get 0.
Commutative Property: a + b = b + a
Addition distributive property: a(b+ c) = ab + ac.
In this case, we use the commutative property:
27 + 15 + 3 + 5 = 27 + 3 + 15 + 5.
We know that 27 + 3 = 30 and 15 + 5 = 20, so we get 50 quickly using mental math.
Answer:
Communitive
Step-by-step explanation:
What is the value of the expression?
10+|5+2|
A. 3
B. -17
C. -3
D. 17
Answer:
17
Step-by-step explanation:
Because 10+5=15+2=17
prove that 3^2n+7 is divisible by 8
Answer:
Step-by-step explanation:
If n=1 then 32n+7=16=2(8) so true when n=1
Assume true for n=k so
8|32k+7
If n=k+1
32(k+1)+7
32k+2+7
If 32n+7 is divisble by 8 then 32n+7=8A where A∈Z, and thus 32k+2+7=8B where B∈Z
32×32k+7
32×(8A)=72A
72A=8(9A)=9B
So by induction 32n+7 is divisibe by 8 ∀n∈N
I'll give you brainliest if you answer! All I need is help with number 15!
Answer:
120 minutes
Step-by-step explanation:
The lowest number that all three trains times can evenly go into is 120. 60 is not divisible by 8, but 120 is. So is 12 and 10, so 120.
Which of the following is an integer?
O 9.1
0-6
0 -2.3
-O
Answer:
The answer is -6
Step-by-step explanation:
Need help plzzz anyone
Answer:
A) √61
Step-by-step explanation:
a²+b²=c²
(4-(-2))²+(5-0)²=c²
6²+5²=c²
36+25=c²
61=c²
c=√61
Suppose you run 5 miles from your house to a friend's house at a speed of 6 miles per hour. When the time comes to return home, you are tired and walk the same 5 miles home at 3 miles per hour. How long did you spend running to your friend's house?
Answer:
2hours and 30minutes
Step-by-step explanation:
6mph for 5 miles, would be 10 minutes per mile(in an hour because of 60). Only five were completed to itd take 50 minutes. 3mph for 5hours would take 1hr and 40 minutes because 3miles would take 1 hour which would make one mile take 20 minutes so you add the two twenties(for the last two miles) to get 40. Then u add them together. (50min+60min+40min)
Evaluate the integral. W (x2 y2) dx dy dz; W is the pyramid with top vertex at (0, 0, 1) and base vertices at (0, 0, 0), (1, 0, 0), (0, 1, 0), and (1, 1, 0)
Answer:
[tex]\mathbf{\iiint_W (x^2+y^2) \ dx \ dy \ dz = \dfrac{2}{15}}[/tex]
Step-by-step explanation:
Given that:
[tex]\iiint_W (x^2+y^2) \ dx \ dy \ dz[/tex]
where;
the top vertex = (0,0,1) and the base vertices at (0, 0, 0), (1, 0, 0), (0, 1, 0), and (1, 1, 0)
As such , the region of the bounds of the pyramid is: (0 ≤ x ≤ 1-z, 0 ≤ y ≤ 1-z, 0 ≤ z ≤ 1)
[tex]\iiint_W (x^2+y^2) \ dx \ dy \ dz = \int ^1_0 \int ^{1-z}_0 \int ^{1-z}_0 (x^2+y^2) \ dx \ dy \ dz[/tex]
[tex]\iiint_W (x^2+y^2) \ dx \ dy \ dz = \int ^1_0 \int ^{1-z}_0 ( \dfrac{(1-z)^3}{3}+ (1-z)y^2) dy \ dz[/tex]
[tex]\iiint_W (x^2+y^2) \ dx \ dy \ dz = \int ^1_0 \ dz \ ( \dfrac{(1-z)^3}{3} \ y + \dfrac {(1-z)y^3)}{3}] ^{1-x}_{0}[/tex]
[tex]\iiint_W (x^2+y^2) \ dx \ dy \ dz = \int ^1_0 \ dz \ ( \dfrac{(1-z)^4}{3}+ \dfrac{(1-z)^4}{3}) \ dz[/tex]
[tex]\iiint_W (x^2+y^2) \ dx \ dy \ dz =\dfrac{2}{3} \int^1_0 (1-z)^4 \ dz[/tex]
[tex]\iiint_W (x^2+y^2) \ dx \ dy \ dz =- \dfrac{2}{15}(1-z)^5|^1_0[/tex]
[tex]\mathbf{\iiint_W (x^2+y^2) \ dx \ dy \ dz = \dfrac{2}{15}}[/tex]
Need help I don’t understand
Answer:
58 degrees
Step-by-step explanation:
subtract 122 from 180
the ans of your above questions is 58°
Can you please help me with this I’ll give you a playlist for sure
Answer:
Option A
Step-by-step explanation:
Margot preformed a refection. A reflection is a rigid transformation.
A rigid transformation does not change the size nor the shape of the figure. Rigid transformations only change the position of the shape.
The parallel lines stay 4 centimetres apart after the transformation.
Hope this helps.
3(x2 + x + 2) +5(x-4)
Tell whether each equation is True, False, or Open. Explain. "must explain for credit"
1. 6-t=12
2. 7+(-5)=12
3. 31 - 15 = 22 + (-3)2
Can someone please help?
Answer:
I answered the 1st one on your other post
2nd: 1/8
3rd: I don't know anything about inchwe study in cm so I don't know the answer
Step-by-step explanation:
we throw a coin. it has 2 probabilities: heads or tails
each probability is 1/2
1st throw 1/2
2nd throw 1/2
3rd throw 1/2
as all these throws are independent from one another, we put × between them. so: 1/2 ×1/2 ×1/2= 1/8
I need this urgently anyone knows this?
Answer:
A/( 1+rt) = P
Step-by-step explanation:
A = P ( 1+rt)
Divide each side by ( 1+rt)
A/( 1+rt) = P ( 1+rt)/(1+rt)
A/( 1+rt) = P
Solve for x with work
Answer:
47 degrees
Step-by-step explanation:
The two angles shown are "vertical angles" and thus are equal.
Thus, 2x + 3 = x + 50
Combining like terms, we get:
x = 47 degrees
Manuel buys 7.9 pounds of strawberries. Each pound costs $3.89. Which expression gives the best estimate of the cost of the strawberries?
Answer:
x= 3.89 x 7.9
Step-by-step explanation:
x= 3.89 x 7.9
x=30.731
Answer: (8)($4)
Answer with an explanation:
What we need to know: Any number 5 or higher is automatically rounded up, any number 4 or lower is automatically round down. Also if the number is after the decimal you can say 5 or higher with a zero because it doesnt do anything to the number, so you could say .50 or higher or .40 or lower and if it has three decimal places just add another zero so it would be .500 higher or .400 lower.
So, 7.9 is rounded up to 8.0 because 9 is 5 or higher.
$3.89 is rounded up to $4.00 because .89 is higher than .50.
Now just take off the zeros from 8.0 and $4.00 to get (8)($4)
Hope this helps.
btw my hands are numb from answering all the questions I have answered today so brainliest would be appreciated. :))
Simplify. Rewrite the expression in the form 7^n7 n 7, start superscript, n, end superscript. \left(7^3\right)^{3}=(7 3 ) 3 =left parenthesis, 7, cubed, right parenthesis, cubed, equals
Step-by-step explanation:
We need to write the given expression in the form of [tex]7^n[/tex] and the expression is [tex](7^3)^3[/tex].
The property is : [tex](x^n)^m=x^{nm}[/tex]
We have, x = 7, n = m = 3
So,
[tex](7^3)^3=7^{3\times 3}\\\\=7^9[/tex]
Therefore, the value of n is 9.
Shana wants to use all 62 feet of the fencing she has to make a rectangular run for her dog. She decides to make the
length of the run 20 feet. She writes and solves the equation 21+ 2W - 62 to find the width of the run.
Which statements are true of the solution? Check all that apply.
The value of w is 10 feet.
The value of w can be zero.
The value of w cannot be a negative number.
O Substitution is used to replace the variable l with a value of 20.
The subtraction property of equality is used to isolate the term with the variable w.
Answer:The value of w cannot be a negative number, substitution is used to replace the variable L with a value of 20, the subtraction property of equality is used to isolate the term with the variable w.
Step-by-step explanation:
Answer:
C, D, and E
Step-by-step explanation:
Just checked it and got 100on edge
Lin recorded 14,-7 and 9. what was the net gain or loss?
Answer:
12345
Step-by-step explanation:
An outdoor spa (hot tub) draws 1504 watts to keep the water warm. If the utility company charges $0.14 per kilowatt-hour, how much does it cost to operate the spa for four months during the winter (24 hours per day)? Assume each month has 30 days.
Answer:
$606.41
Step-by-step explanation:
1504 W * (1 kW)/(1000 W) * 0.14 $/(kW*h) * 4 months * (30 days)/(month) * (24 hours)/day =
= $606.41
Solve the inequality. Negative 3 x + 6 greater-than negative 2
Answer:
[tex]x < 2 \frac{2}{3} [/tex]
Step-by-step explanation:
The symbol for greater than is '>'.
-3x +6 > -2
Bring constants to one side:
-3x > -6 -2
Simplify:
-3x > -8
Divide both sides by -1, change sign:
3x < 8
Divide by 3 on both sides:
[tex]x < \frac{8}{3} \\ x < 2 \frac{2}{3} [/tex]
Answer:
it is a
Step-by-step explanation:
just got it right
A new cell phone costs $85, and the sales tax is 9%. What is the amount of the sales tax?A new cell phone costs $85, and the sales tax is 9%. What is the amount of the sales tax?A new cell phone costs $85, and the sales tax is 9%. What is the amount of the sales tax?
Step-by-step explanation:
Sales tax = $7.65
Explanation:
To find the sales tax, you would find 9% of $85
$85×9÷100 (You can reduce 85 and 100 because they have a common factor of 5)
$17×9÷20 (Multiply 9×17)
153÷20 = $7.65
Answer:
7.65
Step-by-step explanation:
20. How does the graph of
g(x) = 2x + 3 differ from the
graph of f(x) = 2x?
A It is moved up 3 units.
B It is moved down 3 units.
C It is moved right 3 units.
D It is moved left 3 units.
Answer:
A. It is moved up 3 units
Step-by-step explanation:
The 3 in 2x+3 tells you that the line is moved up 3 units