Answer:
x = − 4
Step-by-step explanation:
Answer:
x = -4
Step-by-step explanation:
First, add 7 to both sides:
7x - 7= 12x + 13
7x = 12x + 20
Subtract 12x from both sides:
-5x = 20
Divide each side by -5:
x = -4
So, the answer is x = -4
When is it better to use Synthetic division and when is it better to use long division?
Answer:
Step-by-step explanation:
Synthetic division is a shorthand method of dividing polynomials for the special case of dividing by a linear factor whose leading coefficient is 1.
What you can do with synthetic division you can do with regular long division .But not the opposite
What is the unit multiplier for inches and feet
Answer:
12
Step-by-step explanation:
Inches÷12=Feet
Feet·12=Inches
Find the amount of interest earned on $5,000 at 15% compounded annually for 10 years. (Round your answer to the nearest dollar.)
Answer:
$7500
Step-by-step explanation:
I=PRT
=5,000×0.15×10
One criticism of reading comprehension tests is that while they may measure reading comprehension, they also measure other factors not related to reading comprehension. A reading comprehension (RC) test on a major college entrance exam provides short English prose passages, and the examinees answer a set of multiple-choice items about the passage. To see if particular items measure something other than RC, investigators gave the RC test without the reading passages to a random sample of psychology students. The investigators reasoned that if questions were measuring knowledge or memory rather than just RC, students would answer questions at a higher rate than chance (20%, since there were 5 choices for each question).
Suppose that on one question, 30 out of 100 examinees answered the question correctly. Is this sufficient evidence that students are using more than just reading comprehension to answer this question? Test the relevant hypothesis using alpha = .05
Answer:
The p-value of the test is 0.0062 < 0.05, which means that this is sufficient evidence that students are using more than just reading comprehension to answer this question
Step-by-step explanation:
The investigators reasoned that if questions were measuring knowledge or memory rather than just RC, students would answer questions at a higher rate than chance (20%, since there were 5 choices for each question).
This means that at the null hypothesis, we test that the proportion is the probability of answering correctly by change, that is 20%. So
[tex]H_0: p = 0.2[/tex]
At the alternate hypothesis, we test that the proportion is above 20%, that is:
[tex]H_a: p > 0.2[/tex]
The test statistic is:
[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
In which X is the sample mean, [tex]\mu[/tex] is the value tested at the null hypothesis, [tex]\sigma[/tex] is the standard deviation and n is the size of the sample.
0.2 is tested at the null hypothesis:
This means that [tex]\mu = 0.2, \sigma = \sqrt{0.2*0.8} = 0.4[/tex]
Suppose that on one question, 30 out of 100 examinees answered the question correctly.
This means that [tex]n = 100, X = \frac{30}{100} = 0.3[/tex]
Test statistic:
[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
[tex]z = \frac{0.3 - 0.2}{\frac{0.4}{\sqrt{100}}}[/tex]
[tex]z = 2.5[/tex]
P-value of the test and decision:
The p-value of the test is the probability of finding a sample proportion above 0.3, which is 1 subtracted by the p-value of z = 2.5.
Looking at the z-table, z = 2.5 has a p-value of 0.9938
1 - 0.9938 = 0.0062
The p-value of the test is 0.0062 < 0.05, which means that this is sufficient evidence that students are using more than just reading comprehension to answer this question
plzzzzzzzz help for a brainly
Answer:
Obtuse because it bigger than an acute and a right angle
Answer:
obtuse angle triangle
hope it helps
stay safe healthy and happy.What is the sum of the numbers, written in scientific notation?
1.4 x 103 and 5.6 x 102
A. 1.96 x 2
B. 1.96 x 10^3
C. 1.96 x 4
D. 1.969 x 5
Answer: D) 1.969 x 5
Step-by-step explanation: Hope this help :D
if you average 10 miles per hour, how long will it take to go 8 miles
Answer:
48 minutes
Step-by-step explanation:
a. What is the lateral area?
b. The formula to find the
surface area of this solid
figure is
c. The surface area is
yd2
Answer:
b. po
Step-by-step explanation:
that have been the most part I don't know y avg be yyyy I have a panda but the black on it and I have a panda but the black on
PLEASE HELP
The Ocean Bike Tour Group thought it would be a good idea to get a souvenir T-shirt for each customer who went on their bike tour. They found a company who would sell them shirts with their logo for $5.50.
What is the dependent variable in this relationship?
Write an equation that shows how to determine the T-shirt cost (c) for any number of customers (n).
What would be the cost for 21 shirts? Write your answer as a number only.
0 points
How many shirts did the company buy if their total cost is $110? Write your answer as a number only.
0 points
Answer:
Cost of shirt
c = $5.50x
$115.5
20 t - shirts
Step-by-step explanation:
The dependent variable here is Cost of shirt
T - shirt cost , c equation of any number of customers :
The cost per shirt = $5.50
Let the number of shirts purchased = x
Hence,
c = $5.50x
The cost 21 shirts
x = 21
c = $5.50 * 21 = $115. 5
With c = $110
number of shirts, n equals
110 = 5.50x
110/ 5.5 = x
20
= 20 at shirts
Plz this is urgent someone plz plz plz plz plz worth 21 pt and brainlest
Answer:
8
Step-by-step explanation:
500/(2*(4.4*3.2+3.2*2+2*4.4)) = 8.5382513661
sin 0 =(8)/(9), tan 0 >0
find sec 0
Answer:
[tex]\displaystyle \sec(\theta)=\frac{9\sqrt{17}}{17}[/tex]
Step-by-step explanation:
We are given that:
[tex]\displaystyle \sin(\theta)=\frac{8}{9}\text{ and } \tan(\theta)>0[/tex]
And we want to find sec(θ).
First, note that both sine and tangent are positive. The only quadrant in which this can occur is QI. Hence, all trig ratios will be positive.
Also, recall that sine is the ratio of the opposite side to the hypotenuse. Using this information and the Pythagorean Theorem, we can determine the adjacent side:
[tex]a=\sqrt{9^2-8^2}=\sqrt{17}[/tex]
So, with respect to θ, the adjacent side is √(17), the opposite side is 8, and the hypotenuse is 9.
Secant is the ratio of the hypotenuse to the adjacent. Hence:
[tex]\displaystyle \sec(\theta)=\frac{9}{\sqrt{17}}=\frac{9\sqrt{17}}{17}[/tex]
Again, since θ is in QI, all trig ratios are positive.
Which are true and false?
Answer:
2 sentences above are correct
[tex]\sqrt{5}[/tex] < 5/7
15/[tex]\sqrt{10}[/tex] < 8.38
Step-by-step explanation:
Is anyone good at geometry if so can someone help me please ?
NO LINKS PLEASE
Answer: 9
Step-by-step explanation: h=2(A/a+b)=2(66.66/4.9+9.9)=9.01
Grandma decides to pay for her new granddaughter's education. She gives
her one penny on her first birthday, and doubles the gift every year. Round
to the nearest hundredth. Do not use a dollar sign, numerical values only.
What will be the total of all the gifts on the girl's 18th birthday?
Answer:
Around 0.40
Step-by-step explanation
If she doubles the gift every year, do 18x2=36, 36 rounds to 40 or 0.40.
The total of all the gifts on the girl's 18th birthday given from her grandma for this considered case is evaluated as 2621.43 dollars
What is the sum of the terms of a geometric series till nth term?Lets suppose the geometric sequence has its initial term is [tex]a[/tex], multiplication factor is r, then, its sum is given as:
[tex]S_n = \dfrac{a(r^n-1)}{r-1}[/tex]
(sum till nth term)
The sequence would look like [tex]a, ar, \cdots, ar^{n-1},\cdots[/tex]
For this case, we are specified that:
Grandma gives 1 penny on first birthday of her granddaughterGrandma increases the gift by doubling the previous birthday gift.That shows that the gift amounts each year will form a geometric sequence where a = 1, and r = 2 (as amounts are doubled).
The gift amounts would look like:
[tex]\\1, 2, 4, \cdots\\or\\1, 2\times 1, 2^2 \times 1, \cdots[/tex]
We have to find these terms' sum till 18th term(18th term is the gift of her 18th birthday).
Thus, we have: n = 18, a = 1, and r = 2.
The sum will be:
[tex]S_n = \dfrac{a(r^n-1)}{r-1} = \dfrac{1(2^{18}-1)}{2-1} = 2^{18} - 1 = 262143 \: \rm cents[/tex]
There are 100 cents in 1 dollars,
Thus, 1 cent = 0.01 dollars,
and thus, 262143 cents form 2621.43 dollars.
Thus, the total of all the gifts on the girl's 18th birthday given from her grandma for this considered case is evaluated as 2621.43 dollars
Learn more about sum of terms of geometric sequence here:
https://brainly.com/question/1607203
PLEASE HURRY
The graph of the function g(x) is a transformation of the parent
function f(x)x^2
Which equation describes the function g?
Answer:
3rd option. [tex]g(x)=x^{2} +2[/tex]
Help me I’ll make you expert !
Which of the following is the best estimate for -21/4 •7.89 + 13/3 ÷ (-4.17)
-17
-4
3
5
HELP PLZ! WILL GIVE BRAINLIEST.
The table shows the percentage of users of a data tablet who returned the product to an Internet provider within a year after purchase, after a year, and the reasons for the return.
Answer:
ur answer is correct only
Step-by-step explanation:
mark me brainlist tq
Answer:
dependent events
What digit is in the hundreds place of 39, 487?
Answer:
4
Step-by-step explanation:
Read the section "September 12 – The Battle of North Point."
''September 12 – The Battle of North Point
The British land and Ross boasts he will eat supper in Baltimore. Within two hours, Ross is fatally wounded by an American rifleman. Nevertheless, the British force the Americans to retreat.''
Which of the following words MOST closely matches the meaning of "retreat"?
A
advance
B
attack
C
surrender
D
withdraw
Answer:
D
Step-by-step explanation:
The military term most often used for retreat is withdraw. It means that some advanced position, the battle cannot be won or turned around. So you withdraw from the field.
A: advance. No you are doing the exact opposite of retreat.
B: attack. Same as A. You are leaving the field with retreat.
C: Surrender is an entirely different thing. It means that you have given up the field and are not willing to fight anymore.
D: answer
Cual es la pendiente de la recta qué pasa por los puntos (-4,-4) y (-4,-9)
Answer:
Step-by-step explanation:
(x1 = -4, y1 = -4) y ( x2 = -4, y2 = -9)
la pendiente es indefinida por que es una recta vertical
m= (y2-y1)/(x2-x1) = (-9+4)/ (-4+4) = -5/0 indefinida
Omg help me thissssss plsssss
Answer:
3.5
Step-by-step explanation:
If you multiply 3.5 for example by 2 (which is the number of gallons) you get 7 which is the cost (also a proportional relationship).
Pls help math and yet i still do not understand
Answer:
x = 65º
Step-by-step explanation:
Isoceles Triangle Theorem: If the two sides of an isoceles triangle are congruent, then angles opposite those sides are congruent.
Therefore x = 65º
Carol is making a pattern with toothpicks. The first five terms of Carol's pattern are shown.
Which expression can be used to find the number of toothpicks in Term n?
A. n +1
B. n +2
C. nt3
Ο Ο
D. 3n
E. 3n + 1
Answer:
B
Step-by-step explanation:
Let's make a table:
Term 1: 3 toothpicks
Term 2: 4 toothpicks
Term 3: 5 toothpicks
Term 4: 6 toothpicks
Term 5: 7 toothpicks
Term N = N + 2 toothpicks
What’s the inequality of N<-1
Answer:
ℎℎ ℎ
Step-by-step explanation:
ℎℎℎℎ ℎ ℎ
LUVP is an example of:
PLEASE HELP I DONT KNOW
Answer:
the answer is d circumference
PLEASE HELP!!
Determine whether y varies directly with x. If so, find the constant of variation k and write equation.
X 3, 12, 48, 192
Y 21, 84, 336, 1344
A. yes; k=7;y=7x
B. yes; k=4;y=4x
C. yes; k = 3 ; y = 3x
D. no
Answer:
the answer is B
because its always multiply by 7
Step-by-step explanation:
i want to say something some guys always sent the same link i dont understand why but be careful guys this link can be Viruses for your devices
Question 2 Solve the problem below using a graphing calculator. Estimate o points
your answer to four decimal places
X^2= 4/x + ln(x)
A 1.5874
B 1.4596
C. 1.7241
D. 1.6985
Find the volume of the cylinder.
Either enter an exact answer in terms of π or use 3.14 for π
Answer:
[tex]144\pi[/tex]
Step-by-step explanation:
Formula for the volume of a cylinder is the Base Area x Height
or
[tex]V= \pi r^{2} * h[/tex]
Plug in the values:
[tex]V = \pi(6)^2 * 4[/tex]
[tex]V = 36\pi *4 = 144\pi[/tex]