Answer:
Step-by-step explanation:
680 - 306 = 374
374/680 = 11/20 =
55%
hi very urgent plz show work u will get 15 points if u answer correct
Answer:
180
Step-by-step explanation:
The product of two complex numbers is (always,
sometimes, never] a complex number
The product of two complex numbers is SOMETIMES a complex number.
this is because you can add 2 complex numbers and get a whole number, which is not a complex number. However, you can add 2 complex numbers and sometimes get another complex number.
May I have brainliest please? :)
A publisher reports that 55% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is actually different from the reported percentage. A random sample of 280 found that 51% of the readers owned a laptop. Make the decision to reject or fail to reject the null hypothesis at the 0.05 level.
Answer:
We fail to reject the null hypothesis, we accept H₀
Step-by-step explanation:
Population proportion p₀ = 55 % p₀ = 0,55
Sample size n = 280
Sample mean p = 51 % p = 0,51 q = 0,49
n*p and n*q are both bigger than 10 therefore we can approximate the binomial distribution to a normal distribution
Test Hypothesis
Null Hypothesis H₀ p = p₀
Alternative Hypothesis Hₐ p ≠ p₀
Significance level is α = 0,05 but we have a two-tail test then
α/2 = 0,025
z(c) = - 1,96
Computing z(s)
z(s) = ( p - p₀ ) / √(p*q)/n
z(s) = ( 0,51 - 0,55 ) / √(0,51*0,49)/280
z(s) = - 0,04 * 16,73 / 0,5
z(s) = - 1,34
Comparing
z(s) and z(c)
- 1,34 < - 1,96
| z(s) | < | z(c)|
Then z(s) is in the acceptance region, we accept H₀
14. The screen size of a television is measured along
the diagonal of the screen from one corner to
another. If a television has a length of 28 inches
and a diagonal that measures 32 inches, what is
the height of the television set to the nearest
tenth?
Answer:
15.5 inches
Step-by-step explanation:
height² = diagonal² - length²
height = √(32² - 28²) ≅ 15.5 inches
Why do non STEM majors detest taking algebraic courses at the collegiate level?
Answer:
Because they find it hard to pass in the past.
Step-by-step explanation:
Non-STEM majors detest taking algebraic courses at the collegiate level because based on their past experiences in high school, whereby they probably do not excel in algebra, numbers, or mathematical subjects in general, the thought of going through advanced numbers and equations can be overwhelming.
Nobody wants to have or at least start college with poor grades. Hence, because non-STEM students find algebraic courses hard to pass in the past, they detest taking the course that has to do with it at the college level.
75%
a)
What percentage of this grid is shaded?
9/20
b)
How many more squares need to be shaded
so that 70% of the grid is shaded?
Answer: 45/
Step-by-step explanation:
Answer:
A= 45
B= 5
Step-by-step explanation:
Answer a =45
Answer B =5
A triangle can be formed with side lengths 1 in, 3 in, and 7 in. *
True or
False
Answer:
False.... i think
Step-by-step explanation:
Write an algebraic expression to represent: three times a number minus seven.
Answer:
3•x-7
Step-by-step explanation:
I hope that helps!
how do you pay taxes loll
Step-by-step explanation:
Unless Loll has agreed to credit terms in writing, payment shall be made in advance and by cash, cashier's check, credit card, wire transfer or irrevocable letter of credit in a form acceptable to Loll. All payments due from Buyer shall be made without any set-off or deductions for any reason whatsoever.
Mark me brainliest
Select the correct answer. Which statement is true about this quadratic equation? y=2x^2 + 9x-12 a There is one complex solution b there are two complex solutions c There is one real solution d There are two real solutions
Answer:
There are 2 complex solutions
Step-by-step explanation:
Both imaginary Solutions
Please help!! 10 point available:)
Answer:
[tex]1) - 2n + 14[/tex]
[tex]2)- 5n + 30[/tex]
Step-by-step explanation:
[tex]n = a + (n - 1) \times d \\ = 12 + (n - 1) \times - 2 \\ = 12 - 2n + 2 \\ = - 2n + 14[/tex]
[tex]n = a + (n - 1) \times d \\ = 25 + (n - 1) \times - 5 \\ = 25 - 5n + 5 \\ = - 5n + 30[/tex]
Can I have the brainliest please?
Solve by moving
one number
34-79=2
Answer:
Not sure but try moving a number from 79 since you cannot switch the operation
Step-by-step explanation:
Sebastian got estimates from 7 companies for his kitchen remodel:
$27,500 $31,000 $36000 $92,000 $29,000 $30,500 and $28,500
Which measure of center best describes the data, the mean or the median?
Answer:
27.500
Step-by-step explanation:
Which expression belongs in the box?
(3 x 8) x 4= 3 x ()
8 +4
8 +3
8 X 4
8 x 3
Don
Answer:
The expression that belongs in the box is 8 x 4
Option C is correct answer.
Step-by-step explanation:
We need to find Which expression belongs in the box?
[tex](3 \times 8) \times 4= 3 \times (------)[/tex]
The property applied here is associative property of multiplication.
Associative property of multiplication states that:
[tex](a \times b)\times c = a \times (b \times c)[/tex]
So, if we apply the property to our question we have:
a = 3
b = 8
c = 4
So, the expression will become: [tex](3 \times 8) \times 4= 3 \times (8 \times 4)[/tex]
So, the expression that belongs in the box is 8 x 4
Option C is correct answer.
I need help ASAP please! Giving brainliest!!
Answer: i think b
Step-by-step explanation:
so sorry if im wrong
Keisha is having a birthday party. Her mom gave her $30 to purchase items for the party. She brought 16 party hats and 16 bags. Each party hat cost $0.70 each and each bad cost $0.35 each. How much money did Keisha have left after these purchases
PLZ PLZZZZ HELP ASAP!!!!!
Explain the error: 144x2 - 100 (12x + 10)(12x - 10) 2(6x + 5)(6x - 5)
9514 1404 393
Answer:
a factor of 2 is shown, but 4 was factored out
Step-by-step explanation:
The difference of squares is factored as ...
a² -b² = (a +b)(a -b)
Then the given difference of squares factors as ...
144x² -100 = (12x)² -10² = (12x +10)(12x -10)
Each of these factors has a factor of 2 that can be factored out:
= (2(6x +5))(2(6x -5))
= (2·2)(6x +5)(6x -5)
= 4(6x +5)(6x -5)
The first factor should be 4, not 2.
Laura graphs these equations and finds that the lines intersect at a single
point, (1.5, -1.5)
Answer:
they are the only values that makes both equations true
Step-by-step explanation:
just took the test
I will give brainiest to whoever answers correctly !!
Two right triangles will be congruent under a variety of scenarios besides HL. One of which is the following:
If the hypotenuse and an acute angle of one right triangle are equal,respectively, to the hypotenuse and an acute angle of another, then the right triangles are congruent. (Use the two triangles below, mark them up and then
decide on which congruence theorem will prove that the two are congruent (SAS, SSS, ASA, AAS or HL).
Explain why this must be true.
Answer:
Step-by-step explanation:
Both the triangles will be congruent by AAS property of congruence.
It has been given in the question,
Hypotenuse and an acute angle of both the triangles are equal.One angle of both the triangles measure 90°.Property of congruence A-A-S (Angle-Angle-Side) states,
"If two angles and a non-included side of one right triangle are equal to the corresponding angles and side of other triangle, then triangles will be congruent."
Therefore, by the property of AAS property of congruence, given right triangles will be congruent.
Learn more,
https://brainly.com/question/2869318
The valve was tested on 24 engines and the mean pressure was 5.7 pounds/square inch with a standard deviation of 1.0. A level of significance of 0.05 will be used. Assume the population distribution is approximately normal. Determine the decision rule for rejecting the null hypothesis. Round your answer to three decimal places.
Answer:
We should reject H₀ for values of | x₁| > 5,26 |x₁| > 6,12
Step-by-step explanation:
Sample mean μ₀ = 5,7
Sample size n₁ = 24
Sample standard deviation s = 1
Significance level α = 0,05 CI = 95 %
Hypothesis criteria: Valves don´t meet the specification, which means pressure could be higher or lower than nominal
Normal Distribution where n < 30 we should use a two-tail t-student test
degree of freedom df = 24 - 1 = 23
And with df = 23 and α = 0,025 we find in t-tables the value for
t(c) = - 2,0687 ( on the left tail )
Test Hypothesis:
Null Hypothesis H₀ x = μ₀
Alternative Hypothesis Hₐ x ≠ μ₀
To compute t(s)
t(s) = ( x - μ₀ ) / s/√n
t(s) = ( x - 5,7 )*4,80
t(s) = 4,80*x - 27,34
Then for values of t(s) |t(s)| > 2,0687 we have to reject H₀
If we make t(s) = t(c) we find
-2,0687 = 4,8*x - 27,34
x = ( 27,34 - 2,07 ) / 4,8 and on the other tail x = 6,12
x = 5,26
Therefore for values of 5,26 ( under ) and above 6,12 we shoud reject the Null hypothesis
I need help I will list you as brainliest
115.6, 114.52 , 15.305, 114.483 from greatest to least
Answer:
115.6, 114.52, 114.483, 15.305
Step-by-step explanation:
Answer:
115•6 114•483 114•52 15•305
Solve.
W. Altus is climbing 3000 ft to the top of a mountain. The temperature was
60°F when he started, but he expects it to drop 3.6° with each 1000 ft of
elevation gain. Find the expected temperature after each 1000-ft gain.
Answer:
The temperature at 1,000 feet will be 56.4ºF; at 2,000 feet it will be 52.8ºF; and at 3,000 feet it will be 49.2ºF.
Step-by-step explanation:
Given that W. Altus is climbing 3,000 feet to the top of a mountain, starting at a temperature of 60ºF, which decreases 3.6ºF every 1,000 feet of elevation, to determine the temperature every 1,000 feet of elevation, the following calculations must be performed:
0 feet = 60ºF
1,000 feet = 60ºF - 3.6ºF = 56.4ºF
2,000 feet = 56.4ºF - 3.6ºF = 52.8ºF
3,000 feet = 52.8ºF - 3.6ºF = 49.2ºF
Thus, the temperature at 1,000 feet will be 56.4ºF; at 2,000 feet it will be 52.8ºF; and at 3,000 feet it will be 49.2ºF.
A quality-control manager randomly selects 80 bottles of soda that were filled on March 11 to assess the calibration of the filling machine. What is the sample in the study?
Answer:
The sample is the 80 bottles that were randolmy selected on March 11.
Step-by-step explanation:
Solve the systems of equations 9x+5y=41 and x+y=9 by combining the equations
Step-by-step explanation:
multiplying the 2nd eqn by 9 we get,
9x+9y=81
then,subtracting 1st and 2nd eqn
9x+5y=41
9x+9y=81
- - -
__________
0. -4y=-40
we get y = 10
then we get x=9-y
x=9-10
x= -1
so x is -1 and y is 10
What is the inverse of the function f(x) = 4x + 8?
Answer:
h(x) = (1/4)x - 2 which is choice A
Step-by-step explanation:
Replace f(x) with y. Then swap x and y. Lastly, solve for y to get the inverse.
f(x) = 4x+8
y = 4x+8
x = 4y+8
x-8 = 4y
4y = x-8
y = (x-8)/4
y = x/4 - 8/4
y = (1/4)x - 2
h(x) = (1/4)x - 2
A bag of a certain type of sand weighs 42 pounds and has a volume of 0.5 cubic feet.
Hey sandbox has a volume of 16 cubic feet.
Approximately how many pounds of sand will it take to fill the sandbox
Answer:
32 bags
Step-by-step explanation:
0.5 × 16 = 32
hope it helps
Dr. Fisher is researching the growth of a culture of bacteria. He records the count of bacteria, y, after x hours. He wants to determine whether there is a relationship between the amount of time passed and the count of bacteria. He finds that the linear model that best fits the data is
Answer:
its B hope this helps:))
Step-by-step explanation:
Answer:
its B
Step-by-step explanation:
im smart
can anyone help me with this, I gave a picture so you can figure it out
Answer:
X=2
Step-by-step explanation:
If the smaller triangle's base is 1.5ft and the bigger triangle's base is 6ft then in order to find x you have to find how much bigger the big triangle is compared to the small triangle in order to do that you have to divide 6 by 1.5 (6÷1.5) which is 4 now you know that the bigger triangle is 4 times as big as the smaller triangle now to find X divide the 8 by 4 (since the 8 is on the same side as the X only the 8 is on the bigger triangle) which is 2
