Answer:
-2.63 ft./hour
Step-by-step explanation:
The level of the tide in a harbor changes from 813 feet to 256 feet above sea level over a period of 212 hours. What is the change in tide level per hour over this period of time?
Solution:
The initial tide level was 813 feet while the final tide level was 256 feet above sea level within a period of 212 hours.
The change in tide level per hour is the ratio of the change in tide level to the period taken. Hence:
Change in tide level per hour = (Final tide level - initial tide level) / time taken
Change in tide level per hour = (256 ft. - 813 ft.) / 212 hours
Change in tide level per hour = -2.63 ft./hour
[tex]2x - 4 = 1[/tex]
2x - 4 = 1
2x = 1 + 4
2x = 5
x = 5/2
Solve for x pls and thank you
Answer:
I think its c but we did this in precal which i failed so no guarantee
Step-by-step explanation:
Answer: B
x = 12.7
Because one is degrees and one is not.
A student club has 60 members. They want to elect two officers who will serve as the president and the vice president of the club. The club bylaws dictate that the selections be done without replacement and that the first person selected would serve as the president and the second person selected would serve as the vice president. Calculate how many different ways the selections can be made if: a) There is no restriction on who is elected and whoever is elected will accept to serve. (2 Points) b) Two members, say A and B, will accept to serve only if they are elected to serve together. (3 Points)
Answer:
3540
2
Step-by-step explanation:
Total number of members = 60
Number of members to be elected = 2
Since the order of selection matters as the first is president and second is vice president ;
Using the permutation formula :
nPr = n! ÷ (n-r)!
60P2 = 60! ÷ (60 - 2)!
60P2 = 60! ÷ 58!
60P2 = 3540
B.) 2 members A and B will accept to serve only if they are selected to serve together ;
Since only 2 members (president and vice president) are to be chosen ; Hence, only the tow of them (A and B) will be chosen, to do this ;
2P2 = 2! /(2 - 2)! = 2! / 0! = (2*1)/1 = 2
Find the length of the third side. If necessary, round to the nearest tenth.
Answer:
Len = 15
Step-by-step explanation:
base = √25²-20²
= √625-400
= √225
= 15
Helllppppppppppppppp
Answer:
4/5
Step-by-step explanation:
I THINK
Answer:
4/10 or 2/5
Step-by-step explanation:
divide 1/2 by 5
Then multiply by 4
Represent 3,4 in number line
Answer:
Please give the context of questions, as it really helps people answer your questions. thanks! n.n
I need help with this one
Answer:
3
Step-by-step explanation:
The missing digit must be less than 5
Answer:
3
Step-by-step explanation:
i believe the missing digit must be less than 5
helppp plzzzzzzzzzzzzz
Answer:
b, the answer is b
Step-by-step explanation:
i can explain later
Answer:
ans: x> -9
Step-by-step explanation:
if you multiply
-2x < 18 by -1 than inequality sign changes as
2x > -18
divide both side by 2 to free 2x to x i.e
2x/2 > (-18/2)
so
x> -9
Which best describes the domain and range of the function y = 4x"? A) The domain is all real numbers greater than or equal to zero. The range is all real numbers, B) The domain is all real numbers greater than or equal to zero. The range is all real numbers greater than or equal to zero. C) The domain is all real numbers. The range is all real numbers greater than or equal to zero D) The domain is all real numbers. The range is all real numbers.
Answer:
A≈1075.21
d Diameter
37
d
r
r
r
d
d
C
A
Using the formulas
A=
π
r
2
d=
2
r
Solving forA
A=
1
4
π
d
2
=
1
4
π
37
2
≈
1075.21009
Step-by-step explanation:
the zeroes are quadratic functions
are 6 and -4 which of these could be the functons.
A research center project involved a survey of 846 internet users. It provided a variety of statistics on internet users. (a) The sample survey showed that 94% of respondents said the internet has been a good thing for them personally. Develop a 95% confidence interval for the proportion of respondents who say the internet has been a good thing for them personally. (Round your answers to four decimal places.) 0.9239 Incorrect: Your answer is incorrect. to 0.9561 Incorrect: Your answer is incorrect. (b) The sample survey showed that 67% of internet users said the internet has generally strengthened their relationship with family and friends. Develop a 95% confidence interval for the proportion of respondents who say the internet has strengthened their relationship with family and friends. (Round your answers to four decimal places.) 0.6385 Incorrect: Your answer is incorrect. to 0.7015 Incorrect: Your answer is incorrect.
Answer:
(a) (0.9240, 0.956)
(b) (0.6383, 0.7017)
Step-by-step explanation:
The number of internet users involved in the survey, n = 846
The percentage of the respondents that said the internet has been good thing for them personally, [tex]\hat p[/tex] = 94%
(a) The confidence interval of a percentage is given as follows;
[tex]CI=\hat{p}\pm z\times \sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}[/tex]
The z-value for 95% confidence interval = 1.96
We get;
[tex]CI=0.94\pm 1.96\times \sqrt{\dfrac{0.94 \times (1-0.94)}{846}} \approx 0.94 \pm 1.6003 \times 10^{-2}[/tex]
CI = 0.9240 ≤ [tex]\hat p[/tex] ≤ 0.956 = (0.9240, 0.956)
(b) The percentage of the internet users that said the internet has directly strengthened their relationship with their families, [tex]\hat p[/tex] = 67% = 0.67
The 95% confidence interval is therefore;
[tex]CI=0.67\pm 1.96\times \sqrt{\dfrac{0.67 \times (1-0.67)}{846}} \approx 0.67 \pm 3.1686\times 10^{-2}[/tex]
From which we have;
CI = 0.6383 ≤ [tex]\hat p[/tex] ≤ 0.7017 = (0.6383, 0.7017)
please help!!!!!!!!!!!!
Answer:
I think the answer is 16 mm.
what is 55+55 fassttt!!!!!!!!!
True or false if a set of points all lie on the same plane they are called coplanar
Answer:
True
Step-by-step explanation:
Coplanar points: A group of points that lie in the same plane are coplanar. Any two or three points are always coplanar. Four or more points might or might not be coplanar. The left side of the above figure shows coplanar points A, B, C, and D.
Hope this helps
Evaluate.
-3/7 +7/8
Giver answer in fraction notation.
The numerator is_______.
The denominator is________.
Hint: the numerator isn't 25; I need this ASAP. Thank you☺️
[tex]\implies {\blue {\boxed {\boxed {\purple {\sf {Numerator\:=\:25 }}}}}}[/tex]
[tex]\implies {\blue {\boxed {\boxed {\purple {\sf {Denominator \:=\:56}}}}}}[/tex]
[tex]\large\mathfrak{{\pmb{\underline{\red{Step-by-step\:explanation}}{\red{:}}}}}[/tex]
[tex] \: \frac{ - 3}{7} + \frac{7}{8} [/tex]
Since the denominators are unequal, we find the L.C.M (lowest common multiple) for both denominators.
The L. C. M for 7 and 8 is 56.
Now,
➺[tex] \: \frac{ - 3 \times 8}{7 \times 8} + \frac{7 \times 7}{8 \times 7} [/tex]
➺[tex] \: \frac{ - 24}{56} + \frac{49}{56} [/tex]
Now that the denominators are equal, we can add them.
➺[tex] \: \frac{ - 24 + 49}{56} [/tex]
➺[tex] \: \frac{ 25}{56} [/tex]
Therefore, the numerator is [tex]\boxed{ 25 }[/tex] and the denominator is [tex]\boxed{ 56 }[/tex].
[tex]\large\mathfrak{{\pmb{\underline{\orange{Mystique35 }}{\orange{ヅ}}}}}[/tex]
this is the question I need help with
Answer:
brainllest if right
b
Step-by-step explanation:
15x-10=20 solve for x
Answer:
x=2
Step-by-step explanation:
15x-10=20
+10 to both sides
15x=30
divide both sides by 15
x=2
Answer:
x = 2
Step-by-step explanation:
15 x - 10 = 20
15 times 2 = 30
30 -10 = 20
20 = 20
So x equals 2
A triangle has sides with lengths of 11 miles, 16 miles, and 18 miles. Is it a right triangle?
Answer:
no
Step-by-step explanation:
Using the converse of Pythagoras' identity.
If the square of the longest side is equal to the sum of the squares on the other 2 sides then the triangle is right.
longest side = 18, and 18² = 324
11² + 16² = 121 + 256 = 377 ≠ 324
Then triangle is not right.
Which figure represents the image of trapezoid LMNP after a reflection across the x-axis
0 Figure A
0 Figure B
0 Figure C
0 Figure D
Answer: A
Answer:
A point has the coordinates (m, 0) and m ≠ 0.
Which reflection of the point will produce an image located at (0, –m)?
a reflection of the point across the x-axis
a reflection of the point across the y-axis
a reflection of the point across the line y = x
a reflection of the point across the line y = –x
Step-by-step explanation:
I need help with this
Answer:
Tom
Step-by-step explanation:
After you convert them to decimals 131/593 is 0.22091062394 while 2/9 is 0.22222222222
in the function f(x) = (x+2)2 -3 the minimum value occurs when x is
Answer:
x=2
Step-by-step explanation:
the minimum value of y is when x = 2.
Answer:
The minimum is at x = -2
Step-by-step explanation:
f(x) = (x+2)^2 -3
This is in vertex form
f(x) = ( x-h)^2 +k where (h,k) is the vertex
Since this is an upwards opening parabola the vertex is the minimum
f(x) = (x- -2)^2 -3
The vertex is (-2,-3)
The minimum is at x = -2
Find the slope of the line that passes through the points (0,-4) and (10,3)
Answer:
[tex]\displaystyle m = \frac{7}{10}[/tex]
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightAlgebra I
Coordinates (x, y)Slope Formula: [tex]\displaystyle m = \frac{y_2-y_1}{x_2-x_1}[/tex]Step-by-step explanation:
Step 1: Define
Identify
Point (0, -4)
Point (10, 3)
Step 2: Find slope m
Simply plug in the 2 coordinates into the slope formula to find slope m
Substitute in points [Slope Formula]: [tex]\displaystyle m = \frac{3--4}{10-0}[/tex][Fraction] Subtract: [tex]\displaystyle m = \frac{7}{10}[/tex]What is slope? Describe it and provide an real life example.
Answer:
The slope of a line is a measure of its steepness. Mathematically, slope is calculated as "rise over run" (change in y divided by change in x).
Step-by-step explanation:
Expand and simplify
(V6 + V3 )(V6 - V3)
Answer:
3
Step-by-step explanation:
[tex](\sqrt{6} + \sqrt{3} )(\sqrt{6} - \sqrt{3})[/tex]
this is in the form a^2 - b^2 = (a + b)(a - b) .S0,
[tex](\sqrt{6})^2 - (\sqrt{3})^2[/tex]
root and square gets cancel.
6 - 3
3
Consider the line y=8x - 3
Find the equation of the line that is parallel to this line and passes through the point (3, -2)
Find the equation of the line that is perpendicular to this line and passes through the point (3, -2)
Answer:
y=8x-26
y=-1/8x-13/8
Step-by-step explanation:
Y=kx+b
When the two lines are parallel,
k1=k2
k2=8 And passes through the point (3, -2)
So y+2=8(x-3)
Get the answer y=8x-26
When the two lines are perpendicular,
k1*k2=-1
K2=-1/8 And passes through the point (3,-2)
So y+2=-1/8（x-3）
Get the answer y=-1/8x-13/8
List the angles in order from the largest to the smallest.
A. 25 B. 18 C.12
A. ∠C, ∠B, ∠A
B. ∠A, ∠C, ∠B
C. ∠C, ∠A, ∠B
D. ∠A, ∠B, ∠C
Answer:
D is the answer
Step-by-step explanation:
Which expression is equivalent to -x² + 5x + 94 = 13?
A.(x + 7)(x + 12) = 13
C.(x – 12)(x – 7) = 13
b. (x - 12)(x + 7) = 3
d. -(x - 7)(x + 12) = 3
John gets 3 Dollars and 12 cents everyday by mowing lawns, but he's been noticing that every time he mows his lawns he get 0.2 more money than he did before that lawn mowing session if John mowes two lawns every day and John starts at 3 Dollars and 12 cents, in 1 week how much money will John have made?
Find the y-intercept the line on the graph. Plz I need the credit
Answer:
4
Step-by-step explanation:
The y intercept is where it crosses the y axis
It crosses the y axis at y = 4
For the question "Which binomial is a factor of 9x² – 64?
3x – 8
9x – 32
3x + 32
9x + 8
I got two different answers from the choices: (x + 8)(9x - 8).
What went wrong?
Answer:
3x-8
Step-by-step explanation:
9x²-64 is the same as
(3x)² - 8²
now we have the difference of 2 squares, a²-b² =(a -b)(a +b), where a=3x, b=8
9x²-64 = (3x-8)(3x+8)