Answer:
Step-by-step explanation:
So you can use the special formula for 30-60-90 triangle or you can use the whole Soh Cah Toa thing.
I honestly prefer trig. so a is the opposite side of the 30 deg and 12 is the hyp. This should scream sine to you since sine goes with opposite/hypotenuse.
sin(30 deg)=a/12
Multiply both sides by 12
giving a=12 sin(30)
Type into calculator unless you know your unit circle well.
a=6
Answer:
a = 6
Step-by-step explanation:
Since the triangle is right use the sine ratio to find a
sin30° = [tex]\frac{opposite}{hypotenuse}[/tex] = [tex]\frac{a}{12}[/tex]
Multiply both sides by 12
12 × sin30° = a, hence
a = 6
How do I find the inverse function of this equation
Answer:
y=ln(x/(1-x))
Step-by-step explanation:
y=e^x/(1+e^x)
Cross multiply
y(1+e^x)=e^x
Distribute
y+ye^x=e^x
Put anything with x on with side and everything without x on opposing side:
y=e^x-ye^x
Factor right hand side
y=(1-y)e^x
Divide both sides by (1-y)
y/(1-y)=e^x
Use natural log.
ln(y/(1-y))=x
The inverse is
y=ln(x/(1-x))
Simplify the expression below if x > 0 and y > 0
Answer:
√'xy/y
Step-by-step explanation:
1. [x*y^(1/2)] / [y * x^(1/2)]
= [x^(1/2) * y^(1/2)] / y
= (xy)^(1/2) / y
You'll get your answer as : √'xy/y
a coin is tossed two times find the probability of getting (1 . exactly one head (2.at least one head (3. at most one head
[tex]|\Omega|=2^2=4[/tex]
1.
[tex]|A|=2\\P(A)=\dfrac{2}{4}=\dfrac{1}{2}[/tex]
2.
[tex]|A|=3\\P(A)=\dfrac{3}{4}[/tex]
3.
[tex]|A|=3\\P(A)=\dfrac{3}{4}[/tex]
match the meaning of each of the following expressions
1: n+5
2: n-5
3: x+8
4: x-8
5: 8-x
6: 5-n
7: x+(5+7)
8: x+(8+2)
9: x+(8-2)
10: x+x
Solve the equation for x
Cx-4=7
Answer:
( A )
Step-by-step explanation:
To solve this problem you must apply the procedure shown below:
1. You have the following equation given above:
2. The negative four will pass as a positive four to the right member.
3. Te sum of 7 and 4 will be divided by , as following:
Answer:
Step-by-step explanation:
The given equation is :
Cx-4=7.
To solve for x we isolate the x term .
Adding 4 both sides:
Cx=7+4
Cx=11
To x term C is multiplied ,performing the opposite operation that is dividing both sides by C we have :
x=[tex]\frac{11}{C}[/tex]
Write 0.0002507 in scientific notation.
Answer:
2.507* 10^-4
Step-by-step explanation:
0.0002507
We need to have one number to the left of the decimal
We move the decimal 4 places to the right
Since we moved the decimal to the right, the exponent on the power of 10 is negative
2.507* 10^-4
6. Chris can buy an online magazine
subscription for $5.99 per month or
$65 per year. How much will he save
by paying for the whole year at once
rather than one month at a time?
Answer:
$6.88
Step-by-step explanation:
We are trying to compare two options: Buying a magazine for 12 months or for just 1 year.
To solve this, we can multiply the monthly rate by 12 because there are 12 months in a year.
5.99 x 12 = 71.88
The other option is to just pay $65 dollars for a whole year (12 months).
Comparing the two options, we see paying for the whole year is cheaper than paying for each month individually. Because of this, we can subtract $65, the cheaper option, from $71.88 to get $6.88
Chris will save $6.88 by paying for the whole year instead of purchasing for each month.
What is the solution to the system of equations?
Answer:
[tex]\large\boxed{\left(7,\ \dfrac{13}{3}\right)}[/tex]
Step-by-step explanation:
You must use the algebraic method: substitution or elimination.
I will solve a given system of equations the substitution method.
[tex]\left\{\begin{array}{ccc}y=\dfrac{1}{3}x+2&(1)\\\\y=\dfrac{4}{3}x-5&(2)\end{array}\right\qquad\text{substitute (2) to (1)}\\\\\dfrac{4}{3}x-5=\dfrac{1}{3}x+2\qquad\text{multiply both sides by 3}\\\\3\!\!\!\!\diagup^1\cdot\dfrac{4}{3\!\!\!\!\diagup_1}x-(3)(5)=3\!\!\!\!\diagup^1\cdot\dfrac{1}{3\!\!\!\!\diagup_1}x+(3)(2)\\\\4x-15=x+6\qquad\text{add 15 to both sides}\\\\4x=x+21\qquad\text{subtract x from both sides}\\\\3x=21\qquad\text{divide both sides by 3}\\\\x=7\\\\\text{put the value of x to the first equation}\\\\y=\dfrac{1}{3}\cdot7+2\\\\y=\dfrac{7}{3}+\dfrac{6}{3}\\\\y=\dfrac{13}{3}[/tex]
4x + 8y = 16
4x-8y = 0
Answer:
[2, 1]
Step-by-step explanation:
By the Elimination method, you are left with 8x = 16 because -8 and 8 are what are called Additive Inverses, meaning they result in 0⃣; x = 2, plug 2⃣ back into both equations, and you will see that y = 1, making the solution above.
What number is missing from the number pattern? 1,2,5,10,__,26,37
Answer:
17 is the missing the number
Step-by-step explanation:
Pattern: +1, +3, +5, +7, etc.
Which of the following best describe the term definition
The most appropriate description ascribed to the meaning of definition from the options given is ; A precise statement of the qualities of an idea, object or process.
Definition refers to a description which is given to a word, idea or phenomenon such that it encompasses the actual characteristics and meaning of such phenomenon. Logical meaning, assumptions or unofficial descriptions cannot be taken to be the definition of a phenomenon.Therefore, since the definition ascribed to a process or phenomenon as to be original and precise, then the most appropriate statement is the option C.
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HOW do you solve this?
What could be the side lengths of a right triangle?
A. 27, 35, 43
B. 26, 34, 42
C. 25, 33, 41
D 24, 32, 40
Answer:
you just need memorize some of the side lengths of right triangle, or you can use this formula to calculate: a^2 + b^2 = c^2
For example, you need memoreize this group of side lengths of right triangle: 3 , 4 , 5
and in your options, there is a group is same as 3, 4 , 5 but it's 8 times bigger.
The answer is:
D. 24, 32, 40
Answer:
D.
Step-by-step explanation:
In a right triangle, the sum of the squares of the two shorter sides will equal the square of the longest side.
The law to observe here is the Pythagorean theorem where;
[tex]a^2+b^2=c^2\\[/tex]
where a and b are the two shorter sides where as c is the longest side/hypothenuse
In this question the last option is correct.How?
Lets take a=24 and b=32, what is c?
You apply;
[tex]a^2+b^2=c^2\\\\24^2+32^2=c^2\\\\\\576+1024=1600\\\\c^2=1600\\\\c=\sqrt{1600} =40[/tex]
Hence option D is correct where ;
[tex]24^2+32^2=40^2[/tex]
Solve for x.
x(x+1)≤0
Write the solution using interval notation. Use the union symbol ∪ to express the solution as a union of disjoint intervals. Finite endpoints of all intervals should be integers. If there are no solutions, use the symbol ∅ for the empty set. Use the set notation {a} to represent an isolated solution a.
Answer:
x(x + 1) ≤ 0
-1 ≤ x ≤ 0
{x | x ≥ -1 and x ≤ 0}
Follow steps:
Solving the Inequality x(x+1)≤0
To solve x(x+1)≤0, we need to find values of x where the product is negative or zero. X can be split into the regions x < 0 and x > 0. As x approaches zero from either direction, x(x+1) approaches zero as well. The function is zero at the roots of the equation x(x+1) = 0, which are x = 0 and x = -1. These two roots divide the real line into three intervals: (-∞, -1), (-1, 0), and (0, ∞). Analyzing each interval:
For x in (-∞, -1), x < -1 and x+1 < 0, so the product x(x+1) is positive.
For x in (-1, 0), x is negative and x+1 is positive, so the product x(x+1) is negative.
For x in (0, ∞), both x and x+1 are positive, and thus, the product x(x+1) is positive.
The inequality is only satisfied in the interval where the product is negative or zero. Therefore, the solution is [{-1}, 0], which can be written in interval notation as (-1, 0]. This is a single continuous interval that includes the root x = 0 and excludes the root x = -1.
Finally, using interval notation, we express the solution to the inequality x(x+1)≤0 as (-1, 0].
Muli spent 3/10 of thus salary on flood and 2/3 on rent. He was left with sh. 2100.what was his salary?
Step-by-step explanation:
Let the total amount of salary be X, then
3/10X + 2/3X + amount left= his salary(X)
(9X + 20X)/ 30 + 2100 = X
29X/30 - X = -2100
(29X - 30X)/30 = -2100
by cross multiplying
-X = -2100×39
-X = -81900
divide both side by -1
X = 81900.
therefore his salary = 81900
Answer:
Muli's salary = 62,000
Step-by-step explanation:
Let Muli's salary be x.
Money spent on food = 3/10 of x = 3x/10
Money spent on rent = 2/3 of x = 2x/3
Money left with him = 2100
(3x/10) + (2x/3) + 2100 = x
x - (3x/10) - (2x/3) = 2100 ( LCM = 30)
30x/30 - 9x/30 - 20x/30 = 2100
(30x - 9x - 20x ) / 30 = 2100
x/30 = 2100
x = 2100 * 30 = 62,000
Brenda is cooking couscous. The recipe says she requires 480 grams of couscous for 4 people. How many will she need for 14?
[tex]\bf \begin{array}{ccll} grams&people\\ \cline{1-2} 480&4\\ x&14 \end{array}\implies \cfrac{480}{x}=\cfrac{4}{14}\implies \cfrac{480}{x}=\cfrac{2}{7}\implies 3360=2x \\\\\\ \cfrac{3360}{2}=x\implies 1680=x[/tex]
625 kids play sports. If there are 125 kids on each team, how many sports are there?
Answer:
5 sports
Step-by-step explanation:
To find the number of sports, take the total number of kids and divide by the number of teams
625/125 = 5
There are 5 sports
[tex]\text{Hey there!}[/tex]
[tex]\text{In order for you to find the number of sports were there, we have to divide!}[/tex]
[tex]\bullet\ \text{625 kids play sports}[/tex]
[tex]\bullet\ \text{125 kids on each team}[/tex]
[tex]\text{625 will be our numerator (or front number)}[/tex]
[tex]\text{125 will be our denominator (or back number)}[/tex]
[tex]\dfrac{625}{125}=625\div125=5[/tex]
[tex]\boxed{\boxed{\bf{Your\ answer:5}}}\checkmark[/tex]
[tex]\text{Good luck on your assignment and enjoy your day!}[/tex]
~[tex]\frak{LoveYourselfFirst:)}[/tex]
What value of b will cause the system to have an infinite number of solutions?
y = 6x – b
–3x + y = –3
Solving for b by simplifying both sides of the equation, then isolating the variable.
b = −y + 6x
----
Choosing three values for x and substitute in to find the corresponding y values.
(0,−3) , (1,0) , (2,3)
____
I hope this helps, as always. I wish you the best of luck and have a nice day, friend..
Answer:
Step-by-step explanation:
y = 6x -b
and -3x +y =-3
on simplifying equation 2 ,we have y = 3x -3
System of equation has infinite number of solution if one equation can be obtained by multiplying by suitable non zero number
if we multiply equation by 2 we get y =6x -6
Since coefficient of x and y is same therefore comparing the value of x b with constant in another equation which is 6 .
therefore b =6
20pts
Solve for x
(4(x-5))/8=9y
Answer:
x=18y+5
Step-by-step explanation:
Answer:
x = 5 + 18y
Step-by-step explanation:
Equation: [tex]\frac{4(x - 5)}{8}[/tex] = 9y
Multiply and distribute: 4x - 20 = 72y
Add: 4x = 20 + 72y
Divide: x = 5 + 18y
what is the slope of the graph shown below ?
A. 4/3
B. 1/4
C. -3
D. 4
Answer:
D. 4Step-by-step explanation:
[tex]\text{The slope}[/tex]
[tex]m=\dfrac{rise}{run}[/tex]
[tex]rise=-4\\\\run=-1[/tex]
[tex]m=\dfrac{-4}{-1}=4[/tex]
The required slope of the graph exists 4.
Slope of the graphThe graph exists in a straight line.
The line passes through the points (0, -3) and [tex]$\left(\frac{3}{4}, 0\right)$[/tex].
We know the slope of a straight line passing through the points (a, b) and (c, d) is given by
[tex]$m=\frac{d-b}{c-a} .$$[/tex]
Therefore, the slope of the given line is
[tex]$m=\frac{0-(-3)}{\frac{3}{4}-0}$$[/tex]
[tex]$&\Rightarrow m=\frac{3}{\frac{3}{4}} \\[/tex]
[tex]$&\Rightarrow m=3 \times \frac{4}{3}\end{aligned}$$[/tex]
[tex]$\Rightarrow m=4 \text {. }$$[/tex]
The required slope of the graph exists 4.
Therefore, the correct answer is option D. 4
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Whatis the value of the expression
4(x + y)
when x= 6 and y= 24?
Answer:
120
Step-by-step explanation:
Evaluate the expression by substituting the given values into it
4(6 + 24) = 4 × 30 = 120
A length on a map is 7.5 inches. The
scale is 1 inch:5 miles. What is the
actual distance?
A 1.5 miles C 12.5 miles
B 2.5 miles D 37.5 miles
Answer:
Option D 37.5 miles
Step-by-step explanation:
we know that
The scale on a map is [tex]\frac{1}{5}\frac{in}{mi}[/tex]
so
using proportion
Find the actual distance for a length on a map of 7.5 in
Let
x ----> the actual distance
[tex]\frac{1}{5}\frac{in}{mi}=\frac{7.5}{x}\frac{in}{mi}\\ \\ x=7.5*5\\ \\x=37.5\ mi[/tex]
On Election Day, the temperature was 56°F in Durkeeville. Over in Tindertown, the temperature was 48°F. What was the difference in temperature between the two places?
Answer:
The difference is 8 F
Step-by-step explanation:
The difference means subtract
56-48 = 8
The difference is 8 F
The two-way table below describes the attendance at a movie theater at various times of the day.
Which statement best describes the relationship between the two variables?
There is an association because the relative frequencies by column are different.
There is an association because the relative frequencies by column are similar.
There is no association because the relative frequencies by column are different.
There is no association because the relative frequencies by column are similar.
Answer:
There is an association because the relative frequencies by column are different.
Step-by-step explanation:
For checking the association of a two-way table we have to calculate the relative frequency of the table. Here we see that there is an association between timing and day pf watching the movie. Also here relative frequencies of both columns are similar.
True or false? Many triangular shapes can be circumscribed about a given circle
Answer:
False.
Because Only one circle can be circumscribed about a given triangle.
Final answer:
The statement that many triangular shapes can be circumscribed about a given circle is true, as an infinite number of triangles can be formed by connecting any three distinct points on the circumference of the circle.
Explanation:
The statement "Many triangular shapes can be circumscribed about a given circle" is true. By definition, a circumscribed triangle is one that surrounds a circle, touching the circle exactly at its perimeter at three points.
Given a circle, you can indeed construct infinite triangles that circumscribe the circle, as for any set of three points on the circumference of the circle, a unique triangle can be formed.
In mathematical terms, three points determine one of these curves; that is, through any three points not in a straight line on a circle's circumference, we can draw a unique triangle which will circumscribe the circle.
Since there are an infinite number of points on a circle's circumference, we can choose an infinite number of triplets of points, each producing a different circumscribed triangle.
Please help. The survey data, and question is in the picture provided.
Answer:
[tex]\frac{83}{186}[/tex]
Step-by-step explanation:
In probability, "OR" means "+" and "AND" means "*".
The total amount of people is:
32 + 54 + 78 + 112 + 96 = 372
Number of diabetic patients are 54
Number of eye patients are 112
Since we want "OR", we will add the two probabilities:
P(diabetic or eye problem) = 54/372 + 112/372 = 83/186
given that (5,4) is on the graph of f(x), found the corresponding point for the function f (x)+4
Answer:
The corresponding point is (5,8)
Step-by-step explanation:
In this problem we know that
The rule of the transformation is equal to
(x,f(x)) ------> (x,f(x)+4)
so
for the point (5,4)
x=5, f(x)=4
substitute
(5,4) ------> (5,4+4)
(5,4) ------> (5,8)
therefore
The corresponding point is (5,8)
suppose y varies directly with x. if y=7 when x=2, find y when x=3
A. 8
B. 7/6
C. 21/2
D. 6/7
If y+3y+5y=−18
y
+
3
y
+
5
y
=
−
18
, then what is the value of y
y
?
Answer:
y=-2
Step-by-step explanation:
y+3y+5y=−18
Combine like terms
9y = -18
Divide each side by 9
9y/9 = -18/9
y = -2
The equation y + 3y + 5y = -18 simplifies to 9y = -18; solving for y, we find y = -2.
Explanation:The equation presented is y + 3y + 5y = −18. To find the value of y, we first need to simplify the left-hand side of the equation by adding the similar terms together. In this equation, all terms on the left-hand side are multiples of y. Thus, y + 3y + 5y simplifies to 9y.
Our equation then becomes 9y = -18. To solve for y, we divide both sides of the equation by 9, yielding y = -2.
So, the value of y in this equation is -2.
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If p(x) = x2 + 7x + 3 is divided by x + 4, the remainder is
The following table shows the length (in days) of each of the 9 Tucker family vacations.
Based on this data, what is a reasonable estimate of the probability that the next Tucker family vacation lasts less than 3 days?
CHOOSE 1 ANSWER:
A.) 0.24
B.) 0.44
C.) 0.56
D.) 0.89
Answer:
the correct answer is C
Step-by-step explanation:
Number of favorite outcomes=5
Total Number of outcomes=9
5/9 = 0.56
The probability that the next Tucker family vacation lasts less than 333 days is about 0.560.560, point, 56.