Answer:
Step-by-step explanation:
Cos 75 = Cos ( 30 + 45) {Use Cos (A + B) identity}
= Cos 30*cos 45 - Sin 30 Sin 45
[tex]= \frac{\sqrt{3}}{2}*\frac{1}{\sqrt{2}}-\frac{1}{2}*\frac{1}{\sqrt{2}}\\\\= \frac{\sqrt{3}}{2\sqrt{2}}-\frac{1}{2\sqrt{2}}\\\\=\frac{\sqrt{3}-1}{2\sqrt{2}}\\\\=\frac{(\sqrt{3}-1)*\sqrt{2}}{2\sqrt{2}*\sqrt{2}}\\\\=\frac{\sqrt{3}*\sqrt{2}-\sqrt{2}}{2*2}\\\\=\frac{\sqrt{6}-\sqrt{2}}{4}[/tex]
a certain book has 396 pages the student has already read 3/8 of the pages and now picks up the book again at time x=0 minutes write the equation that describes the total number of pages of the book read as a function of the number of minutes of further reading
Answer: https://brainly.com/question/22630516?answering=true&answeringSource=feedPublic%2FhomePage%2F1
Step-by-step explanation: I hope this helps pls mark branily
Consider the system of equations.
4x−3y=−2
2x+3y=6
Which property could be used to write the equation 6x = 4 as the first step to solving the system of equations?
Answer Options:
•Distributive Property of Equality
•Division Property of Equality
•Substitution Property of Equality
•Addition Property of Equality
Can someone help me it’s due today
Answer:
(19 2/3)(k)+14
Hope this Helps! :)
A mother is 3 times as old as her daughter.In 12 years time she will be twice as old as her daughter will be then. How old is the mother now?
Answer:
The mother will be 36.
Step-by-step explanation:
Answer:
36
Step-by-step explanation:
just multiply 12 and 3
what is the average monthly ranfall?
Solve the following question
Answer:
a. 3 13/14
Step-by-step explanation:
i hope this helps :)
solve-1/8<34 then graph it
Answer:
This isn’t really a valid equation, so I’m guessing you forgot to type something.
Step-by-step explanation:
Spoints
Aregular hexagon is dilated by a scale factor of 0.4 to create a new hexagon. The perimeter of the new hexagon is 0.4 times the perimeter of
the original hexagon
O True
False
Answer:
True.
Step-by-step explanation:
It is given that, a regular hexagon is dilated by a scale factor of 0.4 to make image.
It means, the perimeter of image is 0.4 times the perimeter of the original hexagon.
For example,
Let's take the rectangle with length of 12 and width of 4, it's perimeter is 12+12+4+4 =32
Let's find image using scale factor 0.4, we get
length =0.4(12)= 4.8
width =0.4(4)=1.6
So, perimeter of image = 4.8+4.8+1.6+1.6=12.8
If we compare the perimeters
0.4(32)=12.8.
So, it is true.
Simplify the sum. State any restrictions on the variables.
X-2/x+3 + 10x/(x^2)-9
Please show all work and don’t forget the restrictions!
The resulting expression will be [tex]\frac{x+2}{x-3}\\[/tex]
How to simplify fractional sumGiven the expression as shown in the question:
[tex]\frac{x-2}{x+3} + \frac{10x}{x^2-9}[/tex]
Find the LCM of the expression to have:
[tex]\frac{(x-2)(x-3)+10x}{(x+3)(x-3)}[/tex]
Expand the expression
[tex]\frac{(x^2 - 5x+6+10x}{(x+3)(x-3)}\\\frac {x^2 + 5x+6}{(x+3)(x-3)}\\[/tex]
Expand the expression
[tex]=\frac {x^2 + 2x + 3x +6}{(x+3)(x-3)}\\=\frac {x(x + 2) + 3(x +2)}{(x+3)(x-3)}\\=\frac{(x+2)(x+3)}{(x+3)(x-3)}\\ =\frac{x+2}{x-3}\\[/tex]
Hence the resulting expression will be [tex]\frac{x+2}{x-3}\\[/tex]
Learn more on expansion here: https://brainly.com/question/52825
HELP PLEASEEEEEE!!!!!
The equation that matches this diagram is
3(y + 200) = 3000.
What is the value of Y.
Answer: y = 800
Step-by-step explanation:
3(y + 200) = 3000
3y + 3(200) = 3000
3y + 600 = 3000
3y = 2400 [Subtract 600 from both side]
y = 800 [Divide 3 in both side to solve for y]
Please explain how you got your answer!
Answer: b =50°
Step-by-step explanation:
The angles on a straight line =180°
180° = 50°+90°+b
180°-50°-90°=b
50° = b
Answer:
Step-by-step explanation:
∠b + ∠a + 50° = 180°
∠b + ∠90 + 50° = 180°
∠b = 180° - 90° - 50° = 40°
A triangle has one angle that measures 61 degrees, one angle that measures 44 degrees, and one angle that measures 75 degrees. what kind of triangle is it?
choices
1.right triangle
2.obtuse triangle
3.acute triangle
Answer:
Acute triangle
Step-by-step explanation:
All the three angles of the triangle is less than 90, all angles are acute. So, it is acute triangle.
If any one of the three angles is 90, then it is right triangle.
If any one of the three angle is more than 90, then it is obtuse triangle.
put them in order of best to wowrst: apple juice, orange juice, grape juice
there is a correct answer, will give brainliest to correct answer
Answer:
grape juice, orange juice, then apple juice
or the obvious choice
none of them are the best because none of them are good
Answer:
[tex]1)apple \: juice \\ \: \: \: \: \: 2)orange \: juice \\ \: 3)grape \: juice[/tex]
what is the value of x in simplest radical form?
Answer:
13
Step-by-step explanation:
here's your solution
=> base = 12
=> perpendicular = 5
=> we need to find hypotenuse = ?
=> we know , h^2 = p^2 + b^2
=> h^2 = 12^2 + 5^2
=> h^2 = 144 + 25
=> h^2 = 169
=> h= √169
=> h= 13
hope it helps
1/2x13x6=?
What is this? I need help!
I need help identifying the hidden question
Answer:
Hidden question 1: How much change did Joshua get back after paying for his supplies.
Hidden question 2: How many puppies have spots?
(I hope this is what you meant by hidden questions. If you meant something like rearranging the words I am so sorry.)
pleasee help! Percents!!!
Answer:
Step-by-step explanation:
55%
Answer ASAP pls pls
Answer:
21x +11 is the answer hope this helps
what is the slope of 2x-4y=5
Answer:
1/2 or .5
Step-by-step explanation:
Hey There!
So the first step of this problem is to get y on one side and everything else on the other side
to do so we use inverse operations
so to get rid of the 2x we subtract 2x from each side
we would end up with -4y=5-2x
now want to get rid of the -4 on the y
to do so we would divide each side by -4
we would end up with
[tex]y=\frac{1}{2}x -\frac{4}{5}[/tex]
so we can conclude that the slope is 1/2 or .5
If an = a1 x 5^n-1 and a1=1
what is the value of a5?
can someone help me please!!
Answer:
55°
Step-by-step explanation:
∠KJL=180° - 125 = 55°
KL=KJ
so, ∠KJL= ∠KLJ =55°
david and jason have marbles in a ratio of 2:3. together they have a total of 35 marbles . how many marbles dose David have
Answer:
14 marble
Step-by-step explanation:
here's your solution
=> Total number of marble = 35
=> ratio of David and Jason = 2 : 3
=> let the ratio be in x
=> now, 2x + 3x = 35
=> 5x = 35
=> x = 35/5
=> x = 7
=> number of marble with David = 7*2 = 14
=> number of marble with Jason = 7*3 = 21
hope it helps
Answer:
number of marbles that David had=
[tex]35 \times \frac{2}{5} \\ 14marbles[/tex]
A town's population went from 40,000 to 50,000. What was the percent of change in the population?
50 POINT QUESTIONS WILL MARK BRAINIEST IF YOU ANSWER ALL OF THEM. QUIZ DUE IN 10 MINUTES PLEASE ANSWER!!!!
Answer:
Pljjsjshshjsjshsbsbsbbshs
Which expression represents the difference of 15 and s, increased by 4?
A. (15 + s) - 4
B. (4 + s) + 15
C. (4 - s) + 15
D. (15 - s) + 4
Of 42 cities, 5 have a lake and 29 have a river running through them what fraction of these 42 cities have a lake or river running through them
Answer: 17/21
Step-by-step explanation:
Number of cities = 42
Fraction of cities that has lake = 5/42
Fraction of cities that have rivers = 29/42
The fraction of these 42 cities that have a lake or river running through them will then be:
= 5/42 + 29/42
= 34/42
= 17/21
PLEASE HELP! 20 PTS
Choose ALL that apply for spring tides
Question 1 options:
Moon, Sun, and Earth are perpendicular
Moon, Sun, and Earth are aligned
Highest of the high tides and lowest of the low tides.
Occur twice a month
I tried A and B. and it was wrong.
Answer: The answers are B, C, and D (I took the quiz and it was right)
Answer:
B: Moon, Sun, and Earth are aligned
C: Highest of the high tides and lowest of the low tides.
D: Occur twice a month
Step-by-step explanation:
I took the test its right, trust me
I got 100
Please help. Find the value of x in the triangle shown below.
5
8
Answer:
x=+-[tex]\sqrt{89}[/tex]
Step-by-step explanation:
[tex]x^{2}[/tex]=[tex]8^{2}[/tex] + [tex]5^{2}[/tex]
[tex]x^{2}[/tex]=64+25
[tex]x^{2}[/tex]=89
x=+-[tex]\sqrt{89}[/tex]
Q3
A group of scientists collected data on 700 birds in the area. They determined that
12 out of every 35 birds were blue. Based on the results of the study, how many
birds in the population were NOT blue? (7.60. SS, RCA)
Answer: 240 birds are blue
Step-by-step explanation:
Takes 35 x 2=70 so 20 x 35 is 700 then do 12 x 20 and your answer is 240