Answer:
sina
Step-by-step explanation:
Using the cofunction identity
cos(90 - x) = sinx , then
cos(120 - (30 + a) )
= cos(120 - 30 - a)
= cos(90 - a)
= sina
An expression is defined as a set of numbers, variables, and mathematical operations. Using a cosine function identity cos(120° − (30° + a)) can be written as sin a.
What is an Expression?In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.
The given cosine expression can be rewritten as,
cos(120° − (30° + a))
Opening the bracket, to simplify the angle,
= cos(120° − 30° − a)
= cos(90° − a)
Since the cosine and sine angles are complementary to each other, therefore, cos(90° − x) = sin(x), thus, we can write the expression as,
= sin a
Learn more about Expression:
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PLEASE HELP IM CHECKING MY ANSWERSSS!!!
Which box plot has the most variability A,B,C,D
Ari exercises 1 5/8 hours per day. If he exercises five days a week, how many total hours does he exercise in a week?
HELPP\ PLEASE / QUICKLY !!!!!!!\
Answer:
8.125
Step-by-step explanation:
Just do 1 and 5/8 times 5
Answer:
8 1/8 hours a week
Step-by-step explanation:
I 5/8 times 5 gives me the product of 8.125. After converting that to a mixed number, you get 8 1/8.
You're welcome.
If f(x) = x2 – 3, find f (5)
Answer:
5*2 - 3
10-3
7
Step-by-step explanation:
mark me as the brainliest
En la última cena de los campamentos los monitores piensan servir dos perritos calientes para cada uno de los 35 niños las salchichas se venden en paquetes de 5 y los panecillos en paquetes de 6 ¿cuantos paquetes de salchichas y de panecillos tiene que comprar?
Answer:
is this question in Spanish
please HELPPPPPPPPPPPP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
y=1/2x-1 1/2 = Proper fraction
y=1/2x-3/2= improper fraction
y=x-2 = integer
Step-by-step explanation:
Volunteers at Sams school use some of the student councils savings for a special project.They buy 4 backpacks for $9 each and fill each backpack with paper and pens that cost $5.By how much did the student councils savings change because of this project?
Answer: The student councils savings change by $41.
Step-by-step explanation:
Number of backpacks = 4
Cost of each backpack = $9
Paper and pen costs = $5
Total spending = (Number of backpacks ) x (Cost of each backpack ) + (Cost of paper and pen)
= $ (4 x 9 +5)
= $ 41
Hence, the student councils savings change by $41.
If
[tex] \cos(330) = \frac{ \sqrt{3} }{2} [/tex]
Prove that:
[tex] \tan(165) = \sqrt{3} - 2[/tex]
Please solve this question.
Answer: see attachment
Step-by-step explanation:
Given: cos 330 = √3/2
Prove that tan (165) = √3 - 2
Step-by-step explanation:
cos330° = cos(360° - 30°) = cos(2π - 30°)
Using, cos(2π - x) = cosx, x < 90°
=> cos(2π - 30°)
=> cos(30°)
=> √3/2 , proved
(ii): tan(165°) = tan(180° - 15°) = tan(π - 15°)
Using, tan(π - x) = - tanx
=> tan(π - 15°)
=> - tan15°
=> - (-√3 + 2)
=> √3 - 2 proved
For tan15° :
Using, tan2x = 2tanx/(1 - tan²x)
tan30° = 2tan15°/(1 - tan²15°)
1/√3 = 2tan15° / (1 - tan²15°)
1 - a² = 2√3 a {a = tan15°}
Solving this we get, a = -√3±2
As a = tan15°, it can't be -ve, thus
a = tan15° = -√3 + 2
Which expression is equivalent to (3x2-6) – (5x2 - 7x+5)-(9x + 3)?
Answer:
It equals -2
Step-by-step explanation:
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Answer: THE LENGTH OF AB IS 13CM
Step-by-step explanation:
tehe lets be friendssss
Help me please !!!!!!!!!!!!!!
Answer:
-8
Step-by-step explanation:
All the other numbers like z=-3 and w=4 is all to trick you they aren't used. They put them there because it makes it harder to focus on one number and it throws you off. It's just doing the math by replacing the "x" with -1 and boom you have your answer!
Hope This Helps!!! Have a great day!!!
<3<3
CORRECT ANSWER WILL GET BRAINLIEST!!!!
Answer:B
Step-by-step explanation: Divide 88 to 11 And You Got Your Answer.
Answer: The correct answer is B. 11x = 88, Divide both sides by 11. Bianca had $8
Step-by-step explanation:
Identify the parent function.
y
LO
-5
5
-5
find the inverse of f(x)=x^3-8
Answer:
Step-by-step explanation:
help please i need help
Answer:
m=(2,0)................
Answer:
[tex]m=\frac{1}{2}[/tex]
Step-by-step explanation:
Points (0,0) and (2,1)
[tex]x_{1} =0\\x_{2} =2 \\y_{1} =0\\y_{2} =1[/tex]
[tex]m=\frac{changein (y)}{change in (x)}[/tex]
[tex]m=\frac{y_{2}-y_{1} }{x_{2}-y_{1} }[/tex]
[tex]m=\frac{{1}-(0) }{2-(0)}[/tex]
Simplify
[tex]m=\frac{1}{2}[/tex]
Horizontal and parallel lines e and f are cut by transversals c and d. All angles are described clockwise, from uppercase left. The intersection of lines d and c form angles: 1, 2, 4, 3. The intersection of lines f and c form angles 5, 6, 8, 7. The intersection of lines e and d form angles 9, 10, 12, 11. The intersection of lines f and d form angles 13, 14, 16, 15.
In the diagram, m∠3 = 120° and m∠12 = 80°. Which angle measures are correct? Check all that apply.
m∠1 = 60°
m∠13 = 80°
m∠6 = 80°
m∠5 = 60°
m∠10 = 120°
m∠ 14 = 100°
Answer:
The correct answers are A, B, D, and F
Step-by-step explanation:
I just took the test ( i hope this helps!!! )
Answer:
a, b, d, f
Step-by-step explanation:
I need help pleaseeeeee
Answer:
c
Step-by-step explanation: because if you go up 5 then move 4 left you will get to the number coresponding it c
answer THE ANSWER IS C, 0 TO 1750
Step-by-step explanation:
Someone help me please ill mark brainliest
Answer:
B?
Step-by-step explanation:
A B and C are the same
A line goes through the point (6,-2) and has a slope of
-3
What is the value of a if the point (a, 7) lies on the line?
a
Dome
Answer:
Step-by-step explanation:
eq. of line is y-(-2)=-3(x-6)
y+2=-3x+18
y=-3x+18-2
y=-3x+16
∵(a,7) lies on it.
7=-a+16
a=16-7=9
a=9
reply with anything :D
Answer:
anything :D
Step-by-step explanation:
what is the sum of zeros of the equation (m-10)(6m-1)=0. Ancwer your question as a fraction
PLSSS SOMEONE ANCWEE THISS BEGGINGG.
Answer:
The sum of zeros is [tex]\frac{61}{6}[/tex]
Step-by-step explanation:
The Rule of Zero Product
The rule of zero product states that the product of two nonzero elements is nonzero. It can be written as the following assertion:
If a.b=0, then a=0 or b=0
The equation
(m-10)(6m-1)=0
can be solved by applying the mentioned rule:
[tex]m-10=0 \ \ \Rightarrow m=10[/tex]
[tex]6m-1=0 \ \ \Rightarrow m=1/6[/tex]
The sum of both solutions is:
[tex]\displaystyle 10+\frac{1}{6}=\frac{61}{6}[/tex]
The sum of zeros is [tex]\mathbf{\frac{61}{6}}[/tex]
Hello I need help for this math homework please
Answer:
1. first option
2. second option
3. second option
Step-by-step explanation:
i dunno i did the math and used a calculator. im pretty confident with my answers so hopefully theyre right
Convert the following repeating decimal to a fraction in simplest form.
.78
Answer:
78/100
Step-by-step explanation:
Since .78 is in the hundredths place just move the decimal two places to the right then put it over 100. But idk if you mistyped this because .78 is not a repeating decimal
Answer:
6/9
Step-by-step explanation:
Change 0.7878 to a fraction.
Let n = 0.7878... Multiply both sides by 100 (by 100 when there are two repeating decimal digits)
100n = 78.7878... Subtract n from 100n.
99n = 78 Divide both sides by 99
n = 78/99 but n is 0.7878..., so
0.7878... = 78/99
Similarly with 0.66...
Let n = 0.66... Multiply both sides by 10 (by 10 when there is only one repeating digit)
10n = 6.66... Subtract n from 10n.
9n = 6 Divide both sides by 9.
n = 6/9 but n is 0.66..., so
0.66... = 6/9
Given the perimeter of a rectangle and either the length or width, find the unknown measurement using the appropriate formula.
The perimeter is 70ft . and the width is 16ft .
Answer:
Step-by-step explanation:
Givens
P = 2*L + 2*W
P = 70
w = 16
Solution
70 = 2L + 2*16
70 = 2L + 32
70-32 = 2L
38 = 2L
38/2 = 2L/2
L = 19
Which of the following expressions does not mean the same as the other three?
A.x+(-17)
B.-17 + x
C.x-17
D.x- (-17)
I need help pls!!! Eeeeeek
Answer:
first
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
Please Help Me!!!! ;)
Answer:
Value of x: 110
Step-by-step explanation:
5+5=10
120-10=110
Can somebody plz help?
Answer: 40/20
Step-by-step explanation: 8/10 x 5/2 = 40/20 or you can say 2, you got to flip the equation
Debbie Redden has a 25%-off coupon and is purchasing a
2.5 gallon can of primer sealer paint that has a regular price
of $39.99.
a. What is the markdown?
b. What is the sale price?
c. What is the sale price using the percent paid method?
Need help asap
x=4 and y= -9
2xy+15x
Answer:
12
Step-by-step explanation:
2xy+15x
Let x=4 and y= -9
2(-4)(-9) + 15(-4)
Multiply
72 -60
Subtract
12
Answer:
-12
Step-by-step explanation:
2(4)(-9)+15(4) is what it should look like.
