prove that cos130°+cos110°+cos10°=0
Answer:
Use the formula cosC+cosD:2cos(C+D/2)cos(C-D/2) Use this in the question: 2cos(10+110/2)cos(10-110/2)+cos130=0 2cos60°cos(-50°)+cos130°=0 2×1/2.cos50+cos130=0 cos50+cos130=0 2cos(50+130/2)cos(50-130/2)=0 2cos90.cos40=0 2×0.cos40=0 0=0 H.P
Step-by-step explanation:
3 3ab - 5xy + 4ab+ 2yx
Answer:
here is ur answer....
Step-by-step explanation:
3ab + 4ab - 5xy + 2yx
=7ab ‐ 5xy + 2yx
Therefore the answer is 7ab - 5xy + 2yx
Information:
We can't add or subtract the number with different variables.
Translate this phrase into an algebraic expression.
Seven more than the product of 22 and Vanessa's savings
Use the variable v to represent Vanessa's savings.
Answer:
22
Step-by-step explanation:
The algebraic expression is 22v + 7.
What is an expression?An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.
Example: 2 + 3x + 4y = 7 is an expression.
We have,
Vanessa's savings = v
The expression that represents the phrase.
"Seven more than the product of 22 and Vanessa's savings."
= 22v + 7
Thus,
The algebraic expression is 22v + 7.
Learn more about expressions here:
https://brainly.com/question/3118662
#SPJ2
What is the sum of the exterior angles of a 10-gon figure?
Answer:
The sum of the exterior angles of a regular polygon will always equal 360 degrees.
Izabella answered 43 out of 50 questions correctly on her STAAR test. What percentage did Izabella answer correctly?
Answer:
Step-by-step explanation:
86 percent i hole this helps!
PLS HELP WILL GIVE BRAINLIEST ANSWER
Answer:
56°
Step-by-step explanation:
First, the measure of angle GHE is equal to DFH. This means that you can set 98-6x=63-x, which becomes 5x=35 so x=7. Substitute 7 for x and you'll get DFH =63-7, which is 56.
Help pls explain and how you got it
Step-by-step explanation:
just minus 100 out of the percentage
for example 20% is 100 - 20 = 80
x2 - 4x + y2 - 21 = 0 The equation in standard form is
i need help ;;
System of Equations: Perimeter
The perimeer of a rectangular dog pen is 126 feet. The pen's length, I, is 9 feet less than 3 times its width, w. What system of linear equations can be used to determine the dimensions, in feet, of the rectangular dog pen?
Answer:
Concept: Perimeter
We are told the perimeter is 126 We need to model it given that l= length and w= width [tex]126 =((l - 9)( 3 \times w))[/tex]Rate brainlistExpress 7.000,000,000 in scientific notation
Answer: 7 × 10^9
Step-by-step explanation:
10 to the 9th power is 1,000,000,000
7 x 1,000,000,000 = 7,000,000,000
Hope that helped!
Answer:
7x10*9
Step-by-step explanation:
hi can someone help i have to simplify fractions HELP please it should be easy!!!!
Answer:
18/27=2/3
6/12=1/2
20/10=2/1
10/12=5/6
2/8=1/4
15/30=1/2
8/12=2/3
6/36=1/6
15/20=3/4
30/50=3/5
21/28=3/4
15/24=5/8
Step-by-step explanation:
PLEASEEEE I WWILLL GIVE BRAINLEIST 6b. In Renton the sales tax is 9%. What is the total cost including tax on a $20 purchase?
PLEASE HELP (this is all my points I’ll mark brainlist anything please help)
Answer:
I believe that it would be A+C+S but is there more to the question?
Step-by-step explanation:
omg
Step-by-step explanation:
3 + 5a
how many terms are in the expression
divide 4,052 divided by 61
Answer:
R u that lazy to not type it in a calculator
Step-by-step explanation:
But it is 66.4262295082
Pls make me buy brainiest
please help!!! i need an answer on this
Answer:
15/30
Step-by-step explanation:
To get from 10 to 30 you have to muliply by 3.
So you do that to the 5 too.
5 * 3 = 15
I am once again asking for your help with solving this problem.
Answer:
llll, Vl, Vll
Step-by-step explanation:
Ace gained $ 176 by selling 32 meters cloth for $1496. Find his loss per meters he sold it for $1276
Answer:
Selling the total for $ 1276, Ace lost $ 1.37 for each meter.
Step-by-step explanation:
Given that Ace earned $ 176 selling 32 meters of cloth at $ 1496, to find out his loss for each meter if he sold the total for $ 1276, the following calculation must be performed:
1496 - 176 = 1320 (stock price)
1320/32 = 41.25 (price per meter)
1276/32 = 39.87
41.25 - 39.87 = 1.37
Thus, selling the total for $ 1276, Ace lost $ 1.37 for each meter.
Shea earns $8 per hour for the first 40 hours she works in a week. For any additional hours after that, she earns $12 per hour for that week. Which solution best represents the number of hours beyond the first 40 hours, h, Shea worked this week if she earned more than $380?
Answer: The answer is 5 but all of them are five but on the number line it’s going to the right with no fill in, it’s just a circle going to the right. Also it gives you a clue it says more than meaning greater than so it’s going this way > but the line is going this way 0———————-> on the number line with no black fill in.
Step-by-step explanation:
Answer:5
0—————>
Step-by-step explanation:
Please help and get points!
Answer:
D
Step-by-step explanation:
4)
The 8th grade students at two middle schools are raising money by washing cars.
Eastern School has already raised $625 and charges $4.50 per car. West School
charges $6.00 per car and has already raised $475. Which of the following equations
can be used to find c, the number of cars each school needs to wash so that the total
amount raised is the same for both schools?
A. 625c +4.5 = 475c + 6
B. 4.50 +625 = 6c +475
C. 625c +6=4750 +4.5
D. 4,5c 1475 = 6c 4625
Answer:
B is the only answer
Step-by-step explanation:
all other answers plug the amount of money (c) onto the whole amount that they've made, multplying in this manner would give a bigger number. B is the only excusable equation since plugging the (c) onto the West school would bring the total closer to the final amount.
Please help I need this to pass. Please
Answer:
Step-by-step explanation:
1. Longest side = hypontenuse shorter sides = legs
2. x=-2
3. Something in data that differs significanttly from the other data.
how are you not knnow this
2) -2, checked
3) a data point on a graph or in a set of results that is very much bigger or smaller than the next nearest data point.
i have no idea on the fist one, sorry, but hope the rest helped
!!! PLEASE PLEASE HELP ME , IVE BEEN STUCK ON THIS FOR SOO LONG. I SERIOUSLY NEED HELP.!!!
Using two or more complete sentences, describe how you can find a vector parallel to B = (-2,3) .
Answer:
To find a vector parallel to B, such vector must be a scalar multiple of B.
Step-by-step explanation:
Two non-zero vectors are parallel if they are scalar multiples of one another.
A vector parallel to B must be a scalar multiple of B.
let the vector parallel to B be A, then their scalar multiple is given as;
A = kB
A = k(-2, 3)
where;
k is scalar
Thus, to find a vector parallel to B, such vector must be a scalar multiple of B.
NEED HELP FASTT 100 points for step by step answers
Answer:
please refer to the above attachment.
2x2 + 8x - 7 = 0
How to solve
x =(8-√120)/4=2-1/2√ 30 = -0.739
Step-by-step explanation: calculator
Answer:
2 x 2 +8x -7= 0
4+8x-7=0
-3+8x=0
8x=0+3
8x/8=3/8
x=3/8
x=0.375
Step-by-step explanation:
1.Multiply 2x2 to get 4
2.Calculate the difference between 4-7
3.Move the constant to the right side
4.Divide both sides of the equation by 8
Suppose that 6 out of the 19 doctors in a small hospital are General Practitioners, 9 out of the 19 are under the age of 45, and 3 are both General Practitioners and under the age of 45. What is the probability that you are randomly assigned a General Practitioner or a doctor under the age of 45
Answer:
12/19
Step-by-step explanation:
We have these events
A = Doctors are general practitioners
B = doctors are under the age of 45
P(A) = 6/19
P(B) = 9/19
P(A n B) = 3/19
Then the probability of being assigned a general practitioner under age 45
P(AuB)
= P(A) + P(B) - P(A n B)
= 6/19 + 9/19 - 3/19
= 12/19
So 12/19 is the probability of getting a general practitioner under age 45.
Review: Key Concepts
.
The equation of a linear function in slope-intercept form is written as
y = mx + b, where mand b are real numbers, m is the
and b is the
y-intercept of the line
.
Changing the value of b moves the graph
or
Changing the value of m affects the
and whether the line
slopes up or down from left to right.
Answer:
m=slope
up or down
steepness
Step-by-step explanation:
Not really much to explain here you could've found this stuff on khan academy or math is fun to be honest lol
Answer:m =Slope
up or down
steepness
Step-by-step explanation:
Simplify {n-1-[n-1-(0 - 1)]
Anwser would be -1
Hope this helps
SOMEONE PLEASE HELP ME
Geometry
Lesson 1.1 Practice
Answer:
ok
Step-by-step explanation:
Answer:
You just need to substitute the variables. Example, problem 9; N=9 and q=10, 9×10? You got your answer.
Item 1
One February day, the low temperature in St. Paul, MN was -17°F. Over a period of three hours, the temperature rose 5 °F per hour. After three hours, what was the temperature?
°F