# Trig check my work please?

89,471 results, page 74

### math

A parallelogram has an area of 8x^2 - 2x -45. The height of the parallelogram is 4x + 9. I know the formula for a parallelogram is A=bh. Please work and explain how I get the length of the base of the parallelogram. Thanks

### Physics

You are carrying a backpack across campus. What is the work done by your verticals carrying force on the backpack? Please explain...

### Geometry

The midpoint of UV is (5,-11). The coordinates of one endpoint are U(3,5). Find the coordinates of endpoint V. (please show work and explain.)

### American Government

Check my answers please 1. Which of the following describe the role of an entrepreneur in a capitalist economic system? (I need to select 2) A. Someone who combines the factors of production into a business B. Someone who decides how much regulation the economy needs C. ...

### Psychology

Individuals who use problem-focused coping will deal with a problem or stressor by: A. making changes in their behavior. B. accepting support through sympathy. C. changing their point of view concerning the stressor. D. attempting to manage their emotions. was going to choose ...

### Precalculus...repost.. The tutor didn't quite answ

Calculate the solution set. x^2+y^2+8x=-15 9x^2+25y^2=225 My work: I did elimination...multiplied -25 to the top equation and got..... -16x^2-200x-600...I then used quadratic formula ... And got -7.5 and -5..... Is -7.5 an EXTRANEOUS SOLUTION because when I plugged -7.5 in for...

### English

Could you please check these phrasal verbs i'm unsure of? thank you. 1) They are cutting off the water/gas supply tomorrow. The chairman cut him out of the discussion. 2) The light went off (out is possible?) all of a sudden. Can you switch off /put out the light, please? 3) ...

### 8th-g Science: Need help to check answer!!!

Since I will have a science test next week based on these questions but my teacher won't check all answer with the class. I don't want to make a mistake and study to an incorrect answers. Do you mind to check the answers for me so that I am able to see if I got it correct or ...

### ALG 2/Trig

A new $12,000 automobile decreases in value every year. What is it's value 7 years from now?

### trig

how can i find all the exact solutions to the equation : 2cos^2x + 3sinx = 3 the solutions have to be between [0,2pi)

### Trig.

Theta is 21 deg. The bottom side is 25, with the side opposite from twenty one being represented by x. How do you find x?

### trig

Verify the trigonometric identity: [(1–sin²x)/sin²x]–[(csc²x–1)/cos²x]= -tan²x I still can't figure this out.

### trig

find the exact value of cos(theta) if the terminal side of angle(theta) contains the point (-3,5)

### trig

I don't understand the question... (This homework question was removed due to a copyright claim submitted by k12.com.)

### Trig

Use identities to find indicated values tan (theta)= (12/5), pi <0<3pi/2 Find sin (2theta)

### trig

Use identities to find indicated values tan (theta)= (12/5), pi <0<3pi/2 Find sin (2theta)

### trig

if P(-4,1) is a point on the terminal side of angle (theta), in standard position, then what is the exact value of csc (theta)?

### trig

For the given equation, solve for all values of (theta) to the nearest tenth of a degree. 2secant(theta)+10=0

### trig

secant theta = square root of seven over two and cosecant theta is less than zero

### trig

Write the equation of the sine function with an amplitude of, a period of, a phase shift of, and a vertical shift of 10 units up.

### algebra2/trig

the length of a rectangle is 2x+4/(x^2-9) and its width is 3/(x-3). express the perimeter of the rectangle as a single fraction in simplest form.

### trig

secx=5 use a graph to solve the following equation in the interval x is greater than -pie but less than pie

### trig

Given that sin (pi/10)=(sqrt(5)-1)/4, use double-angle formulas to find an exact expression for sin(pi/5).

### trig

Given that tan B= 7/24 with B in quadrant III, find sin 2B, cos 2B, and tan 2B, using angle identities.

### trig

A third point C lies on the ground 5.4m from N the angle of depression of C from R is X degrees. Calculate to the nearest degrees the value of X.

### trig

sinx=square root of 3 over 2, cosx=1 over 2 i want to find all six trigonometric functions

### algebra-trig help asap

An isosceles triangle has a base 22 cm long and a base angle of 72 degrees. Find its perimeter.

### Math

sec(alpha) = -4(√(5))/5 find exact values at alpha for the remaining five trig functions

### trig

each wheel of a bicycle is of radius is 1.1 ft. if the wheels are making 4 revoultions per second how fast is the bicycle moving

### Trig

the sine of an angle is 0.6. the constraint is the angle lies in quadrant II. how do I figure out what x is to solve the six functions?

### Trig

Use trigonometric identities to solve the equation csc^2x -(√3+1)cotx+(√3-1)=0 in the interval [0, 2pi]

### trig

A road has a 10% grade (slope). To the nearest degree what is the angle of elevation of the road? should I use sin?

### Pre-Calc/Trig...

Write a function with the following characteristics: A vertical asymptote at x=3 A horizontal asymptote at y=2 An x-intercept at x=-5

### trig

determine a set of parametric equations to represent the line segment that begins at the point(-2,6) and ends at the point (10,-4)

### Pre-Calc/Trig...

Given a geometric sequence with a1 = 6 and r = 2/3, write an explicit formula for An, the nth term of the sequence.

### Trig

What is the period of f(x)=sin4x. I got pi/2 but on my answer list, it is not on there. a.4pi b.2pi c.pi d.1/2pi Which one would i choose?

### Math

Find the exact value of the trig expression given that sin u = -5/13 and cos v = -4/5. u and v are in the second quadrant. cos(v - u)

### Trig identities

Has a negative -5/13 Steve. If angles x and y are in the same quadrant and sin x =3/5 and cos y= -5/13 determine the value of sin (x-y)

### Math

Find the exact value of the trig function below. cos a/2 if cosa = - 31/49 (assume cos a/2 is negative)

### education

Children will generally select equipment based on: a.their prior success with the equipment. B.the size of the equipment c.the brightness and boldness of the equipment's colors d. The opportunity for challenge presented by the equipment. My answer is D. Could someone please ...

### Math

Can you please check my answers for these questions? I'm having a little trouble with my signs, because I sometimes substitute in wrong, so I get these wrong because of that, Thank you! For the following problems, use f(x) = x^2+ 3; g(x) = –3x; h(x) = 8x - 5; a. (f + h)(x...

### calculus

A Norman window has the shape of a semicircle atop a rectangle so that the diameter of the semicircle is equal to the width of the rectangle. What is the area of the largest possible Norman window with a perimeter of 33 feet? I got h=10.180619625,r=2.458141125 and Area = 59....

### chemistry

what is the molecular formula of oxide of arsenic in its gaseous state (also I need to explain how this formula came about )?? There are two arsenic oxides. One is As2O3 and the other is As2O5. How did that come about? Please clarify. I assume you have some data; previous ...

### math

Please check. (-6m^2n+3mn^2-5mn+2)+(4m^2n+2mn^2-6mn-9) Answer: -2m^2n+5mn^2-11mn-7 (2x^4-3x^2+7x)-(5x^3+2x^2-3x+5) Answer: 2x^4-5x^3-5x^2+10x-5 (a-8)(a-1) Answer: a^2-9a+8 (z+6)^2 Answer: z^2+12z+36 (5x+2y)^2 Answer: 25x^2+20xy+4y^2 Is that order okay? Does it matter? (2x-7)(...

### math

Please check. (-6m^2n+3mn^2-5mn+2)+(4m^2n+2mn^2-6mn-9) Answer: -2m^2n+5mn^2-11mn-7 (2x^4-3x^2+7x)-(5x^3+2x^2-3x+5) Answer: 2x^4-5x^3-5x^2+10x-5 (a-8)(a-1) Answer: a^2-9a+8 (z+6)^2 Answer: z^2+12z+36 (5x+2y)^2 Answer: 25x^2+20xy+4y^2 Is that order okay? Does it matter? (2x-7)(...

### calculus

is the function f(x)=x^2 increasing on decreasing at x = -1. can anyone please check my reasoning: the value of the derivative of the function at x=-1 is -2, so that means the slope of the tangent line to the graph at that is a negative value so the function is decreasing at x...

### Spanish-Please check my answer

If I say my mom is younger than my dad do I say it this way? Mi madre es menor de mi padre? or do I say Mi madre es menor? Thank you I'm really confused on this one.

### Math - check answer

Given s = 10 - 10t2 + 45t3, determine the velocity when t = 1 s. velocity in m/s = My Answer S'= 0-20t + 135t^2 S'(1) = -20+135 = 115 velocity in m/s = 115 Can you please confirm this is correct. Thanks!

### Chemistry

Can you balance this equation please? Fe2O3 + CO yeilds Fe + CO2 Fe2O3 + CO ==> Fe + CO2 Rule: balance by changing coefficients. You may not change subscripts. Look at the Fe atoms. There are 2 Fe atoms on the left and only 1 on the right; therefore, we place a 2 in front ...

### Maths - check answer

On the May 1 billing date, Mary had a balance due of $970.60 on her credit card. The transactions during the following month were: May 5 Payment $400.00 May 10 Charge: airline tickets $381.00 May 22 Charge: hotel $270.60 May 25 Charge: florist $60.20 The interest rate on the ...

### Physical Education

I have 3 questions and 3 of my answers. Each question needs 2 answers. Please review them all. Thank you. I will post 3 more questions with 3 of my answers later this day, and the answers will just be made up along the way. I changed some of my actual answers I written down, ...

### Chemistry(Please check)

an acid with the equilibrium concentration is listed below: 1) HA + H2O = H3O^+ + A- HA= 10^-1 M, H3O=10^-3M, A=10^-3M Calculate the Ka and pKa for the acid. Ka=[10^-3][10^-3] / [10^-1] = 1.00 X 10^-5 pKa = -log[1.00 X 10^-5] = -1.00 Did I do this correctly for the Ka and pKa?

### macroeconomics

Please note that we don't do students' homework for them. Once YOU have come up with a response to YOUR questions, please re-post and let us know what you think. Then someone here will be happy to critique your work. =) Use the circular flow diagram to show how much each of ...

### English

Which sentence is preferable? A. Everyone did his work quietly. B. Each person did their work quietly. C. Everyone did their work quietly. D. Everyone worked quietly. D

### Math (check answers)

please check these answers and thanks 1.C 2.B 3.B 4.A 5.C 1.select the word tha correctly completes the sentence below. To convert from a smaller unit to a larger unit,you ___ by a power of 10. A.add B.subtract C.multiply D.divide 2.A textbook weighs 3 kilograms.How many grams...

### Physics A

how much work is being done a bookshelf being pulled 5 meters at an angle of 37 degrees from the horizontal? The magnitude of the component of the force that does the work is 43 Newtons

### math

show graph how a factory can work its employess no more than 6 and and no less than 2 days per week if the work day is 6.5 hours what is the range in hours

### math

what can ido to my home work, pleas, helme. it is pass by tomorrow and I so nervos, because I didn't now., my home work is about sequences., GIVEN: 1. 3n-5 2.3(2n-1) 3.-5 over are 4.5-n sq

### Math

Problem Page Ali made $255 for 17 hours of work. At the same rate, how many hours would he have to work to make $105 ?

### English

Can you please check these sentences for me, please? Thank you very much. 1) There are other teenagers who like wearing baggy jeans. You'll listen to the test twice. 2) You are asked either to cross the correct alternative (among three) or to fill in the blanks with a suitable...

### Where are you Jasmine20, I answered your Homework

Please check your homework answer At: Name:Tanisha Subject: To:Jasmine20 I posted the answer for GURU DEFINITION. HOPE IT HELPS!!! I think jasmine20 is not on jiskha.

### Health Law

please check my answer thanks :) Sue says that her claim is based on the fundamental law of nation what does that mean(what source is Sue relying on) I think Sue is relying on the constiution

### True or False health insurance

please check my answer thanks True or False A type of insurance that was designed to meet the needs of senior citizes is called medicare I say it's true

### Math(Please check)

1) Use the cofunction identites to evaluate the expression without the aid of a calculator. cos^2 18 degrees + cos^2 72 degrees. Would I use the forumula cos(pi/2 - Q) = sin Q

### Calculus Help Please!!! Check

A curve passes through the point (0, 2) and has the property that the slope of the curve at every point P is three times the y-coordinate of P. Find an equation of the curve. dy/dp = 3y or ∫ (3/y) dy = ∫ dp or 3 ln(y) = p + c or @ (0,2) ln(2) = 0 + c or c = ln(2) 3...

### Math Check please

Suppose c is inversely proportional to the square of d. If c = 4 when d equals 3.find the constant of proportionality and write the formula for c as a function of d c= 36/d^2 use your formula to find c when d is 5. is it 100/d2 or 100/5^2? I know the formula is c=k/d^2 c = ?

### please check(Social studies)

honestly i just wanna finish this ive been on it for almost 2 weeks now because im to scared to submit please check these answers anyone please don't leave me hanging. 11. Which cause most motivated the push for Mexican independence from Spain? A. trade with the United States ...

### Science 8th grade

Please check my answer thanks Which of the folowing process is achieved through osmosis ? A. A cube of sugar didilving in coffee B. Particles of oxygen filling the lungs C. Water moving across thr cell membranne D. Transport of proteins from the endoplasmic reticulum to the ...

### Math

can you please check my answers evaluate (-5a)^2 and -5a^2 when a =5 625 for both 1-12.64=-11.64 (-14)/(-7)=2 using multiplying by 1to find an expression equvialnt to 18/19 with a denomanator of 171z?dont simplfy type a fraction one day the temperture dropped from -4 degree f ...

### Math

can you please check my answers evaluate (-5a)^2 and -5a^2 when a =5 625 for both 1-12.64=-11.64 (-14)/(-7)=2 using multiplying by 1to find an expression equvialnt to 18/19 with a denomanator of 171z?dont simplfy type a fraction one day the temperture dropped from -4 degree f ...

### Math

can you please check my answers evaluate (-5a)^2 and -5a^2 when a =5 625 for both 1-12.64=-11.64 (-14)/(-7)=2 using multiplying by 1to find an expression equvialnt to 18/19 with a denomanator of 171z?dont simplfy type a fraction one day the temperture dropped from -4 degree f ...

### Mass Communication

The act of communication is best understood as one that has social implications.Explain briefly Please note that we don't do students' homework for them. Once YOU have come up with a response to YOUR questions, please re-post and let us know what you think. Then someone here ...

### pennfoster

Mary Palm's checking account had a starting balance of $785.63. She wrote a check for $57.00 for groceries and a check for $125.00 for a car payment. Yesterday she deposited $57.25 in her checking account. What is Mary's current balance

### Science

An adequate supply of fuelwood helps to pevent disease by allowing water to be boiled to ______________ it. Please check your assigned reading and post your answer. We'll be glad to help you when we see your thoughts about this subject. help? Come on, Mack. How does boiling ...

### Health info

please check my answer :) Dr Bob treats Tommy who's DOB is 8/1/97 on June 1,2000 The statue of limitions for medical malpractice in the state is question is three years The age of adulthood is 18 in this state When can Tommy;s records be destroyed I said August 1, 2015

### Chemistry check Please

The question is: Find the following quantities the volume, in liters, of 835 g SO3 at STP My answer is: 1 mol of SO3=80g 835g/80g = 10.44 mols v = (10.44 x 8.314 x 273)/100 = 236 L Can someone tell me if I did it correct. Thanks very much.

### Chemistry (Check)

Which of the following exhibits the highest boiling point? a. Ne, Ar, Kr, or Xe? Xe b. HF, HCl, HBr, or HI? HI c. CH3CH3, CH3COOH, or CH3OCH3? CH3COOH d. F2, Cl2, Br2, or I2? I2 e. NaCl, SO2, or N2? SO2 Are these right? I just went by molar mass. If these are wrong, please ...

### language arts

Could you check my answer please..thank you Which of the following sentences contain a linking verb? A. Teresa wore her favorite shoes today. B. Her shoes look really comfortable.xxx C. She put them on with striped socks. Teresa walked for hours without a complaint! thank you

### Math - Inverse Functions

Find the inverses of the following functions. y = 3(x - 1)^2, x >= 1 Work: x = 3(y - 1)^2 x = 3(y - 1)(y - 1) x = 3(y^2 - y - y + 1) x = 3y^2 - 6y + 3 And now what do I do!? Please explain and show me how to solve this inverse function! ... Thank you

### Please help :( I am so confused....

This is so confusing :( Given U = {10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}, A = {12, 14, 16, 18, 20}, and B = {11, 13, 14, 15, 18, 19, 20}. Find A′ ∩ B′. Do not skip to the answer. Show your work, finding A’, then B’ then find their intersection.

### Math

Lee has 35 dimes and quarters that total $5.00. Solve the system of equations to find how many dimes and how many quarters he has. d+q=35 0.1d+0.25q=5 Please show your work thanks

### Math

Mr.Mike wants to leave the waitress a 12% tip. Estimate the tip if he should leave if the family's bill is $32.46. Please show ALL WORK.......THANK YOU!!!!! :)

### Calculus

It took 1800 J of work to stretch a spring from its natural length of 2m to a length of 5m. Find the spring's force constant. Please help. Thanks in advance.

### Pre-Calc

Evaluate the expression without using a calculator(show work please)? (sin pi/4 cos pi/6 - sin pi/6 cos pi/4) the answer is 1/4(2-ã3)

### Algebra

Use the Quadratic equation to determine the last day that cowboy hats will be sold. cowboy hats = -0.4x^2 + 20x + 10 Please help me work through this.

### Algebra

Solve. Please show all of your work. The sum of twice a number and 4 less than the number is the same as the difference between -32 and the number. What is the number?

### Science

If on earth you weigh 420 newtons, and the gravitational pull on the moon is 1/6 of what it is on earth. What would be your weight on the moon?? Please show work Thanks!! :)

### Precalculus

Give an example of an increasing function whose domain is the interval [0,1]but whose range does not equal the interval[f(0),f(1)] please show me the work

### Math

Matt puts 3 1/2 quarts of lemonade in the pitcher. He adds another 1/2 quarts. How many pints of lemonade does he have total? PLEASE SHOW WORK! :[

### Math

Let Alpha and Beta be the zeros of the cubic polynomial x^3 + ax^2 + bx + c satisfying the relation Alpha * Beta = 0. Prove that : c^2 + ac + b + 1 = 0. Please work the complete solution.

### Math

Let Alpha and Beta be the zeros of the cubic polynomial x^3 + ax^2 + bx + c satisfying the relation Alpha * Beta = 0. Prove that : c^2 + ac + b + 1 = 0. Please work the complete solution.

### Math

Let Alpha and Beta be the zeros of the cubic polynomial x^3 + ax^2 + bx + c satisfying the relation Alpha * Beta -1 = 0. Prove that : c^2 + ac + b + 1 = 0. Please work the complete solution

### math

If unequal quantities are subtracted from equal quantities, the remainders are unequal in the opposite order. Since 25=25 and 5>3, then 20<22. If x=y and a>d, then x-a<y-d. Please show work and explain.

### algebra 2

samara solved 1/5 divided by 10 by using a related multiplication expression. Which multiplication expression did she solve? Please show work and help answer thanks

### Algebra please can you ck my work

Evaluate the given expressions (to two decimal places). log 1.69 =123 log 2^512 = .09 log 2^1 = 0 log o.o46 =1.34 Thank you

### math

15. The sum of five unequal whole numbers is 90. The second largest of these five numbers can be at most A.19 B.41 C.43 D.89 please explain and show work.

### Algebra 2

Find the equation for the parabola with the given vertex that passes through the given points. vertex (-4,2) point (-3,0) please show work!!!

### Algebra 2

simplify each expression. rationalize all denominators. assume that all variables are positive (1-sqrt(3x))/(sqrt(6x)) Please show work!!!!

### Surface Area and Volume

Hi I am confused on how to get the correct answer. The question states: What is the surface area of the sphere if the radius is 16 cm? Please show your work. Thank you!