# MATH-157

133,902 results

### Math (URGENT)

solve for x, 0 ¡Ü x < 360 tan2x+1=0 My answers: 22.5, 157.5, 202.5, 337.5 Textbook: 67.5, 157.5, 247.5, 337.5 I don't understand. Am I wrong? Thanks for your help.

### physics

A 16.3 kg block is dragged over a rough, horizontal surface by a constant force of 157 N acting at an angle of 35 degree above the horizontal. Find the work done by the 157 N force.

### Math

Find the five-number summary of the following set of numbers. 337, 248, 157, 388, 248, 451, 271, 225, 310 First sort... 157,225,248,271,310,337,388,451. the minimum = 157 the minimum = =271 the median = (271+310)/2= 290.5 the upper quartile= can you please tell me if this ...

### Algebra

You want to buy 8 books for \$19.68 each, estimate the total cost show your work. I did 19.68 x 8 and got 157.44 then rounded the answer and got 157 am I right? Or The second time I tried I estimated 19.68 and got 20 so then I did 20 x 8 and got 160 Is this right?

### Trigonometry

Am I doing something wrong? I have to use the Law of Consines with the following numbers: a=30, b=15, c=17. I tried to find the angle a, since a is the longest side. Cos A=(15^2+17^2-30^2)/(2x17x15)=-.7568 The inverse being 139 degrees. But when I multiply 15, the measure of b...

### MATH 157

X^2 + 6 = -8x..........Isn't this quadratic?

### math

what % of \$720.00 equals \$157.00

### math 157

If P(A)= 1/2, P(B)= 1/6 and P(A and B)= 1/2, what can you say about P(A and B)? I don't understand?

### Math 157

Find the prime factorization of 33^5*39*25^12 Thanks!

### math 157

Is 3x^2=5 a linear, quadratic or exponential function? and how

### math

Find the reason for the geometric progression in which a1 = 1, n = 3, S3 = 157

### MATH 157

How many different types of semi irregular tessellations are there?

### MATH 157

When solving this linear equation, -8.3 = X + 6.1 don't I take 6.1 from both sides and get x = 2.2?

### math 157

Suppose that P(A)= x. The probability of the complementary event B is 0.7, what is the value of x. would it be 0.3

### math 157

An experiment has three possible outcomes: A, B, and C. If P(A)= P(B)and P(C)= 2P(A), what is the probability of each? Can anyone help me get started?

### Math 157

How many rectangles will fit about a point when tessellating the plane? How do you know?

### Math 157

how many polygon arrangements does a semi-regular tessellation have?

### Chemistry

Consider an ionic compound, MX2, composed of generic metal M and generic, gaseous halogen X. The enthalpy of formation of MX2 is ΔHf° = –799 kJ/mol. The enthalpy of sublimation of M is ΔHsub = 157 kJ/mol. The first and second ionization energies of M are IE1 = 785...

### MATH 157

Wouldn't you use milligrams to express the mass of a flower petal?

### Math 157

I am not sure how to do this problem Convert the units. 15 yd2 = _____ ft2

### Math 157

when a coin is tossed 4 times, 16 equally likely outcomes are possible, what are they

### MATH 157

Can anyone please tell me the number of degrees in the point angle of a {9/2} star polygon?

### MATH 157

If an 8 inch wide rectangle is to approach the golden ratio, what should its length be?

### math 157

question #1 provide an approiate response. Write the next equation in the pattern 1+1=2 1+1+2=4 1+1+2+3=7 1+1+2+3+5=12

### Math

Javier worked for 16 hours last week and was paid \$157. What was Javiers hourly wage?

### math 157

Consider the experiment involving rolling a single die once. What is P(even and Prime)? I do not know how to start this can anyone help?

### Chemistry

Consider an ionic compound, MX2, composed of generic metal M and generic, gaseous halogen X. The enthalpy of formation of MX2 is ΔHf° = –799 kJ/mol. The enthalpy of sublimation of M is ΔHsub = 157 kJ/mol. The first and second ionization energies of M are IE1 = 785...

### MATH-157

Consider the experiment of rolling a single die. Find the probability of the event described. What is the P(odd and prime)? A) 1/6 B) 1/2 C) 2/3 D) 1/3

### Math 157

What are the odds in favor of drawing a spade and a heart without replacement from an ordinary deck of 52 playing cards?

### MATH 157

Ok, I got another question: when trying to find the distance between the two points (4,3) and (9,15) & using the formula wouldn't the answer be 13?

### math 157

What are the odds in favor of drawing a spade and a heart? Would the odds be 2

### MATH 157

would it be best to have a refrigerator set at 29 degrees or 43.5 degrees celcius?

### math 157

A receipt contains 3 ingredients, In how many different orders can all the ingredients be added.

### math 157

Give the equation of the line that is perpendicular to the line y = x + 4 and passes through point (0, -1)

### MATH 157

what is the ratio of the surface areas for a pair of similar cylinders when the ratio of the heights is 1:3? i don't understand this at all!!

### MATH 157

A spherical tree ornament is to be painted in bright colors. If the ornament has a diameter of 4 cm, how much paint is needed?

### Math-Trigonometry

Use the half-angle formulas to find the exact values. Cosine 165 degrees, Sine 157 degrees 30' and tan pi/8

### math 157

How many three-symbol codes (letter, letter, number) can be made from the letters S, P, Y and one digit fro the set {0, 1, 2,...9} without repitition? What and how do I get started?

### CHM 157

calculate the lattice energy of CaO

### MTH 157

Given that P(A)=2/9 what are the odds in favor of A occuring?

### Math 157

Help please! Write an expression for the cost c, if a printer charges \$1.75 for binding, plus 5 cents for p pages for copies of a community groups annual report Thanks I have a mental block with these problems.

### statistics

A final exam in Math 157 is normally distributed and has a mean of 75 with a standard deviation of 12. If 36 students are randomly selected, find the probability that the mean of their test scores is greater than 70.

### math

For the car loan described, give the following information. A newspaper advertisement offers a \$4,500 used car for nothing down and 36 easy monthly payments of \$157.62. (a) amount to be paid

### Math 157

A ship carries exactly 10 different signal flags. If each possible combination and ordering of 4 of these flags connotes a specific message, how many signals can be sent with these flags, taken 4 at a time?

### Math

Find the linear speed in feet per minute of a seat on the Ferris wheel. v= r.w How do I find out "w"? r= 25 ft. arc= 40 ft. angle= 58° 1 revolution= 157 ft./revolution

### math\

Michael invested a certain amount of money at 3% interest and \$750 more than that amount at 5%. His total yearly interest was \$157.50. How much did he invest at each rate?

### math 157

For the data in the following table, select a type of display and describe the steps that you would take in developing it to show the relationship between age and s/1000 people from car s: Age 1–14 15–24 25–44 45–64 65– Death 4.6 6.2 16.6 8.8 15.

### math 157

three cards are drawn without replacement from an ordinary deck of 52 playing cards. What is the pronanility that the third card is a spade if the first two cards were not spades? How do I even start this?

### math 157

Assume that a researcher randomly selects 14 newborn babies and counts the number of girls selected, x. The probabilities corresponding to the 14 possible values of x are summarized in the given table. Answer the question using the table.

### MATH MS. SUE

1. On a recent day, one U.S. dollar was worth 1.09 euros. If you were to exchange 157 euros on that day, how many U.S. dollars would you have received? A. \$110.09 B. \$144.04 C. \$155.91 D. \$171.13

### MATH 157

I am looking everywhere.....in my notes and in my chapter. What would the other endpoint of a line segment with the given midpoint and one endpoint? ENDPOINT (0,0) MIDPOINT (2, -8)

### Chemistry

Hi, I posted a question yesterday : A compound contains only carbon, hydrogen, nitrogen, and oxygen. Combustion of 0.157 of the compound produced 0.213g CO2 and 0.0310 g H20. In another experiment, it is found that 0.103g of the compound produces 0.0230 g NH3. What is the ...

### Math-157

A class elects two officers, a president and a secretary/ treasurer, from its 12 members. How many different ways can these two offices be filled from the members of the class?

### math

A number made up of the digits 4,5,and 6 is subtracted from a number made up of the digits of 0,2,8. The difference ia 157. Write out the entire problem?

### Math 157

Copy each equation in Exercises 31–33. Replace the boldface italic letter with a number that shows the relationship indicated in the table. Then copy each table and complete it by using the corresponding equation. 32. y = -x + b x y 1 0 2 -1 8 -7 10 ? 20 ? 40 ?

### Physics

Carbon dioxide forms into a solid (dry ice) at approximately -157°F. What temperature in degrees Celsius does this correspond to?

### math 157

If a single letter is drawn from the set {m, a, t, h}, what is the probability that the letter drawn is a member of the set {m, a, t, h, e, i, c, s}? would it be 4/8 which then equals to 1/2

### statistics

The following gives the height of 100 men in centimeters. 153 162 168 154 151 168 162 153 161 167 157 154 165 156 163 165 160 171 170 173 164 158 163 155 167 162 168 153 161 166 163 162 163 163 163 164 165 163 162 162 163 161 162 162 158 162 167 158 169 168 168 156 160 158 169...

### Biology & Math

Using the following data calculate the number of neutrophils per ml. Total WBC count: 6.3 x 10^6/ml Total cells counted: 157 Neutrophils counted: 53 If possible could you show how to work it out to, thanks :)

### Math

An adult crocodile weighs up to 2200 lbs. If a young crocodile weighs 157 lbs, how many pounds might it be expected to gain in it's lifetime? How do you write a word sentence that describes the inequality situation?

### Math 157

assume that a reseacher randomly selected 14 new born babies and counts the number of girls selected x. the probability corresponding to the 14 possible values of x. find the probability of selecting exactly 8 girls.

### Math

issan deposited 2500 into a savings account that pays 4.5% simple interest per year. How much interest does she earn per year? A-1225.00 B-472.50** C-157.50 D-4725.00 I think its C

### math 157

The following are prices (in dollars) 2004 automobiles, as listed in a sale ad in the automobile section of the newspaper: 12,997 14,891 18,666 21,799 17,495 17,266 21,517 14,414 14,257 15,634 15,734 27,825 28,015 19,514 14,182 19,135 19,555 12,333 7,700 9,898

### Math 157

The game of dots is played by rolling a fair die and receiving \$1 for each dot showing on the top face of the die. What cost should be set for each roll if the game is to be considered a fair game?

### geometry

if each angle in a regular polygon is 157.5 degrees, how many sides does the polygon have?

### mth 157

Drawing one slip, what is P (slip contains a vowel)?

### Astronomy

In the equation 4pi^2/G/p^2 times a^3, what is the value of 4pi^2? Is it 39.47? or 157.913

### Chem 1510

A urine sample has a mass of 157 g and a density of 1.030 g/mL. What is the volume of this sample?

### Chem 1510

A urine sample has a mass of 157 g and a density of 1.030 g/mL. What is the volume of this sample?

### Chem 1510

A urine sample has a mass of 157 g and a density of 1.030 g/mL. What is the volume of this sample?

### Math 157

five numbers are to be picked, without repetition from 44 numbers to determine the winner of the fortune five game in the state lottery. If the order of the numbers is insignificant how many different ways can a winning quintuple be seleted? what is the probability of winning?

### MATH 157

List the elements in the sample space of this experiment: a 6 sided die is rolled. the sides contain the numbers 1,2,3,4,5,6. list the sample space of rolling one die.

### Math 157

A group of 10 students consists of 3 girls and 7 boys. How many ways can the students be arranged from left to right if the first 3 students are girls and the remaining students are all boys?

### Math

john has 28 marbles and sue had 157 marbles, after each added the same amount, sue had 4 times more than john. how many did they each add?

### Math 157

A 7 inch pizza cost \$8 and a 14 inch pizza costs \$20. Tommy says the smaller pizza is a better buy because the larger pizza is twice as big and more than twice as expensive. Do you agree with his reasoning? Explain why or why not.

### Bio 157

Be able to tell the ovarian, uterine and hormonal changes which occur during each stage of the menstrual cycle. I am not sure what answer she is looking for. Any Help would be great.

### physics

Find the rotational kinetic energy and angular momentum about its axis of the earth due to its daily rotation. Let ME = 6 x 1024 kg, RE = 6.4 x 106 m and ùE = 1.157 x 10-5 rev/sec.

### physics

Find the rotational kinetic energy and angular momentum about its axis of the earth due to its daily rotation. Let ME = 6 x 1024 kg, RE = 6.4 x 106 m and We = 1.157 x 10-5 rev/sec.

### Physics check

If an atom has 104 electrons, 157 neutrons, and 104 protons, what is the atomic number of the nucleus? have no idea

### physics

f Beth exerts a force of 157 . 9 N on the rope, what is the magnitude of the upward component of the force acting on the stake? Answer in units of N

### Algebra

Write the following number in scientific notation. 0.157 I thought the answe was 0.157x10^3. it is wrong need help! No idea how its wrong

### math 157

Consider the experiment of selecting a card from an ordinary deck of 52 playing cards and determine the probibility of the stated event. A. A nonface card or a 7 is drawn B. A card that is not a king and not a spade is drawn. For A a nonface card is 10/13 and for a 7 it is 1/...

### physics for Science

2) You take the following measurements for the distance a toy car travels in 10 seconds during each 5 trials: 157cm, 175cm, 162cm, 168cm, 187cm. What are the relative uncertainties of the distance and time measurements? Which measurement is the most uncertain? · (157 + 175 + ...

### Mat 157

How many three-symbol codes (letter-letter-number) can be made from the letters, S,P,Y, and one digit from the set {0,1,2,...,9] without repetition?

### statistical analysis

How would I run a simple regress calculation in Excel if my independent variable was 149.30 and my dependent bariable was 157.7 Appreciate any help. One point does not yield any regression.

### math

A circular swimming pool has radius of 15 feet. The family that owns the pool wants to erect a circular fence that is 5 feet away from the pool. Which is the closest to the circumference of the fence they will need? A. 94.2 ft B. 125.6 ft C. 157 ft D. 188.4 ft

### math 157

in a subdivision, 67 perecent of the homes have detached garages, 32 perecent have a patio, and 13 percent have both. What is the probability that a house has a patio if you know that it has a detached garage? would it be 32/67?

### math 157

in a subdivision, 67 perecent of the homes have detached garages, 32 perecent have a patio, and 13 percent have both. What is the probability that a house has a patio if you know that it has a detached garage? would it be 32/67?

### Math

The circumference of a circular stage is 157 feet. If Chris paints the stage at a rate of 400 square feet per hour, how long would it take to the nearest hour, for Chris to paint the entire stage?

### math

im using the median to find out the IQR i found that 157.5 is the IQR of the data set below. I keep checking with different calculators but the answers are different 34, 96, 112, 121, 148, 175, 211, 231, 236, 276, 285, 299, 324, 434, 457. May someone confirm my answer

### math 157

at the first tri city meeting where 8 people are from twon A 7 people are from town B and 5 people are from town C. If the council consists of 5 people find the probability that 3 people are from town A and 2 people are from town B. How do i do this

### math 157

at the first tri city meeting where 8 people are from twon A 7 people are from town B and 5 people are from town C. If the council consists of 5 people find the probability that 3 people are from town A and 2 people are from town B. How do i do this

### Math 157

Based on meteorological records, the probability it will snow in a certain town on January 1st is 0.480. Find the probability that in a given year it will not snow on January 1st in that town? Is the answer 0.520 ?

### MATH 157

On a TV game show, the contestant is asked to select a door and then is rewarded with the prize behind the door selected. If the doors can be selected with equal probability, what is the expected value of the selection if the three doors have behind them a \$40,000 foreign car...

### math

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 165 and a variance of 9. The material is considered defective if the breaking strength is less than 157.8 pounds. What is the probability that a single, randomly selected piece...

### Geometry

A circle has a center at (8,2). The point is (3,7) is on the circle. What is the area of the circle to the nearest tenth of a square unit? A. 22.2 B. 44.4 C. 157.1 D. 314.2 (I've been stuck on this question for a while) thanks!!

### physics

On a banked race track, the smallest circular path on which cars can move has a radius r1 = 103 m, while the largest has a radius r2 = 157 m, as the drawing illustrates. The height of the outer wall is 18 m.

### mat 157

Suppose that a natural number from 1 through 9 is selected at random. What is the probabiliy that the number selected is odd if you know that it is prime?

### mat 157

Suppose that a natural number from 1 through 9 is selected at random. What is the probabiliy that the number selected is odd if you know that it is prime?

### mat 157

Suppose that a natural number from 1 through 9 is selected at random. What is the probabiliy that the number selected is odd if you know that it is prime?