# Math

## Recent Questions

math
if x is zero, are the following problems equal? 9x-3x-4, 12x-4, 5x+x-4?

math
Brianna says 3 equations equal -4 if x is zero. Brianna's thinking is wrong

math
which expression represents 12xthe number n? 1)n+12 2)12n 3)n-12 4)n over 12***

math
which expression represents 5 less than y? 1) y-5*** 2)5-y 3)y over 5 4)5y-1

math
the load which a crame can lift up is directly proportional to the mass and inversely proportional to the height through which the load is to be lifted. If a load of 40 and mass of 175gm is lifted through height of 286m from what load will be carried through height 50m given ...

Math
A particle of mass 4 units moves along x axis attracted towards the origin by a force with magnitude 8x. if it is initially at rest at x=10, then the frequency of the particle is

Math
OK I need help please I think it's 7 but not sure. If a circle is cut into 2 pieces. A triangle in 4 pieces ,a square into 5 pieces, what is next shape and how many pieces will be cut?

Math
Luna is building a two piece roof for her shed. The width of the shed is 8ft, one roof piece is 4ft long and the other is 6ft long. What angle is formed at the peak of the roof? Ans: 104 degrees ( I need the work)

Math
A bushel is a unit of volume often used to measure dry, agriculture commodities, and the one bushel is approximately 32L. A 1:50 scale model of a grain bin is capable of holding 0.112 bushels. How many bushels can the full-size bin hold? Ans: 14 000 bushels ( but you have to ...

Math
Wit is planning on replacing the floor tiles in his kitchen. Wit has found four types of tiles he likes, and wants to compare their prices Tile A: TileB: TileC: TileD: Dimensions ( in) 12x24( A) 18x18 (B) 3x6(C) 12x12 (D) Tiles per carton: 8 (A) 6(B) 43( C) 15(D) Priced per ...

Math
A piece of a broken circular gear is brought into a metal shop so that a replacement can be built. A ruler is placed across two points on the rim, and the length of the chord is found to be 14 inches. The distance from the midpoint of this chord to the nearest point on the rim...

Math
a piece of a broken circular gear is brought into a metal shop so that a replacement can be built. a ruler is placed across two points on the rim, and the length of the chordd is found to be 14 inches. the distance from the midpoint of this chord to the nearest point on the ...

Math
The denominator of a fraction exceeds the numerator by 7. If 3 is added to the numerator and 1 is subtracted from the denominator, the resulting fraction is equal to 4/5 . Find the original fraction. PLZ SHOW ALL WORK AND HURRY!!!

Math
A jar contains 5 blue marble, 8 red marbles, 4 white marbles,and purple marbles. Suppose you pick a marble at random without looking. Find the probability of each event. Choosing a blue marble, putting it back, then choosing a purple? (Simplest form)

Math
Suppose dasha has 217 grams of sand in the bucket and 146 grams of shells. What is the mass of the sand and the shells? Write an equation to solve.

Math
While at the beach, dasha uses this bucket to make a sand castle. She fills the bucket 8 times with wate. How many liters of water does she use? Write an equation to solve.

math
in lotto draw balls 1-50 mixed together. machine randomly selects numbers 13,11,7,27,41. is the 6th number drown A. more like to be odd than even b. more likely to be even than odd c. equally likely i could not decide, as long as there even and odd numbers, there is a ...

math
if a tree is 10 ft tall after 2 yr. and 25 ft tall after 5 yr. find the rate of change of growth if y is the height and x is the number of years

math
If 6/7 is expressed as an infinite decimal, what digit would be in the 327th decimal place?

Math
I bought 24 bananas. Each banana weight 50 grams. If the price for bananas was \$5.50 per kg, how much did I pay? I already did 24*50= 1,200 but I can't figure out the rest.

Math
A typical around a track in the United States has a length of 440 yards. How many laps would need to be completed to run a mile

Math
Regular triangular pyramid has the slant height k=12 cm and lateral area A = 198 cm2. Find the length of the base edge.

math
3) You are fencing a rectangular puppy kennel with 25 ft of fence. The side of the kennel against your house does not need a fence. This side is 9 ft long. Find the dimensions of the kennel. 4) A gardener is planning a rectangular garden area in a community garden. His garden ...

Math
1.Which of the following are independent events? Flipping a coin and rolling a number cube*** Choosing two marbles without replacement Spinning a spinner twice Choosing a card, replacing it, and then choosing another card*** 2.A bag holds 3 blue marbles 5 red marbles and 2 ...

find the area of the parrallelogram with a base of 372.5 cm and a height of 17.6 cm A) 398.8 cm2 B) 327.8 cm2 C) 13,112 cm2 D) 6,556 cm2 My guess is B but i need help

Math
Find the perimeter of a regular 360-sided polygon that is inscribed in a circle of radius 5 inches. If someone did not remember the formula for the circumference of a circle, how could that person use a calculator’s trigonometric functions to find the circumference of a ...

Math (Physics)
A galaxy is moving away from Earth. The "blue" hydrogen line at 434 nm emitted from the galaxy is measured on Earth to be 458 nm . Part A How fast is the galaxy moving? Answer--> v=____ c Part B How far is it from Earth based on Hubble's law? Answer--> d=____ ly [Please ...

Math
What is the formula to finding slant height in a pyramid? Thanks!! :)

Math
How to write 26 April 2017 in 5 letters without digit

math
You roll a number cube twice. Find P (even, then not 2). Write the probability as a fraction in simplest form. I'm fully clueless to the answer to this question. Can someone please help me out? Thanks Very Much and need the answer A.S.A.P!

Math
My Father went shopping with a sum of money. He spent 1/2 of her money plus 50 pesos on a belt. He then spent 1/2 of the remaining money plus 30 pesos on a pair of sandals. Finally he spent 1/5 of what was left plus 20 pesos on a T-shirt . He was left with 15 pesos. How much ...

math-precalculus
Outside temperature over a day can be modeled as a sinusoidal function. Suppose you know the temperature varies between 73 and 87 degrees during the day and the average daily temperature first occurs at 8 AM. How many hours after midnight, to two decimal places, does the ...

Math, Algebra, Graphing Systems of Linear Equation
I'm confused about graphing or solving the linear equations for slope/intercept. Here is what I solved: 3x+2y=-6 X-4y=-16 2y= -3x-6 -4y=1x-16 Y=-3/2+3 Y=+1/4+4 ------------- My answer for graphing the systems for the lines to intersect...well, they didn't intersect. But the ...

Math, Algebra, Graphing Systems of Linear Equation
I'm confused about graphing or solving the linear equations for slope/intercept. Here is what I solved: 3x+2y=-6 X-4y=-16 2y= -3x-6 -4y=1x-16 Y=-3/2+3 Y=+1/4+4 ------------- My answer for graphing the systems for the lines to intersect...well, they didn't intersect. But the ...

Roger visted a ski and snowboard shop the other day to buy a new snowboard. The store said it was having a sale, today only. 20% off all new 2016 Burton Snowboards. Usually these snowboards cost \$300 when they're not on sale. Roger told his friend John they are only \$60 today...

math
How many degrees did the minute hand turn. 4.20p.m

Math
on a map 1/2 inch represents 50 miles. How long would a line need to be to represent 750 miles. so I thought I should divide 750 by 50 than multiply 15 { the answer I got } by 1/2 but I have a feeling its wrong

Math
a fund has 50,000 in it's account.if it earns 9.79%,how much interest will it have after 459 days? Note: It is a compound Interest.

Math
How many yards do you need to make 15 t shirts with only 3/4 yards please explain

math
Find the pressure exerted by the atmosphere on a car window which is 30 cm tall and 40 cm wide if atmospheric pressure is 101,000 Pa. (Remember that a Pa = N/m2)

Math 8
write a linear equation that models you borrow \$120 from your brother. You plan to pay him \$15 per week towards the loan. 120=15x or y=15x-120

Math
. In how many different ways can Tim, Savannah, Ian, Haley, Kaash, and Myles line up? 2. There are 15 contestants in a boy’s cross country race. 3 ribbons will be awarded. How many different ways could the ribbons be awarded? 3. How many different ways can the letters H D R ...

Al and Bill live at opposite ends of the same street. Al had to deliver a parcel to Bill’s home, Bill one at Al’s home. They started at the same moment, each walked at constant speed and returned home immediately after leaving the parcel at its destination. They met the ...

Math
if a note has a frequency of 220 hz find the frequencies of the notes one two and three octaves

math
1. Find the area of a parallelogram with base b and height h. b = 87 cm h = 18.6 cm (1 point) 105.6 cm2 211.2 cm2 809.1 cm2 1,618.2 cm2 2. Find the area of the triangle. A triangle has a base of 21 yards and a perpendicular height of 8.2 yards. (1 point) 33.62 yd2 86.1 yd2 344...

math
given cot theta = 11/12, find tan of theta and sin of theta

MAth
Which of the following types of information is NOT suited for display on a double bar graph? A. population of boys and girls at three different schools. B. Numbers of records versus compact discs sold each week during a one month period at The Music Den. C. the weekly interest...

20. Suppose a population of 175 crayfish doubles in size every month. The function f(x)=175(2^x) gives the population after x months. How many crayfish will there be after 1 year? A) 2,100 B) 4,200 C) 716,800 D) 61,250 I think the answer is D. Am I correct?

Math
Which function table is correct for this rule : Y = x/2 + 4 (cant copy and paste) A (my answer) B C D

Al and Bill live at opposite ends of the same street. Al had to deliver a parcel to Bill’s home, Bill one at Al’s home. They started at the same moment, each walked at constant speed and returned home immediately after leaving the parcel at its destination. They met the ...

Connections math help
the equation is 3d + 2 equals 29 can be used to find the height of a bean plant days after it was purchased how many days has it been since the plant was purchased A.7.6 B.8 C.9 D.10.3

math
A mountain bike tire has a diameter of 26 inches. To the nearest foot, how far does the tire travel when it makes 32 revolutions?

math
Identify the dependent variable in the relationship. A person burns a total of "c" calories by walking "m" miles. 1)calories 2)miles 3)neither "c" calories or "m" miles 4) both "c" calories and "m" miles I THINK #2, not sure because we have not gone over independent/dependent ...

Math
Suppose that the local sales tax rate is 3% and you purchase a car for 27,700, how much tax is paid

math
Imagine that you have five blue socks and five brown socks in a drawer that are not paired up. How many socks must you take out from the drawer(without looking to be sure of getting a pair of the same color?

math
(x + 1)^2 / (x - 2) => (x - 2 + 3)^2 / (x - 2) => ((x - 2) + 3)^2 / (x - 2) => ((x - 2)^2 + 6 * (x - 2) + 9) / (x - 2) => (x - 2)^2 / (x - 2) + 6 * (x - 2) / (x - 2) + 9 / (x - 2) => x - 2 + 6 + 9 / (x - 2) => x + 4 + 9 / (x - 2) As x goes to infinity, 9/(x...

Math - Calculus
Suppose you live near a bay where the water level fluctuates due to the tides. Your bay is an inverted cone with a radius of 1 mile, and a depth in the center of 100 feet. (There are 5280 feet in a mile.) Water flows through a channel in and out of the bay with the tides. You ...

math
hey how do i find the oblique asymptote of (x+1)^2/(x-2)

Math (Physics)
What is the resistance of a 3.9-m length of copper wire 1.1 mm in diameter? The resistivity of copper is 1.68×10^−8Ω⋅m. R=______ Ω Please Help. I've been at this for hours.

Math(Calculus)
Im having a real difficult time solving this question. Find the absolute extrema of the function. h(x) = e^x^(2) - 4 on [-2,2] Absolute maximum value: at x = Absolute minimum value: at x =

Math
During a recent survey of two middle school classrooms, 1/3 of the students reported that they bring their lunch to school. Another 1/4 reported that they buy their lunch in the cafeteria and 1/6 reported going home for lunch. The remaining 18 students reported that they don't...

math
Which ratio can form a proportion with 3/7?

Math
Evaluate the determinant of each matrix -3 2 -3 0 -1 -1 3 0 -3 My answer is -36 The correct answer is -24 but I don't understand how they got the answer.

Math(Physics)
How much energy is stored by the electric field between two square plates, 7.9 cm on a side, separated by a 2.5-mm air gap? The charges on the plates are equal and opposite and of magnitude 15 nC . Answer--> PE=_____ J PE = potential energy? I got this wrong twice. [119805....

Math
Kaylea makes punch for 60 students in the band. She fills a 2-quart pitcher 6 times with orange soda. How many gallons of orange soda does Kaylea use for the punch?

math
5/8 divided by y/9 = 1 1/8

math
is the vertical asymptotes in the numerator or denominator? why? can you please explain you answer

Math
Find the inverse for the following matrices: 2 and -4 is on top 6 and 3 is on bottom My answer is 90 120 -180 60

math
The length of a rectangle is 4 in longer than its width. If the perimeter of the rectangle is 48 in, find its area.

Math
From a pool of six juniors and eight seniors three co captains will be chosen for the football team. How many different combinations are possible if one junior and two seniors are chosen?

math
Excited about the success of celebrity stamps, post office officials were rumored to have put forth a plan to institute two new types of thermometers. On these new scales, E° represents degrees Elvis and M° represents degrees Madonna. If it is known that 40°E = 25°M, and ...

math
Account A and B each start out with \$500. If Account A earns \$50 each year and Account B earns 5% of its value each year, after how many years will Account B have more money than Account A? If necessary, round your answer to the nearest year.

6th grd math
How can i find the area of a 14inch circle? Thank You so much!

Math
The length of a rectangle is three times its width. If the perimeter of the rectangle is 48cm,find its area.

Math
Translate the sentence into an inequality. The sum of a number times 10 and 27 is at least −20..... How do I write this????

Math
Jack is learning to ride a bicycle. In his first try, he rode for 1/100mile. The second time he rode for 5/100 mile. In the next two tries, he rode successfully for 2/10 mile and lo 4/10 mile Part A What is the total distance he rode the bike in four tries? Use words, numbers...

Math
Sofia spins the pointer of a spinner that has 5 equal sections numbered 1 to 5. Choose True or False for each statement. A. It is likely that the pointer will land on a factor of 4. B. It is as likely as not that the pointer will land on an odd number. C. It is unlikely that ...

Math
Darrin tosses a quarter and a penny 20 times. He gets heads on both coins twice. Compare the theoretical probability of getting heads on both coins with Darrin’s experimental probability of getting heads on both coins. Why might the probabilities differ?

Math (HELP ASAP!)
1. Find the slope of the line that passes through (-2,1), (1,10). a. 3 b. -3 c. 1/3 d. -1/3 2. Which equation represents a direct variation? What is the constant variation? a.3y = 2x + 1; 1 b.y = -5x - 11; 5 c.4y = -12x; -3 d.y + 7 = 2x - 1; 7 3. Suppose y varies directly with...

Math
A general point on a curve is P(3+4costheta,2+4sintheta). Show that the locus of P is a circle and find the centre and radius

Math
Problem: What is the resistance of a 3.9-m length of copper wire 1.1 mm in diameter? The resistivity of copper is 1.68×10^−8Ω⋅m. Answer--> R=______Ω

Math
The experimental probability that a person in the United States has the A+ blood type is 35.7%. The experimental probability that a person in the United States has the AB– blood type is 0.6%. Last week, a blood bank received 224 donations. Predict how many more A+ donations ...

math
A line has a slope of 2. It passes through the point (1,2) and (3,y). What is the value of y ? Please help. Is there like a specific difference I'm suppose to find? I'm super confused.

Math
what is the recursive rule for the sequence -7.4, -21.2, -35, -48.8, -62.6 an=an-1+13.8 an=an+1+13.8 an=an+1-13.8 <-- or D an=an-1-13.8 <-- or C

math
what is the value of b in the equation? 4(b -1)=2b+10 4b-4=2b+10 -2b=14 b=-7 is this right?

Math - probability
The experimental probability that a person in the United States has the A+ blood type is 35.7%. The experimental probability that a person in the United States has the AB– blood type is 0.6%. Last week, a blood bank received 224 donations. Predict how many more A+ donations ...

Math
Patty tosses a coin and rolls a number cube. 1)Find the probability that the coin lands on heads and the cube lands on an even number 2)Patty tosses the coin and rolls the number cube 60 times. Predict how many times the coin will land on Heads and the cube will land on an ...

Math
picking a 7 from a standard deck of 52 cards. a standard deck includes 4 cards of each number from 2 to 10 What is the probability?

Math
Artist used squares of colored glass that measured 1/4foot by 1/4 foot. How many colored squares did he use?

math
A ten foot long ladder leans against a wall, with the top of the ladder being eight feet above the ground. What is the approximate angle that the ladder makes with the ground? A) 37° B) 47° C) 53° D) 60°

Math
Simplify dg-8^6x+9.4

Math (Physics)
Problem: What wavelength photon would be required to ionize a hydrogen atom in the ground state and give the ejected electron a kinetic energy of 19.1 eV ? Answer--> λ =______nm [Note: I got 3.8x10^-8. I got it wrong twice] My steps: (32.7 eV)(1.6x10^19)= 52.32x10^-19 Next...

Math (Physics)
Problem: An excited hydrogen atom could, in principle, have a radius of 2.50 mm . ________ Part A: What would be the value of n for a Bohr orbit of this size? Answer--> n= 6.87×103 _______ Part B What would its energy be? Answer--> E=_______eV [Note: I got 4.61x10^-26 ...

Math
6 times the difference of a number and 9 is 18 less than the number. I need to write out as an equasion. Help!

Math Questions Mrs Sue Help
4t – t – 1 = 17 T=? 4r – 3r – 1 = 2 r=? 12 = -4(d + 13) d=? 12 p = 4 p=? -4n – 18n + 4 = -18 n=? These are really confusing

Math
Jim owns a small business. There was a loss of \$26 on Thursday and a loss of \$11 on Friday. On Saturday there was a loss of \$9, and on Sunday there was a profit of \$13. Find the total profit or loss for the 4 days.

Mrs Sue Math
5d + 13d = -18 D=?

MATH
The perimeter of the base of the regular quadrilateral pyramid is P = 30 cm. Find the sum of all edges of this pyramid, if the perimeter of a lateral face is 27.5 cm

Math
The perimeter of the base of the regular quadrilateral pyramid is P = 30 cm. Find the sum of all edges of this pyramid, if the perimeter of a lateral face is 27.5 cm

math
The patient is seen by his family physician for follow-up treatment of recently diagnosed asthmatic bronchitis. The physicianâ€™s fee is \$75. The patientâ€™s copayment is \$20, and the patient is not required to pay any additional amount to the provider. The payer ...