6,938 Answered Questions for the topic mathematics

Mathematics Math

11/07/21

You need a 10% alcohol solution. On hand, you have a 935 mL of a 5% alcohol mixture. You also have 95% alcohol mixture.

How much of the 95% mixture will you need to add to obtain the desired solution?
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11/06/21

Binomial Distribution
The distribution of weights for the population of females in the United States is approximately normal with mean µ = 135.4 pounds and standard deviation σ = 21.3 pounds.  What is the probability... more
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Mathematics Math

11/05/21

The product of two consecutive positive integers is 6 more than six times the sum of the two integers. Find the two integers.

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Mathematics Math

11/05/21

I think of a two digit number. The ones digit is 6 more than the tens digit. The number is 12 more than the product of its digits. Find the original number.
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11/05/21

From the following formula of hydrophilic ointment solve for the quantities of each ingredient needed to prepare 5 lb (Avoir) of the ointment. Note: 1 lb = 454 g (avoir)
Methylparaben 0.25 gPropylparaben 0.15 gSodium lauryl sulfate 10 gPropylene glycol 120 gStearyl alcohol 250 gWhite Petrolatum 250 gPurified Water, add 1000 ga) Use Ratio & Proportion for... more
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Mathematics Math Calculus

11/04/21

I don't understand how you are supposed to do this

Helium is being pumped into a spherical balloon at a rate of 8 cubic centimeters per second. How fast is the radius of the balloon increasing when the radius is 7 centimeters? Round your answer to... more
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Mathematics Math Geometry

11/04/21

geometry question <1 and <2 are complimentary <1= 17o what is <2

If ∠1 and ∠2 are complementary and m∠1 = 17o, what is m∠2?
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Mathematics Math Algebra 2

11/03/21

y=x^2+bx+c; (-3,-6) and i gotta find the unknown coefficients
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Mathematics Math

11/03/21

In a football game the quarterback completed 16 of 25 passes what percent of passes were completed
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Mathematics Math Proofs

11/01/21

Proof question about division
How to prove that if n|a-b, then n|ak-bk, similarly if n|a-b, then n|(a-b)k
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Mathematics Math Calculus Precalculus

10/31/21

Find the Derivatives
1) y = 3x-√x2) y = t^4-5t-33) y= t/3-t
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Mathematics Math Calculus Precalculus

10/31/21

f(x)=x^2-x+3, Find f(0), f(2), f(-4)
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Mathematics Math Biology Statistics

10/31/21

Statistics Probability Question
Let Y be a random variable that represents the number of infants in a group of 4,000 who die from asthma in a year. In the United States, the probability that a child dies from an acute asthma... more
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Mathematics Math Algebra 1 Algebra 2

10/30/21

Check each of the given numbers to see if they are solutions to each equation. Show your checks and summarize which are solutions and which are not:
a). n=4n+5 n=-3,-5/3,0,5/3b). m-2m2=-120 m=10,8,1,-2,-7.5
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Mathematics Math Algebra 1 Algebra 2

10/30/21

List the Inverse of the Operations that were applied to y:
List the Inverse of the Operations that were applied to y:y3/12-7
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Mathematics Math Algebra 1 Algebra 2

10/30/21

Consider the expression:
Consider the expression: x2(13-x)a). Evaluate the expression when x is -23. b). What objects are being subtracted? c). What objects are being multiplied?
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Mathematics Math Biology Statistics

10/30/21

Probability Question

 Consider a group of nine individuals selected from the AARP (American Association of Retired People) of 50-year-olds and above in the United States. The number of persons in this sample who suffer... more
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Mathematics Biology Chemistry Physics

10/29/21

Honors High School Chemistry
What is the mass of CO2 (carbon dioxide) and H2O (water) formed from the reaction of 1 mole each of n-pentane, n-hexane, n-heptane, and n-octane with an excess of O2 (oxygen gas)? Assume 100%... more
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Mathematics Biology Chemistry Physics

10/29/21

What is the structure of Covid?

What is the structure of Covid? It requires advanced understanding of geomtry, trigonometry, calculus, amino acids, organic chemistry, biochemistry, and various other knowledge areas.
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Mathematics Math

10/29/21

A chemist has 100mL of 40% acid. She wants to reduce the strength of the solution to 25% acid by adding water. How much water should she add?
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Mathematics Math

10/29/21

A sales clerk can choose from two salary plans: straight 7% commission or $150 + 2% commission. How much would the clerk have to sell for each plan to produce the same monthly payment?
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Mathematics Math

10/29/21

How much of a 40% antifreeze solution must a mechanic mix with an 80% antifreeze solution of 20L if a 50% antifreeze solution are needed
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Mathematics Math Algebra 1 Algebra 2

10/29/21

Simplify each expression (if it is already simplified, state that it is already simplified):
a). 4x8-y3+33/14zb). 4C-5C+6C-7C+8C2c). (4D)(-5D)(6D)(-7D)(8D2)d). -12(444cd5e6543/F-G)0-10x0e). (3xy2)10(x3y)2+(2x2)8(-7y6)4
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Mathematics Math Algebra 1 Algebra 2

10/29/21

An oil tanker train car is in the shape of a cylinder (on its side).
An oil tanker train car is in the shape of a cylinder (on its side). The train car is 75 feet long and 8 feet 6 inches across (and so 8 feet 6 inches for the diameter). Approximate the capacity... more
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Mathematics Math Algebra 1 Algebra 2

10/29/21

Looking at the houses for sale in a certain city:
Looking at the houses for sale in a certain city: 12 are listed at $300,000; 6 are listed at $400,000; 8 are listed at $500,000 and 2 are listed at $1,450,000. a) Find the mean, median, and mode... more
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