2,563 Answered Questions for the topic Maths

10/04/21

The first car has twice the mass of a second car, but only half as much kinetic energy. When both cars increase their speed by 6.0 m/s , they then have the same kinetic energy.
The first car has twice the mass of a second car, but only half as much kinetic energy. When both cars increase their speed by 6.0 m/sm/s , they then have the same kinetic energy. What were the... more
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10/04/21

What is the minimum work needed to push a 850 -kg car 750 m up along a 9.5 ∘ incline? Ignore friction. Express your answer to two significant figures and include the appropriate units.
What is the minimum work needed to push a 850 -kgkg car 750 mm up along a 9.5 ∘∘ incline? Ignore friction.Express your answer to two significant figures and include the appropriate units.
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10/04/21

A 850-kg sports car accelerates from rest to 95 km/h in 5.0 s .
A 850-kgkg sports car accelerates from rest to 95 km/hkm/h in 5.0 ss . What is the average power delivered by the engine?Express your answer to two significant figures and include the appropriate... more
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10/04/21

The first car has twice the mass of a second car, but only half as much kinetic energy. When both cars increase their speed by 6.0 m/sm/s , they then have the same kinetic energy.

The first car has twice the mass of a second car, but only half as much kinetic energy. When both cars increase their speed by 6.0 m/sm/s , they then have the same kinetic energy. What were the... more
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10/04/21

What is the minimum work needed to push a 850 -kg car 750 m up along a 9.5 ∘ incline? Ignore friction. Express your answer to two significant figures and include the appropriate units.
What is the minimum work needed to push a 850 -kgkg car 750 mm up along a 9.5 ∘∘ incline? Ignore friction.Express your answer to two significant figures and include the appropriate units.
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10/04/21

Calculate the force of Earth's gravity on a spacecraft 12,800 km (2 Earth radii) above the Earth's surface if its mass is 1250 kg .
Calculate the force of Earth's gravity on a spacecraft 12,800 kmkm (2 Earth radii) above the Earth's surface if its mass is 1250 kgkg .
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09/29/21

What was this annual percentage increase?
From 1960 to 2000, the world's population doubled. The percentage increase per year is assumed to be the same. What was this annual percentage increase?
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09/29/21

Find the area under the standard normal curve that lies between
z = −2.30 and z = 1.08
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09/28/21

Which number is X?
Which number is X?A+(20% of A) = BB+(20% of B) = CA+(X% of A)=C
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09/28/21

The proportion of people with a mobile phone
In one country, the proportion of people with a mobile phone increased from 1.5 per 10 inhabitants to 8.5 per 10 inhabitants in 15 years.a) What is the percentage increase?b) What further... more
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09/26/21

How many employees does Mr. Salt have working each day, how many hours/shifts do they work, how many trucks are delivering & unloading Wonka Bars each day?
Salt's Peanuts normally has most of their workers shell peanuts. However, for 5 straight days Mr. Salt has had his employees opening Wonka Bars looking for the golden ticket. He claims they've been... more
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Maths Algebra

09/26/21

find all positive integral values of k for which the given trinomial can be factored
1 . x2 + kx + 21 =2 . a2 + ka + 72 =3 . c2 + kc + 45 =4 . d2 + kd - 28 =5 . n2 + 10n + k =6 . g2 + kg - 36 =7 . q2 - kq - 27 =8 . t2 - kt - 48 ... more
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09/24/21

The function F(x) = (x − 3)^2 − 4 for x ∈ (−∞, 3] is one-to-one. What is its inverse function? What is the domain and range of F^ −1 ?
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09/23/21

Find all angles between 0 and 2π satisfying the co...
Find all angles between 0 and 2π satisfying the condition sinθ=√2/2 Separate your answers with commas. θ=
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09/20/21

Ted is packing boxes. He packs 88 boxes in 8 hours. Since he is getting better, each hour he packs 4 more boxes than the previous hour. How many did Ted pack in the 2nd last hour?
Complete using algebra if able.
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09/17/21

Please help ?????????
Determine the domain of the function f(x)=x√x2−62. (Use symbolic notation and fractions where needed. Give your answer as a union of intervals of the form (*,*), listing them in the left to right... more
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09/17/21

Please help ????????
Determine the domain of the function f(x)=4/7x^2−5.(Use symbolic notation and fractions where needed. Give your answers as intervals in the form (*,*). Use inf for infinity, U for combining... more
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09/16/21

AMDM Question (Mathematics)
A vector starts at point (5, -4) and ends at point (0, -8). What is the vertical component of the vector?
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09/16/21

AMDM Question (Mathematics)

A vector starts at point (-5, 6) and ends at point (8, -5). What is the magnitude of the vector? Answer to two decimal places.
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09/13/21

AMDM Response Question (Mathematics)
Find the resulting vector when the vector <4, 1, 2> is multiplied by the matrix.(The matrix is down below)[ 4 3 2 ] 1 5 3 1 3 6
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09/13/21

AMDM Constructed Response Question (Mathematics)
A plane traveling at 300 mph is flying with a bearing of 30°. There is a wind of 50 mph from the south. If no correction is made for the wind, what are the final bearing and ground speed of the plane? more
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09/13/21

AMDM Question (Mathematics)

Final grades are often computed using weighted averages. Some college professors use complicated weighted averages. Your college professor tells you he will give a 33%-67% split on grades between... more
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09/13/21

AMDM Question (Mathematics)

One force of magnitude 50 acts on an object. Another force of magnitude 66 acts on the object at a right angle, what is the magnitude of the resultant force on the object?
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09/13/21

AMDM Question (Mathematics)
Your college professor tells you he will give a 30%-30%-40% split on grades between homework, quizzes, and test. However whichever category you have the highest average in will be the 40%... more
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09/12/21

Determine the equation of a line perpendicular to y=-4/5x+7 and the same y-intercept as 7x-5y+2=0
Determine the equation of a line perpendicular to y=-4/5x+7 and the same y-intercept as 7x-5y+2=0
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