5,642 Answered Questions for the topic mathematics

Mathematics Math

29d

Unit Conversion Word Problem

While in the hospital, the doctor writes an order for an antibiotic at 300mg/kg daily. Assuming that you weigh 123 lb, how many milligrams should you be given per day?
Mathematics Math Algebra 1 Algebra

29d

Rationalise the denominator and simplify fully (10+3√2)/√2

Rationalise the denominator and simplify fully (10+3√2)/√2. Show working clearly.
Mathematics Math Algebra 1 Algebra

08/19/21

Correct to 1 significant figure, the area of a rectangle is 80 cm2. Correct to 2 significant figures, the length of the rectangle is 12 cm. Calculate the upper bound for the perimeter of the rectangle

Correct to 1 significant figure, the area of a rectangle is 80 cm2. Correct to 2 significant figures, the length of the rectangle is 12 cm. Calculate the upper bound for the perimeter of the... more
Mathematics Math Algebra 1 Algebra

08/18/21

Simplify (7 + 2√50) (5 - 2√2). Give your answer in the form a+b√18 where a and b are integers. Show your working clearly.

Simplify (7 + 2√50) (5 - 2√2). Give your answer in the form a+b√18 where a and b are integers. Show your working clearly.

08/18/21

Solve the equation 7z/z+7 = 7+3i , z is an element of C

Mathematics Math Algebra 1 Algebra

08/17/21

The point A has coordinates (0,2). The point B has coordinates (-4,-1). Find the coordinates of the midpoint of AB. Work out the gradient of the line AB. Find an equation of the line AB.

The point A has coordinates (0,2). The point B has coordinates (-4,-1). Find the coordinates of the midpoint of AB. Work out the gradient of the line AB. Find an equation of the line AB.
Mathematics Math Algebra 1 Sat Math

08/17/21

(5+3√2)^2=p+q/√8, where p and q are integers. Find the value of q.

(5+3√2)^2=p+q/√8, where p and q are integers. Find the value of q. I'm not sure what to do.
Mathematics Math Algebra

08/17/21

Expand (5+3√2)^2. Give your answer in the form (a+b√c), where a and b are integers. Show your working clearly.

Expand (5+3√2)^2. Give your answer in the form (a+b√c), where a and b are integers. Show your working clearly. I need help, please.
Mathematics Algebra 1

08/17/21

The average of a and twice b is fifty-two. PLEASE answer quickly

Mathematics Algebra 1

08/17/21

Seven more than twice a number equals fifteen PLEASE answer quickly

Mathematics Algebra 1

08/17/21

Two times a number less 4 is 20.

Mathematics Math Algebra

08/17/21

Given that c is a prime number, rationalise the denominator of 3c-√c / √c. Simplify the answer.

Given that c is a prime number, rationalise the denominator of 3c-√c / √c. Simplify the answer.
Mathematics Math Algebra

08/17/21

Make x the subject of y = √2x+1/x-1

Make x the subject of y = √2x+1/x-1
Mathematics Math Statistics Sat Math

08/17/21

4. Find P( -1.2 < Z < -0.2 )

4. Find P( -1.2 < Z < -0.2 )
Mathematics Math Statistics

08/17/21

Does the confidence interval support that more than 50% of Americans approve of Trump? Why or why not? 

A recent Gallop poll showed Trump’s approval rating 40% with a margin or error of 3%. a) Find the confidence interval. c) Does the confidence interval support that more than 50% of Americans... more
Mathematics Math Algebra

08/15/21

Given that p is a prime number, rationalise the denominator of 7√p - p^2 / √p^3. Simplify the answer

Given that p is a prime number, rationalise the denominator of 7√p - p^2 / √p^3. Simplify the answer
Mathematics Math Calculus Geometry

08/15/21

Consider the planes given by the equations

Consider the planes given by the equations −(x+2y+4z)=1, 4x+2y+z=7.(a) Find a vector v-> parallel to the line of intersection of the planes.v-> =... more

The question is about probability and about actuarial statistics

The question has 3 parts -Question- In a class of 92 students probability of you getting to the top is half of any other student. What is the probability of you getting to the top ?These 92... more
Mathematics Math Calculus Geometry

08/15/21

Find a vectors perpendicular and parallel to the plane.

(a) Find a vector n-> perpendicular to the plane z=7x+8y. n-> =(b) Find a vector v-> parallel to the plane. v->=
Mathematics Math Geometry Sat Math

08/15/21

Suppose a line is given by the system of equations

Suppose a line is given by the system of equationsx=4−5t,y=4t−5,z=−3−4t.Then the vector and point that were used to define this line werev- =p =
Mathematics Math Calculus Geometry

08/15/21

find the following cross products.

If a=⟨1,2,1⟩ and b=⟨5,11,1⟩, find the following cross products.1. a×b= 2. b×a=
Mathematics Math Algebra

08/15/21

How do I solve 4/e-3=5

Please help. How do I solve 4/e-3=5
Mathematics Math Algebra

08/14/21

Simplify (2x+3)^2 - (2x +3)(x-5). Give your answer in the form ax^2 +bx +c

Simplify (2x+3)^2 - (2x +3)(x-5). Give your answer in the form ax^2 +bx +c. How do I do this?

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