MATH SOLVE

4 months ago

Q:
# can someone help with these 3 questions, they are in the pictures!

Accepted Solution

A:

Question One

y = v - 1/2 g t^2 Subtract v from both sides.

y - v = - 1/2 gt^2 Multiply both sides by - 1

-(y - v) = 1/2gt^2 Remove the brackets.

v - y = 1/2 gt^2 Divide by g

(v - y)/g = 1/2 t^2 Multiply by 2 on both sides

2(v - y)/g = t^2 Move the 2 to the denominator on the left.

(v - y) / 0.5g = t^2 Take the square root of both sides.

sqrt [ (v - y) / 0.5g ] = t

Answer: B or second one down <<<<<<<

Question Two

There are no minuses in the answer. That eliminates 2 and 3

km^2 - c = n Add c to both sides.

km^2 = c + n divide both sides by k

m^2 = [c + n]/k Take the square root of m^2

m = sqrt [(c + n)/k]

Answer A or the first one.

Problem 3

This is an estimation question. One value of x is <0 the other > 0

The two graphs cross when x = a bit over 2 and x < about - 5

The answer is C 2.1 and - 5.1 about.

Answer: 2.1 and -5.1

Answer: C <<<<<<<<<

Question One

y = v - 1/2 g t^2 Subtract v from both sides.

y - v = - 1/2 gt^2 Multiply both sides by - 1

-(y - v) = 1/2gt^2 Remove the brackets.

v - y = 1/2 gt^2 Divide by g

(v - y)/g = 1/2 t^2 Multiply by 2 on both sides

2(v - y)/g = t^2 Move the 2 to the denominator on the left.

(v - y) / 0.5g = t^2 Take the square root of both sides.

sqrt [ (v - y) / 0.5g ] = t

Answer: B or second one down <<<<<<<

Question Two

There are no minuses in the answer. That eliminates 2 and 3

km^2 - c = n Add c to both sides.

km^2 = c + n divide both sides by k

m^2 = [c + n]/k Take the square root of m^2

m = sqrt [(c + n)/k]

Answer A or the first one.

Problem 3

This is an estimation question. One value of x is <0 the other > 0

The two graphs cross when x = a bit over 2 and x < about - 5

The answer is C 2.1 and - 5.1 about.

Answer: 2.1 and -5.1

Answer: C <<<<<<<<<