What is the numerical coefficient of '-3z'?

Answers

Answer 1

Answer:

Answer: -3

Step-by-step explanation:

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Simplify the expression. 6p5

Answers

If you are considering P of the permutation and combination. Then simply pit the figure 6P5 in calculator and your answer will be 720. Or if not calculator then the formula is P(n,r)= n(factorial)/ (n-r)factorial.

The local video store charges a monthly membership fee of $5 and $2.25 per video, write this as a algebraic expression

Answers

Answer:

$5 + ($2.25x)

Step-by-step explanation:

The local video store charges a monthly membership fee = $5

and per video charges = $2.25

Let the videos taken = x

So, the algebraic expression to calculate the total monthly charges will be

$5 + ($2.25x)

$5+ ($2.25x)=y

I believe this is correct.

James paddles upstream in a canoe at 2mph (relative to the shore), and when he paddles down-stream, he goes 9mph. Find the speed of the current and the speed James can paddle in still water and come up with an equation.

Answers

Let x represent James's speed and y represent the speed of the current. Since upstream the current goes against him, $x-y=2$ describes the speed upstream, and since downstream the current goes with him, $x+y=9$ describes the speed downstream.

Use elimination to solve for x: $x-y=2 \n -(x+y=9) \n =-2y=-7 \n y=7/2$ or 3.5 miles per hour for James in still water. Substitute y into either original equation: $x-(7/2)=2 \n x=11/2$ or 5.5 miles per hour for the current. As far as an equation, you can use $y=(11/2)x$ , where x is the number of hours James has paddled in still water and y is the distance he has traveled (in miles).

Not sure what equation you're looking for, but against the current he goes 2 mph and with he goes 9mph, so 9-2=7mph difference between them, divided by 2 = 3.5 mph of the current. So in this case, James can paddle 2+3.5= 5.5 mph in still water and the current moves at 3.5 mph.

James can paddle 5.5 mph
The current moves at 3.5 mph
Equation: speed = 5.5 + 3.5x where x can equal -1, 0, or 1 depending on whether James is going with the current (x = 1), without the current (x = 0), or against the current (x = -1)

What is the answer for 56% of 80

Answers

56% of 80 56/100 X 80/1= 224/5 = 44 4/5 or 44.8

0.56 x 80 = 44.8

(56% divided by 100 to get the percentage and will work for any percentage

find the dimensions of rectangle whose perimeter is 112cm and whose breadth is 4 cm less than half its length

Answers

Answer:

Length = 40 cm

Width = 16 cm

Step-by-step explanation:

Length = x

Width = 1/2x -4

2 times length + 2 times width = perimeter

2x + 2(1/2x - 4) = 112 cm

2x + 2/2 x - 8 = 112 cm

2x + x = 112 + 8

3x = 120

x = 120/3

x = 40

Width = 40/2 - 4

The square of a number exceeds that number by 12. What are the two possible solutions?3 or -4
3 or 4
-3 or 4

Answers

x^2=x+12
minus x+12 both sides
x^2-x-12=0
factor
(x-3)(x+4)=0
set each to zero

x-3=0
x=3

x+4=0
x=-4

x=3 or -4

answer is first one

The square of a number exceeds that number by 12. What are the two possible solutions would e B i think

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1000 equals 50 divided by X?

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