What is -4x=-2+4y -4y=1-4x

Answers

Answer 1

Answer: I hope this helps you

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There are 25 pupils in a class 11 pupils scored below 50 marks in a math test and the rest scored 50 marks or above if the passing mark is 50 find the percentage of pupils who passed the test. Step by step

Answers

Step 1: 25 - 11 = 14 (This is the number of pupils who passed the test)

Step 2: 14/25 = .56

Step 3: .56 is 56%

Answer: 56% of pupils passed the test

25 people total
passing mark is 50%

total number of people (25) - people who didn’t pass (11) = people who passed

25-11=14

Which is the length of PQ if the length of AB is 8?

Answers

I think that the answer is 3

AB = 8 so half of that is 4.

Using Pythagoras:

PQ^2 = 5^2 - 4^2

PQ^2 = 25 - 16 = 9

PQ = 3

A conference room is in the shape of a rectangle. Its floor has a length of (x − 4) meters and a width of (3x − 1) meters. The expression below represents the area of the floor of the room in square meters:(x − 4)(3x − 1)

Which of the following simplified expressions represents the area of the floor of the conference room in square meters? (5 points)

A.x2 − 13x + 4
B.3x2 − 13x + 4
C.3x2 − 11x + 4
D.x2 − 12x + 4

Answers

To know the area of a rectangle the equation L x W is used where L is length and W is width. In this problem L is x-4 while W is 3x-1, by simply multiplying both we can get the area.
in equation,
(x-4)(3x-1)
3x^2-1x-12x+4
3x^2-13x+4.
The letter B. 3x^2 - 13x +4 is the simplified expression which represents the area of the floor of the conference room in square meters.

Answer: it’s b, 3x^2-13x+4. I took the test

Step-by-step explanation:

Find the equation of a straight line passing through the point (0,1) which is perpendicular to the line y=-2x+2

Answers

Answer:

y = $(1)/(2)$ x + 1

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = - 2x + 2 ← is in slope- intercept form

with slope m = - 2

Given a line with slope m then the slope of a line perpendicular to it is

$m_(perpendicular)$ = - $(1)/(m)$ = - $(1)/(-2)$ = $(1)/(2)$

The line crosses the y- axis at (0, 1) ⇒ c = 1 , then

y = $(1)/(2)$ x + 1 ← equation of perpendicular line

A particular beach is eroding at a rate of 4 centimeters per year. A realtor converts this rate to millimeters per day. Which expression, when evaluated, results in the correct units and numerical value?

Answers

Answer:

0.11mm/day

Step-by-step explanation:

We are given that

A particular is eroding at the rate=4 cm/ year

We have to convert this rate on milimeters per day.

We know that

1 year=365 days

1 cm=10 mm

Rate= $(4* 10)/(365)$

Rate= $0.1096=0.11 mm/day$

Answer:0.11 mm/day

4 cm/year * 10mm/cm * 1year/365day ≈ 0.11 mm/day

A rectangular tank is 38 cm long, 24 cm wide, and 15 cm high. It is filled with water up to 3/5 of its height. Find the volume of water in the tank.