Question 1

[email protected] в категроии Математика, вопрос открыт 19.06.2017 в 20:43

Solve the simultaneous equations:
y - 2x = 1
y2 = 2x2 + x
Question 2
Write the number
a) 2.(816) in the simplest form of
where x and y are integers and y ≠ 0
b) Simplify the expression 3v2+2v3
------------
3v2-2v3
Write your answer in its simplest form of a + bvc
БУКВЫ "v" - это корень

Question 3
For the geometric series
a + ar + ar2 + …….
the sum of the first two terms is 24 and the sum to infinity is 27.
Show that r =+-1/3

Question 4
Given that f(x) = 2x3 + 3x2 - 5x - 6 and (x+1) is a factor, factorise fully the polynomial f(x).
State the set of values of x for which f(x) ≤ 0

Question 5
On the grid below
a) draw the circle with equation x2+y2=25
b) draw the line with equation y = 2x + 1
Estimate the points of intersection to one decimal place.
ДАНА КООРДИНАТНАЯ ПЛОСКОСТЬ.

Question 6
In the diagram below AB is parallel to DE.
a) Prove that triangle ABC is similar to triangle DEC.

b) Work out the value of x in the diagram below.
All values are in cms.
Give your answer to 2 decimal places.

Question 7
A water tank has a radius of 80cm and a length of 200cm.
It is half filled with water.
120 litres per day is used to water a garden.
For how many days can the garden be watered from the tank?
Use 3.14 for the value of n
Give your answer to the nearest whole day.
The volume of cylinder = nr2l
1cm3 = 1 millilitre

Question 8
A bathroom floor is being tiled.
One size of square tile will cover the floor with 200 tiles.
Another square tile, with sides 2 cm less, will use 250 tiles to cover the same area.
Find the size of the larger tiles to the nearest cm.

ПРОШУ ЭТО ОЧЕНЬ ВАЖНО,ПОМОГИТЕ НАРОД,БУДУ ОЧЕНЬ БЛАГОДАРЕН ВАМ,СПАСИБО ЗАРАНЕЕ ДОБРЫМ ЛЮДЯМ...НАДЕЖДА НА ВАС.