<em>Look</em><em> </em><em>at</em><em> </em><em>the</em><em> </em><em>att</em><em>ached</em><em> </em><em>picture</em>
<em>hope</em><em> </em><em>it</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em> </em><em>.</em><em>.</em><em>.</em><em>.</em>
The square in the graph represents one unit. In the diagram, the line has coordinates (0,4) and (4,0). Use the cpordinates, find the gradient and the equation using y = mx + c. So the equation of this line is x + y = 4. Now having obtained the equation of yhe line, the shaded part is below the line, therefore the inequality is : x + y =< 4
Answer:
12
Step-by-step explanation:
In this question, there are two variables: the number of mangoes(y) bought and the number of oranges bought(x).
Let's say the man have z money, mangoes price is 
z and the oranges price is 
z. The equation for money and number of mangoes and oranges will be:
money = mango price * mangoes bought + orange price * orange bought
z= z * x + z *y
1= x +y
-y= x -1
y= -1.5x + 30
y= 30 - 1.5x
If he want equal number of mango and orange, that mean y=x. The calculation will be:
y= 30 - 1.5x
x= 30 - 1.5x
x+ 1.5x = 30
2.5x= 30
x= 
= 12
The extreme value is −4. To see whether it is a maximum or aminimum, in this case we can simply look at the graph. f(x) is a parabola, and we can see that the turning point is a minimum. By finding the value of x where the derivative is 0, then, we have discovered that the vertex of the parabola is at (3, −4).
Answer:
The number of 20sen and 50sen are 40 and 30
Step-by-step explanation:
I. The clues we got are total price and total coins,
If 1RM = 100sen
Given b is 50sen and s is 20sen
So 2,300 = 50b + 20s => {total price}
70 = b + s => {total coins}
20* 70 = 20b + 20s => {simulate}
II. Find b or s value by eliminate one of them
{total price} - {simulate}
2,300 - 1,400 = 50b - 20b + 20s - 20s
900 = 30b
b = 30
III. Find s value by replace b value in {total coins}
70 = 30 + s
40 = s
IV. Prove by replace b and s value in {total price}
2,300 = 50(30) + 20(40)
2,300 = 1500 + 800
2,300 = 2,300 true
That makes 40 coins of 20sen and 30 coins of 50sen.
Hope that help :)
