1 and 3/4
takes out 1/4
so 1 and 3/4-1/4
remember that 1 and 3/4=1+3/4
remember that 3/4=1/4+1/4+1/4 so
1 and 3/4-1/4=1+1/4+1/4+1/4-1/4=1+1/4+1/4+(1/4-1/4)=1+1/4+1/4+(0)=1+1/4 +1/4=1+2/4=1+1/2=1 and 1/2
it called for 1 ad 1/2 cup
By solving a linear equation, we conclude that you bought 4 buns and 5 cakes.
<h3>
How many of each did I buy?</h3>
We will define the two variables:
- x = number of buns bought.
- y = number of cakes bought.
We know that you spent exactly £4.35, then we only need to solve the linear equation:
x*0.40 + y*0.55 = 4.35
We need to solve that equation for x and y, such that the values of x and y can only be positive whole numbers.
We can rewrite the equation as:
y*0.55 = 4.35 - x*0.40
y = (4.35 - x*0.40)/0.55
Now we only need to evaluate it in different values of x, and see for which value of x, the outcome y is also a whole number.
We will see that for x = 4, we have:
y = (4.35 - 4*0.40)/0.55 = 5
So you bought 4 buns and 5 cakes.
If you want to learn more about linear equations:
brainly.com/question/1884491
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It is any fraction except 0 of 180°.
For this case we have that by definition, the discriminant of a quadratic expression is given by:
If the discriminant is less than zero then the expression has two different complex roots.
In this case we have the following expression:
So we have to:
The discriminant is given by:
Then, if we want two complex roots it must be fulfilled that:
Thus, the expression has two complex roots for all values greater than 4.
ANswer:
