Well due to my calculations Tom should have gotten 311.5 dollars last week.
40×7=280
7÷2=3.5
9×3.5=31.5
31.5+280=311.5
Or You could do this
(40×7)+(3.5×9)=311.5
The square root of 25 because you get a whole number (five)
Answer:
Part 1) The price after the second discount is 187.85€
Part 2) The percentage of total variation is 27.75%
Step-by-step explanation:
The question in English is
In an appliance store, a refrigerator with a price of 260€ was discounted by 15%; after one month it was discounted by another 15%. What is the price after the second discount? What is the percentage of total variation?
Part 1)
<em>Find out the price after the second discount</em>
we know that
A) The first discount is equal to
260€(0.15)=39€
The price after the first discount is equal to
260€-39€=221€
B) The second discount is equal to
221€(0.15)=33.15€
The price after the second discount is equal to
221€-33.15€=187.85€
Part 2) Find out the percentage of total variation
we know that
The original price of 260€ represent the 100%
by using proportion
Find out the percentage that represent (260€-187.85€)=72.15€
We know that the parabola opens downwards because it has a negative leading coefficient.
<h3>
</h3><h3>
Why the parabola opens downwards?</h3>
For any polynomial, the leading coefficient is the coefficient in the term where is the large exponent of the polynomial.
The sign of that coefficient will determine the end behavior of the graph of the polynomial.
For the case of the parabola, a positive leading coefficient means that the parabola opens upwards, while a negative leading coefficient will mean that the parabola opens downwards.
Now, if you look at our parabola:
g(x) = -(x + 1)^2 - 3
You can see that there is a negative sign, thus when we expand the parenthesis, we will end up with a negative leading coefficient:
g(x) = -x^2 - 2x + 1 - 3 = -x^2 -2x - 2
So we know that the parabola opens downwards.
If you want to learn more about parabolas:
brainly.com/question/4061870
#SPJ1
what's the problem we have to solve?
you can use m a t h w a y to answer this question
