Answer:
A) 
B) T = -5 °C
Step-by-step explanation:
A) Let T be the change in temperature of the week. T is determined as the total temperature change (-20°C) divided by the number of weeks that have passed (4 weeks). The expression is:
B) In order to simplify the expression, simply perform the division.
This means that the temperature has dropped by 5 degrees each week.
45% of $432= 432.45%=194.4
$194.4
Answer: y = 63/x
Step-by-step explanation:
This is variation, now to the question.
y <> 1/x --------------------1
the <> is called the constant of proportionality, which will now be replaced by a constant (k)
y = k/x ------------------- 2
Given that y = 7 and x = 9, we now find k , then use it to form an equation to connect y and x.
Back to 2
7 = k/9, therefore
K = 63. Now put thus back in equation 2
y = 63
---
x
Therefore, the equation connecting y and x is
y = 63/x.
What I did to start with was to find the lowest number that both 12 and 10 could divide into, that number is 60.
I know 60 divided by 12 is 5 and I know that 60 divided by 10 is six.
Then I took 5 and multiplied it by 3 and got 15. I did this step because you need 5 packages of cups and each package cost 3 dollars.
Next I took 6 and multiplied it by 5 and got 30. I did this step because you need 6 packages of plates and each package cost 5 dollars.
You would then take 30 dollars and 15 dollars and add them together to get your total.
The answer is 42 dollars.
Step-by-step explanation:
if there are no typos then only 1) is correct.
3x² + 2x² = 5x²
x + 7x = 8x
2 = 2
2)
8x² - 3x² = 5x²
4x - 3x = x
4 = 4
wrong
3)
x² + 5x² = 6x²
12x - 4x = 8x
2 = 2
wrong
4)
is the same as 3)
so, I am sure the original problem description has something else here. be careful - the original might be another correct answer here.
