Let x be the number of $20 bills.
$20x will then be the amount of money that the $20 bills make up.
$5(x + 5) will then be the amount of money that the $5 bills make up, since there are 5 more $5 bills than $20 bills.
$275 = $20x + $5(x + 5)
{Expand the equation}
$275 = $20x + $5x + $25
{Subtract both sides of equation by $25}
$275 - $25 = $20x + $5x
$250 = $25x
$25x = $250
{Make x the subject of equation}
x = $250 ÷ $25
{Dollar symbols cancel out}
x = 10
Thus, there are 10 $20 bills.
Then, number of $5 bills is:
x + 5
= 10 + 5
= 15
There are 15 $5 bills.
Hope this helps! :)
I think t = 11:
42 - 35 = 8 - 12 + t
7 = 8 - 12 + t
7 = -4 + t
7 + 4 = t
11 = t
Im sorry if this is wrong
Answer/Step-by-step explanation:
a. Using two points on the line (0, 2) and (4, 12), find the gradient:
Gradient = ∆y/∆x = (12 - 2) / (4 - 0) = 10/4 = 2.5
Gradient = 2.5
b. The gradient, 2.5, represents the unit rate. That is, the volume of the oil in the tank per second.
i.e. 2.5 litres per second
c. The value, L = 2 represents the y-intercept, which is the starting value or initial volume of oil in the tank at 0 secs.
When putting numbers into scientific notation, always put the decimal after the ones place. In this case, you would put the decimal after 4 and before 5 (in between). From there, you count how many decimal places you moved in order to change it into that form.
0.45013 would change to 4.5013 and you would have to multiply it by 10 to the negative power of 1 (you're only moving back one place).
4.5013 x 10^-1
Hope this helps :)
In the first attachment your answer is A.
In the second attachment your answer is D.
In the third attachment your answer is D.
In the fourth attachment your answer is 90cm
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