9514 1404 393
Answer:
(x -y -1)(x +y)
Step-by-step explanation:
The expression can be factored by grouping.
x^2 -y^2 -x -y = (x^2 -y^2) -(x +y)
= (x -y)(x +y) -1(x +y)
= (x -y -1)(x +y)
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It is useful to know that a difference of squares is factored as ...
a^2 -b^2 = (a -b)(a +b)
Answer:
A. 21
Step-by-step explanation:
Use the trigonometric function for the tangent of an angle because the adjacent side of the right-angled triangle is provided in the question, whilst the opposite side is x.
tan = opposite / adjacent
tan 60° = x / 7 * sqrt(3)
Now make x the subject of the equation.
x = tan 60° * 7 * sqrt(3)
x = 21
When multiplying, take into consideration all the digits on your calculator display.
Hope this helped!
Answer:
20%
20=4
32=6.4
54=10.8
88=17.6
120=24
25%
20=5
32=8
54=13.5
88=22
120=30
30%
20=6
32=9.6
54=16.2
88=26.4
120=36
75%
20=15
32=24
54=40.5
88=66
120=90
120%
20=24
32=38.4
54=64.8
88=105.6
120=144
Step-by-step explanation:
Go to a percentage calculator to check if this isn't enough.
60 subs
Because it’s 15 per 45 and 45 times 4 is 180 which means that in 3 hours or 180 minutes they sold 15 times 4 amount of subs and 15 times four is 60. Hope this helps. Sorry if the explanation isn’t that good
Use given half-life for C-14 of 5,730 years.
The exponential decay function:
plug in half life, solve for 'e^(-k)'
Sub into original decay function, plug in 0.51 for 'y' and solve for 't'
