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likoan [24]
4 years ago
13

Help and explain please

Mathematics
1 answer:
VARVARA [1.3K]4 years ago
6 0
The first answer is 108 square inches because 12×9=108 you take the l×w
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If x>2,then x2-x-6/x2-4=
statuscvo [17]
\frac{x^2-x-6}{x^2-4}=(*)\\------------\\x^2-x-6=0\\a=1;\ b=-1;\ c=-6\\\Delta=b^2-4ac;\ \Delta=(-1)^2-4\cdot1\cdot(-6)=1+24=25\\\\x_1=\frac{-b-\sqrt\Delta}{2a};\ x_2=\frac{-b+\sqrt\Delta}{2a}\\\\x_1=\frac{1-\sqrt{25}}{2\cdot1}=\frac{1-5}{2}=\frac{-4}{2}=-2\\\\x_2=\frac{1+\sqrt{25}}{2\cdot1}=\frac{1+5}{2}=\frac{6}{2}=3\\\\x^2-x-6=(x+2)(x-3)
---------------------\\x^2-4=x^2-2^2=(x-2)(x+2)\\-------------------\\\\(*)=\frac{(x+2)(x-3)}{(x-2)(x+2)}=\frac{x-3}{x-2}


6 0
4 years ago
During WW2, mortars were fired from trenches dug 4 feet in the ground. The mortars had an average velocity of 150 ft/s. What is
san4es73 [151]

uh...probably not very long

5 0
3 years ago
The straight lines passing through these pairs of points (2, 5) and (4, 7) ,(−4, 2) and (1, 7) are,
Taya2010 [7]

Answer:

The line passes (2, 5) and (4, 7) has slope:

S = (7 - 5)/(4 - 2) = 2/2 = 1

The line passes (1, 7) and (-4, 2) has slope:

S = (2 - 7)/(-4 - 4) = 5/-5 = -1

The multiplication of two slope is  1 x (-1) = -1

=> Two lines are perpendicular

Hope this helps!

:)

5 0
3 years ago
Read 2 more answers
daniel wants to build a sandbox that has a perimeter of 20.5 feet. the length is 5.25 feet. what is the width of their sandbox?
Pavlova-9 [17]
If you subtract 20.5 by 5.25 x 2 you will get 10 by 2 and you have the answer
8 0
2 years ago
Read 2 more answers
What’s the range cuz I can’t find it?
galben [10]
Add all the numbers together. And then divide by the answer you get!
5 0
3 years ago
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