This one can besolved using system of equations. From the first statement we can assume that
length = 2 * width. The area of rectange equals product of it's width and length. By knowing that and following to the second statement we get the second equation:
(3 * width) * (length - 5) = width * length + 4. Let's mark the
width as
x and the
length as
y and write down our equations system:
Using substituion method, lets replace every
y with
2x within second equation and solve it:
Now lets find the discriminant in order to solve this quadratic equation:
The second root is negative, so we ignore it as
x represents width which can't be negative.
Now, using found root, let's find
y value from the first equation:
So,
the width is equal 4 (and the length is equal 8).
Your answer is A. 7.2x10^-5
Answer:
3.5(11) means 3.5 times 11? in that case
Step-by-step explanation:
first one roughly = 35+19+16....then you can see 77 is the closest, even without calcatulor
second one precisely==20+33+5+38.....then you can see that 90 is roughly the closest one, again even without to add those 4 togetherly precisely
Let's solve your inequality step-by-step.
−x−3<13+3x
Step 1: Simplify both sides of the inequality.
−x−3<3x+13
Step 2: Subtract 3x from both sides.
−x−3−3x<3x+13−3x
−4x−3<13
Step 3: Add 3 to both sides.
−4x−3+3<13+3
−4x<16
Step 4: Divide both sides by -4.
−4x
−4
<
16
−4
x>−4