The first one can be done by Pythagoras theorem such as
then
then
The second one can also done by Pythagoras theorem, note that this is isosceles triangle so
, again by using Pythagoras theorem
then
then
For the last one can also done by property of 30-60-90 triangle.
Answer:
5 cm
Step-by-step explanation:
The volume (V) of a cuboid is calculated as
V = lbh ( l is length, b is breadth and h is height )
Here l = 20, h = 12, V = 1200 and b is to be found, thus
20 × b × 12 = 1200, that is
240b = 1200 ( divide both sides by 240 )
b = 5
<span>Simplifying
2d + -5 = 17
Reorder the terms:
-5 + 2d = 17
Solving
-5 + 2d = 17
Solving for variable 'd'.
Move all terms containing d to the left, all other terms to the right.
Add '5' to each side of the equation.
-5 + 5 + 2d = 17 + 5
Combine like terms: -5 + 5 = 0
0 + 2d = 17 + 5
2d = 17 + 5
Combine like terms: 17 + 5 = 22
2d = 22
Divide each side by '2'.
d = 11
Simplifying
d = 11 </span>
Hello!
Lets go through each choice, and determine if it is correct.
So, the symbol ≤, means less than or equal to. So our answer must be less than -75 or -75 on the dot.
A: y = 75
Okay, so we can tell this one is wrong off the bat. 75 is much more than -75. (Make sure you notice the symbol!) So it cannot be equal to said answer. A is wrong.
B: y =-74
Another trick question! When you are in the negatives, less is more! So -74 is actually greater than -75. This is also incorrect!
C: y > -75
This one is straight forward. Our equation up top strictly says <em>less than or equal too</em>, while C says greater than. Incorrect!
D: y = -75
The last answer! We see that the symbol in our equation up top says less than or equal too, and y = -75 is equal. This is the correct answer.
Our correct answer is D: y = -75
<em>waffletowne</em>
