Answer:
not really
Step-by-step explanation:
because on the first equation you subtract 5and take to y as a negative and in the second equation 5 goes as a positive at least that is what i think
we know that
In a right triangle
the value of the cosine is equal to
and the value of the sine is equal to
so
<u>First case</u>
substitute
therefore
The first case is the solution
<u>Second case</u>
substitute
therefore
The second case is not the solution
<u>Third case</u>
<u>Note The hypotenuse cannot be smaller than the adjacent leg or the opposite leg. This problem has errors </u>
substitute
therefore
The third case is not the solution
the solution is the first case
see the attached figure
Answer:
6000 square millimeters
Step-by-step explanation:
Side length of the slanting side can be calculated using the Pythagorean theorem,
L = sqrt(30^2+40^2) = 50
sufrace area of a triangular prism
= surface area of the end sections + the surface area of the three side faces
= 2*(30*40/2) + 40*(30+40+50)
= 1200 + 4800
= 6000 mm^2
Hi!
When adding and subtracting negative numbers, just imagine a number line.
For example, let's say we're adding 3 + -7.
Tip: Adding negative numbers is the same as subtracting positive numbers. So 3 + -7 is the same as 3 - 7.
Here's a numberline:
-10, -9, -8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5
Now add 3 to negative 7. (or subtract 7 from 3)
-10, -9, -8, -7<em>, -6, -5, </em><em>-4</em><em>, -3, -2, -1, 0, 1, 2</em>, 3, 4, 5
3 + -7 = -4
Let's try subtracting now. How do we solve 5 - (-3)?
Tip: Subtracting a negative is the same as adding a positive. So 5 - (-3) is the same as 5 + 3. Another way of thinking of it, is two minuses make a positive.
Numberline:
-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5
Subtract -3 from 5. (or add 12 to 5)
-5, -4, -3, <em>-2, -1, 0, 1, 2, 3, 4, </em>5<em>, 6, 7, 8</em>, 9, 10
Here are a few more examples.
-7 + -3 (which is the same as -7 - 3) = -10
-8 + 6 = -2
-9 - (-8) (which is the same as -9 + 8) = -1
-9 - 3 = -12
Hope this helps! :)
This is helpful at grocery store and stuff
495+254=400+90+5+200+50+4=
400+200+90+50+5+4=
600+140+9=
600+100+40+9=
700+40+9=
749