We have three pythagoras:
4² + y² = z²
16² + y² = x²
x² + z² = 20²
Now let's think:
4² + y² = z²
y² = z² - 4²
16² + y² = x²
16² + z² - 4² = x²
x² + z² = 20²
16² + z²- 4² + z² = 20²
2z² = 20² - 16² + 4²
2z² = (2.10)² - (2^4)² + (2²)²
2z² = 2².10² - 2^8 + 2^4
z² = 2.10² - 2^7 + 2^3
z² = 200 - 128 + 8
z² = 208 - 128
z² = 80
z = √80
80 | 2
40 | 2
20 | 2
10 | 2
5 | 5
1
80 = 5.2^4
So
√80 = 4√5
z = 4√5
Answer:
The problem is represented by a division.
She lost 4 points for each missed question
Step-by-step explanation:
If Lina lost a total of 32 points in 8 questions weighted equally, to find out how many points she lost per question, we should divide the total number of points lost (32) by the number of questions she missed (8).
This will give us the number of points lost per each missed question:
Points lost per question =
So this is clearly a division problem.
Answer:
Well, this is a simple equation when you look at it. Obviously, the answer is Zero. No matter how you rearrange the equation, the answer shoud always be Zero
initial equation: 2+2–4?
Altered equations:
-4+2+2?
2–4+2?
it is always the same. If i were to draw a number line, every time you add two; move two to the right, everytime i subtract four; move 4 to the left. Try it, the answer will always be Zero.
There are also acronyms: BODMAS, BIDMAS, PEDMAS Et Cetera.
these are the order(s) of operations. Search it up. If one ever comes across an equation where all operations are equivalent then solve it from left to right.
Step-by-step explanation:
The answer is 0. Why? Because of the commutative property that basically says no matter what order the numbers are in you'll always yield the same answer. (3+2=5 and 2+3=5)
In this case, 2+2-4=0 because (2+2)=4 , and 4-4=0 because 4 and -4 are additive inverses.
2+2-4=0
4-4=0
0=0
Or
2+2-4=0
2+(-2)=0
2-2=0
0=0
Answer:
27 flowers
Step-by-step explanation:
Let
x ----> the number of roses
y ----> the number of carnations
z ----> the number of daisies
we know that
----> equation A
-----> equation B
-----> equation C
substitute the value of z in equation B
substitute the value of y in equation A
so
Rachel have 9 roses, 3 carnations and 15 daisies
In total
9+3+15=27 flowers