So I will use the example of
200
×
20
-------
so what you would do would be so an easier way and fastest way is just put all zeros aside and and when you do you have 2 twos so 2×2=4 so then you get 4 and add all zero u took away which you took 3 zeros so 200×20=4,000
Answer: x = -8 ; y = -6
Step-by-step explanation:
1*x-2*y=4
1*x = 4 + 2*y
x = 4 + 2*y
Now you replace the value of x on the following equation:
-1*x+10*y=8
-1*(4 + 2*y) = 8
-4 - 2*y = 8
-2*y = 8+4
-2*y = 12
y = -12/2
y = -6
You replace the value of y in the previous equation:
x = 4 + 2*y
x = 4 + 2*(-6)
x = 4 - 12
x = -8
Answer:
D. Shari is standing 50 feet from a tree that is 100 feet tall. what is the distance between Shari’s foot and the top of the tree
Step-by-step explanation:
When we want to calculate the distance between Shari’s foot and the top of the tree, we apply the Pythagorean Theorem as follows.
Recall, there is always a plum/minus sign before the square root symbol. This is as a result of the fact that:
However, since we are looking for distance, we ignore the negative sign by making use of the absolute sign.
The correct option is D
In miles 365 million miles or 365,000,000
in km, 588 million km or 588,000,000
so
scientific notation=(number less than 10 and greater than or equal to 1) times 10^n
so
we need to move the decimal point 8 spaces to the left
to compensiate for that, we multiply by 10⁸ which will move it 8 to the right
so
365,000,000 mi=3.65 times 10⁸ mi
588,000,000 km=5.88 times 10⁸ km
those are the distances in scientific notation
