Answer:
scale factor = 1/2
Step-by-step explanation:
for AC: 4 + 4 = 8
8 is the AC of the red triangle
4 is the AC of the blue triangle
to get from 8 to 4, we divide by 2 or multiply by 1/2 (they mean the same thing)
10 is the CB of the red triangle
5 is the CB of the blue triangle
to get from 10 to 5, we divide by 2 or multiply by 1/2
Represent these consecutive numbers (assuming that they are all integers):
x
x+1
x+2
x+3
x+4
x+5
and so on
x+8
x+9 is the tenth number. x+9 = 10, so x = 9.
Think of it this way: there are 10 consecutive numbers, and the last one is 10.
Working backwards, we get the sequence 10, 9, ... 3, 2, 1.
The sum of such an arith sequence is equal to the count of the numbers times the average of the first and last terms:
sum here = 10(1+10)/2 = 5(11) = 55 (answer)
Answer:
C
Step-by-step explanation:
Test Numbers with each equation or Simplify
Simplified, C's equation equates to 0 which would make it infinite
Answer:
Choice B: Only (-2, 9)
Step-by-step explanation:
Of the two choices, only the point (-2, 9) satisfies the equation:
... y = -2x +5
... 9 = -2(-2) +5 = 4 +5 = 9
Answer:
![2.16 \times {10}^{ - 4}](https://tex.z-dn.net/?f=2.16%20%5Ctimes%20%20%7B10%7D%5E%7B%20-%204%7D%20)
Step-by-step explanation:
The lab technician is dividing a cell that has a diameter of
![4 .32 \times {10}^{ - 4}](https://tex.z-dn.net/?f=4%20.32%20%5Ctimes%20%20%7B10%7D%5E%7B%20-%204%7D%20)
The new cells has a diameter that is half of the diameter of the original cell.
The diameter of the new cell is given as:
![\frac{4.32 \times {10}^{ - 4} }{2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B4.32%20%5Ctimes%20%20%7B10%7D%5E%7B%20-%204%7D%20%7D%7B2%7D%20)
Rewrite the numerator in standard notation:
![\frac{0.000432}{2}](https://tex.z-dn.net/?f=%20%5Cfrac%7B0.000432%7D%7B2%7D%20)
![= 0.00216](https://tex.z-dn.net/?f=%20%3D%200.00216)
We rewrite in scientific notation to obtain:
![2.16 \times {10}^{ - 4}](https://tex.z-dn.net/?f=2.16%20%5Ctimes%20%20%7B10%7D%5E%7B%20-%204%7D%20)