Ok, so oriiginal+tax
if tax is in %, remember that x%=x/100
example, first one
1. tax is 5%, so we find 5% of 1.95 which is 0.05 times 1.95 which is .0975 or about 10 cents so total is 1.95
but wait, we found a shortcut
1(1.95)+0.05(1.95)=original+tax
we can undistribute the 1.95
1.95(1+0.05)=original+tax
so therfor we conclude that
oriignalprice(1+taxindecimal)=sale price
neato
1. sale price=1.95(1.05)=$2.0475 or about $2.05
2. sale price=58.50(1.01)=$61.425 or about $61.43
3. sale price=49.45(1.02)=$50.439 or about $50.44
4. sale price=58.50(1.01)=$61.425 or about $61.43
5. sale price=2500.00(1.01)=$2525.005.
6. sale price=50.00(1.02)=$51.00
7. sale price=149.50(1.02)=$152.49
8. sale price=2800.00(1.01)=$2828.00
9. sale price=2000.00(1.06)=$2120.00
10. sale price=9.50(1.06)=$10.07
11. sale price=4.95(1.05)=$5.1975 or about $5.20
12. sale price=50.00(1.06)=$53.00
13. sale price=299.95(1.06)=$317.947 or about $317.95
So austraia times x=africa=(4.32*10^14)x=6.582*10^14
to find x, we divde both sides by (4.32*10^14) so
x=(6.582*10^14)/(4.32*10^14)
we know that the exponents will cancel out {([10^14]/[10^14])=1} so
x=6.582/4.32
if you do this on a calculator you get
6.582/4.32=1.5=x
so autralia times 1.5=africa
I and III are always true: the diagonals of a rectangle are congruent, and they intersect at their midpoint.
Finally, the diagonals are perpendicular if and only if the rectangle is actually a square.
So, I and III are true for every rectangle, while II is true only for some rectangles.
Answer:
y = 2
Step-by-step explanation: