# Examine each capital letter in the alphabet. Determine which letters have 180° rotational symmetry about a point in the center of the letter

H, I, N, O, S, X, Z

Step-by-step explanation:

All of the letters above look the same when rotated 180 degrees about a point in the center.

## Related Questions

If you need a 1,300 square foot rental house painted, how much should the painter charge you to paint that house?

The painter should charge you \$3,250 to paint that house.

Missing info:
A painter charges by the square foot and charges you \$1,875 to paint a 750 square foot rental house.

y = kx
y = total payment to painter
x = number of square foot painted
k = unit price of 1 square foot painted

Given: y = 1875 ; x = 750 ; k = ?
k = y / x ⇒ k = 1875/750 ⇒ k = 2.50 per sq. ft

y = ? ; x = 1300 ; k = 2.5
y = kx
y = 2.5 * 1300
y = 3,250

A collection of quarters and nickels is worth \$14.80. There are 88 coins in all. How many of each coin are there?

Let x and y be the number of quarters and nickels.

We have x+ y= 88 (because there are 88 coins in total)
⇒ y= 88-x

On the other hand, we have: 25 cents*x+ 5 cents*y= 1,480 cents (\$14.80= 1,480 cents)
⇒ 25x+ 5y= 1,480 (1)

Plug y= 88-x in (1), we have:
25x+ 5(88-x)= 1,480
⇒ ...
⇒ x= 52.

y= 88-52= 36

There are 52 quarters and 36 nickels~

PLEAS HELP ASAP PLEAS 20 points
1 over 3b = 4 over 5. what equals b in this equation?

b = 5/12

Step-by-step explanation:

You have the proportion

1/(3b) = 4/5

Cross multiply to get rid of the fractions...

5 = 12b                now solve for b

5/12 = b                 (divide by 12 on both sides)

Find the probability​ p(e or​ f) if e and f are mutually​ exclusive, ​p(e)equals 0.25​, and ​p(f)equals 0.51.

The definition of two events being mutually exclusive (or disjoint) only means that it is not possible for the two events to occur together. Given two events, E and F, they are mutually exclusive and also mean independent.

In this case, since events E and F are mutually exclusive, therefore the probability that either E or F will occur will simply be the sum of two events.

P (E or F) = P (E) + P (F)

P (E or F) = 0.25 + 0.51

P (E or F) = 0.76

Therefore this means that there is a 76% probability that either E or F will occur.