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ratelena [41]
4 years ago
10

PLEEEEEASE HELP MEEE!!!

Mathematics
1 answer:
Leya [2.2K]4 years ago
5 0

Answer:

The first amount is larger by 25%.

Step-by-step explanation:

To start, let's first increase a by 50% of a, or a/2. We will get 3a/2. Now, we decrease it by 50% of 3a/2, or just half 3a/2 to get 3a/4. This means the first amount is larger by (a - 3a/4)/a or (a/4)/a=1/4=25%.

Note: To increase a number by x%, we can just multiply it by (100+x)/100, and to decrease a number by x%, we can just multiply it by (100-x)/100.

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You are measuring the height of a statue. You stand 10 feet from the base of the statue. You measure the angle of elevation from
Akimi4 [234]

Answer:

h = (10 ft)(4.01) = 40.1 ft

Step-by-step explanation:

The tangent function relates this elevation to the horizontal distance (10 ft) and the angle of elevation (76 degrees):

                               opp           h

tan 76 degrees = --------- = ------------- = 4.01

                                adj         10 ft

Therefore , h = (10 ft)(4.01) = 40.1 ft

5 0
4 years ago
Read 2 more answers
Find the values of the pronumerals in this diagram. Write down the reason in each case.
timofeeve [1]

Answer:

see explanation

Step-by-step explanation:

a and 85 form a straight angle and are supplementary, thus

a + 85 = 180 ( subtract 85 from both sides )

a = 95

b and 85 are vertical angles and are congruent, thus

b = 85

c and 85 are corresponding angles and congruent, thus

c = 85

c and d are vertical angles and congruent, thus

d = 85

In conclusion

a = 95, b = 85, c = 85, d = 85

5 0
3 years ago
What is the surface area of the sides and closed rectangular end? ____ sq. ft.
Alenkasestr [34]
Without the roof panels, the surface area (except for the open panel) is 176.25 sq. ft.
With the roof panels, the surface area (except for the open panel) is 196.67 sq. ft. 

The area of the rectangular sections (the sides without gables) is given by 10*6 = 60 sq. ft.  There are two of these sides, for a total of 2*60 = 120 sq. ft.

The gables are triangles, which have an area formula of
A = 1/2bh

For the gables, this is 1/2(1.5)(7.5) = 5.625 sq. ft.  Since there are two of them, this makes 2*5.625 = 11.25 sq. ft.

The closed side under a gable has an area of 6*7.5 = 45 sq. ft.

The two roof panels have an area of (4 1/12)(2 1/2) each:
49/12(5/2) = 245/24

There are two of them, which makes 490/24 = 20.42 sq. ft.

Without the roof panels, we have 45+11.25+120 = 176.25 sq. ft.
With the roof panels, we have 45+11.25+120+20.42 = 196.67 sq. ft.
4 0
4 years ago
Can someone plz check over my answers. It's urgent, thx!
liraira [26]

Answer:

their alright but the last one is the second one

Step-by-step explanation:

7 0
3 years ago
The graph of y=3x is shown. What is the value of x when y=27?
pishuonlain [190]
The answer is c
it is since you would put 3x = 27
then divide 3 by 27 which equals 9!
7 0
3 years ago
Read 2 more answers
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