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zzz [600]
3 years ago
5

Three and three fourths minus one and two fourths equals

Mathematics
1 answer:
NikAS [45]3 years ago
3 0

Answer:

d. two and one fourth

Step-by-step explanation:

3 3/4 - 1 2/4 = 2 1/4

2 1/4

i hope this helps! have a wonderful rest of ur day :)

and if its not too much to ask could you mark me as brainliest pls

im trying to rank up and i only need 1 more, if not its ok! ty and let me know if you need help with anything else!!

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Solve using law of sines or law of cosines!
malfutka [58]

Answer:

Part 5) The length of the ski lift is 1.15\ miles

Part 6) The height of the tree is 18.12 m

Step-by-step explanation:

Part 5)

Let

A -----> Beginning of the ski lift

B -----> Top of the mountain

C -----> Base of mountain

we have

b=0.75\ miles

A=20\°

C=180\°-50\°=130\° ----> by supplementary angles

Find the measure of angle B

Remember that the sum of the interior angles must be equal to 180 degrees

B=180\°-A-C

substitute

B=180\°-20\°-130\°=30\°

Applying the law of sines

\frac{b}{sin(B)}=\frac{c}{sin(C)}

substitute

\frac{0.75}{sin(30\°)}=\frac{c}{sin(130\°)}

c=\frac{0.75}{sin(30\°)}(sin(130\°))

c=1.15\ miles

Par 6)

see the attached figure with letters to better understand the problem

<u><em>Applying the law of sines in the right triangle BDC</em></u>

In the right  triangle BDC 20 degrees is the complement of 70 degrees

\frac{BC}{sin(70\°)}=\frac{x}{sin(20\°)}

BC=(sin(70\°))\frac{x}{sin(20\°)} -----> equation A

<u><em>Applying the law of sines in the right triangle ABC</em></u>

In the right  triangle ABC 50 degrees is the complement of 40 degrees

\frac{BC}{sin(40\°)}=\frac{x+15}{sin(50\°)}

BC=(sin(40\°))\frac{x+15}{sin(50\°)} -----> equation B

Equate equation A and equation B and solve for x

(sin(70\°))\frac{x}{sin(20\°)}=(sin(40\°))\frac{x+15}{sin(50\°)}\\\\2.7475x=0.8391(x+15)\\\\2.7475x=0.8391x+12.5865\\\\2.7475x-0.8391x=12.5865\\\\x=6.60\ m

<u><em>Find the value of BC</em></u>

BC=(sin(70\°))\frac{6.6}{sin(20\°)}

BC=18.12\ m

therefore

The height of the tree is 18.12 m

5 0
4 years ago
Place the indicated product in the proper location on the grid. (a+b-c)(a+b+c)
aliina [53]

Answer:

The required location on the gird is shown below.

Step-by-step explanation:

Consider the provided expression.

We need to place the indicated product in the proper location on the grid.

First open the parenthesis as shown:

(a+b-c)(a+b+c)=a(a+b+c)+b(a+b+c)-c(a+b+c)

(a+b-c)(a+b+c)=a^2+ab+ac+ab+b^2+bc-ac-bc-c^2

Now add the like terms as shown:

(a+b-c)(a+b+c)=a^2+b^2-c^2+2ab

Hence, the required location on the gird is (a+b-c)(a+b+c)=a^2+b^2-c^2+2ab

3 0
3 years ago
Could somone help me on this MAD question
olga_2 [115]

The mean absolute deviation of the set of numbers is 5/4

<h3>How to determine the mean absolute deviation?</h3>

The set of numbers is given as:

1 1/2, 0, 4 and 2 1/2

Rewrite the set of numbers as:

1.5, 0, 4 and 2.5

Calculate the mean of the set using:

\bar x = Sum/Count

So, we have:

\bar x = (1.5 + 0 + 4 + 2.5)/4

Evaluate

\bar x = 2

The mean absolute deviation is then calculated as:

M.A.D = 1/n * ∑|x - \bar x|

So, we have:

M.A.D = 1/4 * [|1.5 - 2| + |0 - 2| + |4 - 2| + |2.5 - 2|]

Evaluate the absolute difference

M.A.D = 1/4 * [0.5 + 2 + 2 + 0.5]

Evaluate the sum

M.A.D = 1/4 * 5

Evaluate the product

M.A.D = 5/4

Hence, the mean absolute deviation of the set of numbers is 5/4

Read more about mean absolute deviation at

brainly.com/question/9495630

#SPJ1

3 0
2 years ago
The United States Air Force has 19 woman for every 81 men enlisted. If a squadron has 700 members, approximately how many are me
vodomira [7]

Answer:567

Step-by-step explanation:

Proportion is 81/100=x/700

100 times 7 is 700 and 81 times 7 is 567

6 0
3 years ago
A camera has a listed price of SB78.99 before tax. If the sales tax rate is 6.25%, find the total cost of the camera with sales
lawyer [7]
The answer is 79.05 because 78.99* 6.25%
6.25%=0.0625
3 0
3 years ago
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