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bixtya [17]
3 years ago
7

Estimate the sum 11 3/8 + 9 7/10 + 21 1/4 by rounding each mixed number to the nearest whole number. Then find the exact sum

Mathematics
1 answer:
vodka [1.7K]3 years ago
3 0
Answer:
Approximately 42.
Exact sum is 42 13/40.

Explanation:
Estimate 11 3/8: 11
Estimate 9 7/10: 10
Estimate 21 1/4: 21
Add them together: 42.

11.375 + 9.7 + 21.25 = 42.325
I made them into decimals and then will convert it into fraction.
42.325 = 42 13/40

Hope this helps!
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Explain the connection between ∠2 and ∠B.
liraira [26]

Answer:

∠2 ≅ ∠B

Step-by-step explanation:

Let the triangle be ABC,

Given that,

∠A = 50°

∠C = 65°

Using angle-sum property of the triangle,

∠A + ∠B + ∠C = 180°

50° + ∠B  + 65° = 180°

∵ ∠B = 65°         ...(i)

A.T.Q.

Two horizontal lines are extended making 3 angles. Two angles out of them are 50° and 65°.

Since the adjacent angles comprising a straight line is equals to 180°.

so,

∠2 + 50° + 65° = 180°

∠2 + 115° = 180°

∠2 = 180° - 115°

∵ ∠2 = 65°   ...(ii)

Using (i) and (ii),

∠2 ≅ ∠B

Therefore, ∠2 and ∠B are congruent to one another.

7 0
3 years ago
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Need math help pls!!
SVEN [57.7K]

Answer:

32

Step-by-step explanation:

The facts we have are the height of the small lighthouse is 8, and the base is 2.5. The base of the big lighthouse is 10.

The factor between the base of the big lighthouse and small lighthouse is 4 (10/2.5).

If we apply this to the height, 8x4 = 32

4 0
3 years ago
Use the equations to find the perimeter equation
Law Incorporation [45]

The perimeter of the park is 3x^2 + 37x - 4

<h3>How to determine the perimeter?</h3>

The side lengths of the triangular park are:

10x + 3x^2 - 8, 12x and 15x + 4

Add these sides to determine the perimeter

P = 10x + 3x^2 - 8 + 12x + 15x + 4

Collect the like terms

P = 3x^2 + 10x + 12x + 15x - 8 + 4

Evaluate the sum

P = 3x^2 + 37x - 4

Hence, the perimeter of the park is 3x^2 + 37x - 4

Read more about perimeter at:

brainly.com/question/24571594

#SPJ1

6 0
2 years ago
I NEED HELP ASAP. BEFORE 4:00
sineoko [7]

Answer:

The measure of x = 45 degrees

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3 years ago
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NEED HELP I SUCK AT GEOMETRY (OFFERING 100POINTS)!!! best answer get brainlest
Andrej [43]

Answer:

g = 3.5

f = 78°

<u>Finding</u><u> </u><u>g</u><u>:</u>

25 is parallel to 8g - 3, so they are equal to each other.

25 = 8g - 3

28 = 8g

g = 3.5

<u>Finding</u><u> </u><u>f</u><u>:</u>

72° create a sum of 180° when adding to (f + 30) because they are supplementary.

72 + f + 30 = 180°

102 + f = 180°

f = 78°

Hope this helps!

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2 years ago
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