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mariarad [96]
3 years ago
5

Help me with this question please, giving 15 points.

Mathematics
1 answer:
Sunny_sXe [5.5K]3 years ago
4 0

Answer:

D.  108.25 sq in

Step-by-step explanation:

Area of triangle = bh/2

Area of bottom triangle = 4.3(5)/2 = 10.75

Area of a lateral triangle = 13(5)/2 = 32.5

Area of 3 lateral triangles = 3(32.5) = 97.5

Total surface area = 10.75 + 97.5 = 108.25

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ololo11 [35]
34 ,, hope this helps
8 0
3 years ago
Given that AB is a line segment and the angle a = 75°, work out the value of x.
Lapatulllka [165]

Answer:

x = 21

Step-by-step explanation:

given : angle a = 75

we need to find the value of x.

To find the value of x.

we know that it is a straight angle so the sum of angles on a line will be 180

3x + 2x + a = 180

5x + 75 = 180

5x = 180 - 75

5x = 105

x = 105/5

x = 21

8 0
3 years ago
Can someone help me with these? And with work?
Sergeeva-Olga [200]

Answer:

On #7.

Step-by-step explanation:

12(3+y)=5(2y+8)=

12y+36=10y+40=

12y-36=10y+40-36=

12y=10y+4=

12y-10y=4

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6 0
3 years ago
Read 2 more answers
Sum n=3 ^ infty (2n+5)<br>find the series shown​
Margarita [4]
<h3>Answer: Choice C) 11 + 13 + 15 + 17 + ...</h3>

=====================================================

Explanation:

We're adding terms in the form (2n+5)

The first term is when n = 3, so

2n+5 = 2*3+5 = 6+5 = 11

The next term is when n = 4, so

2n+5 = 2*4+5 = 8+5 = 13

The next term is when n = 5, so

2n+5 = 2*5+5 = 10+5 = 15

And so on

This means,

\displaystyle \sum_{n=3}^{\infty} (2n+5) = 11+13+15+17+\ldots

which matches with choice C. The three dots indicates the pattern goes on forever.

-------------------

Choice B does not have these dots, so that's why choice B is not the answer. If we replaced the infinity symbol with 7, then choice B would be the answer.

I.e,

\displaystyle \sum_{n=3}^{7} (2n+5) = 11+13+15+17+19

8 0
4 years ago
Subtract. Express your answer in lowest terms. 10 5/11 - 4 2/11
jolli1 [7]

Answer:

6 3/11

Step-by-step explanation:

Subtract the whole numbers: 10 - 4 = 6

Subtract the fractions: 5/11 - 2/11 = 3/11

10 5/11 - 4 2/11 = 6 3/11

8 0
3 years ago
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