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kondor19780726 [428]
3 years ago
6

5.) Find the perimeter and area of a triangle with a base of 11 cm, height of 13.4 cm, and sides of 15

Mathematics
2 answers:
Sonbull [250]3 years ago
7 0

Answer:

Perimeter = 40cm

Area= 73.7  cm2

Step-by-step explanation:

Hi, to answer this question we have to:

Sum all the sides for the perimeter:

Perimeter = 11cm+ 15 cm +14 cm = 40cm

Apply the area of triangle formula for the area (A)

A = bh/2

Where

b = base  

h = height

Replacing with the values given

A = (11 x 13.4)/2

A = 147.4/2

A =73.7  cm2

Feel free to ask for more if needed or if you did not understand something.

adelina 88 [10]3 years ago
6 0

Perimeter is the sum of the 3 sides:

11 + 15 + 14 = 40 cm.

Area is 1/2 x height x base:

1/2 x 13.4 x 11 = 73.7 square cm.

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Holly bought a sweater on sale for 38% off the original price. If she saved $67, what was the original price?
Leya [2.2K]

Answer:

If she saved 30% off the original price which is the same as saying she saved $18.00.  

 

That means $18.00 is 30% of the original price.  

 

Let x be original price of the sweater

 

.3x = 18

x= 18/.3

 

x= $60.00

Step-by-step explanation:

8 0
2 years ago
Hector is flying a kite. He has let out 86 feet
Kaylis [27]

Answer:

Hector's kite is 61.84 feet from the ground.

Step-by-step explanation:

The angle of elevation of the kite is 42°15’30” when converted to decimals, it is 42.258333^{0} ≅ 42.26^{0}

Let the height of the kite to the horizontal of angle of elevation be represented as x. Applying the trigonometric function to the sketch of Hector's kite,

Sin θ = \frac{opposite}{hypotenus}

Sin 42.26^{0} = \frac{x}{86}

⇒ x = 86 x Sin 42.26^{0}

      = 86 x 0.6725

     = 57.835

x ≅ 57.84 feet

The height of Hector's kite from the ground = x + 4

                                    = 57.84 + 4

                                   = 61.84 feet

7 0
3 years ago
Please help, i forgot which was which... (positive or negative coefficient)
Vesna [10]
<h3>Answer:  Negative</h3>

Reason:

The template y = ax^2+bx+c applies to any quadratic to graph out a parabola. The coefficient for the x^2 term is 'a', and it solely determines whether the parabola opens upward or downward.

If 'a' is negative, then the parabola opens downward. The way to remember this is that 'a' being negative forms a negative frown.

On the other hand if 'a' is positive, then it forms a positive smile, and the parabola opens upward.

In this case, the points are fairly close to a parabola opening downward. This means 'a' is negative and a < 0.

8 0
1 year ago
The table below shows the numbers of students at 4 middle schools.
Naddik [55]

Answer:

(a) 300

(b)100

Step-by-step explanation:

(a) each figure is 100 student and there are 3 figures at Woodbridge so it's 3*100=300

(b) DuBois=3*100=300

Polk=4*100=400

400-300=100

7 0
3 years ago
How many proper subsets does the set T = {i, c, j, e} have?
Gala2k [10]
Number of proper subsets = 2^number of elements- 1
= 2^n - 1
No of elements = 4
2^4-1 = 16-1 = 15
5 0
3 years ago
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