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lisabon 2012 [21]
3 years ago
6

What is the value of this expression 15−5

Mathematics
1 answer:
TEA [102]3 years ago
4 0

Answer:

sumbody help this man plz

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What are the measures of the angles in triangle ABC?
VMariaS [17]

Complete question :

A right triangle has side lengths AC = 7 inches, BC = 24 inches, and AB = 25 inches.

What are the measures of the angles in triangle ABC?

a) m∠A ≈ 46.2°, m∠B ≈ 43.8°, m∠C ≈ 90°

b) m∠A ≈ 73.0°, m∠B ≈ 17.0°, m∠C ≈ 90°

c) m∠A ≈ 73.7°, m∠B ≈ 16.3°, m∠C ≈ 90°

d) m∠A ≈ 74.4°, m∠B ≈ 15.6°, m∠C ≈ 90°

Answer:

c) m∠A ≈ 73.7°, m∠B ≈ 16.3°, m∠C ≈ 90°

Step-by-step explanation:

Given:

Length AC = 7 inches

Length BC = 24 inches

Length AB = 25 inches

Since it is a right angle triangle,

m∠C = 90°

To find the measures of the angle in ∠A and ∠B, we have :

For ∠A:

SinA = \frac{BC}{AB}

SinA = \frac{24}{25}

SinA = 0.96

A = Sin^-^1 = 0.96

∠A = 73.7°

For ∠B:

SinB = \frac{AC}{AB}

SinB = \frac{7}{25}

SinB = 0.28

B = Sin^-^1 = 0.96

∠B = 16.26 ≈ 16.3°

Therefore,

m∠A = 73.7°

m∠B = 16.3°

m∠C = 90°

7 0
3 years ago
Read 2 more answers
Which best describes the relationship between the line that passes through the points (1, –6) and (3, –2) and the line that pass
Setler [38]
Both lines are parallel, since they have the same slope of 2.
8 0
3 years ago
A parabola can be drawn given a focus of (1, -7) and a directrix of y = 1. Write the
Paha777 [63]

Answer:

Step-by-step explanation:

focus (1 , -7)  ⇒ a = 1  & b = -7

y = 1 ⇒ c = 1

Equation of parabola :

(x - a)² + (y - b)² = (y - c)²

(X - 1)² + (y + 7)² = (y - 1)²

Now, expand.

x² - 2x + 1 + y² + 2*7*y + 7² = y² - 2*y*1 + 1

x² - 2x + 1 + y² - 14y + 49 = y² - 2y +1

x² - 2x + 1 + y² - 14y +  49  - y² + 2y - 1 = 0

x² - 2x  + <u>y² - y²</u>   <u> - 14y + 2y</u>   <u>+ 1 + 49 - 1 </u>= 0

x² - 2x  - 12y + 49 = 0

7 0
3 years ago
In AABC, what is the value of cos B?<br>A. 5/13 B. 12/13 C. 5/12 D. 13/12​
Zielflug [23.3K]

Answer:

Option B ⇒ \frac{12}{13}

Step-by-step explanation:

Cos B = adjacent/hypotenuse

adjacent = 12

hypotenuse = 13

∴ cos B = 12/13

The answer is option B

3 0
4 years ago
-3(x-a)+b=c<br> solve for x
Masja [62]
X=a+1/3b+-1/3c. Hope this helps ;)
4 0
4 years ago
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