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Sphinxa [80]
3 years ago
13

3/4 − 2/5 in a fraction

Mathematics
2 answers:
Dennis_Churaev [7]3 years ago
6 0

Answer:

7/10

Step-by-step explanation:

Rzqust [24]3 years ago
4 0

Answer:

0.35

Step-by-step:

\frac{3}{4} - \frac{2}{5} =  \frac{3 \times 5}{4 \times 5} - \frac{2 \times 4}{5 \times 4} =  \frac{15}{20} -   \frac{8}{20} =  \frac{15 - 8}{20} =  \frac{7}{20} = 0.35

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In triangle ABC, angle = 90 degrees. AC = 7, BC = 12. AB = _______ Measure of angle A = _______ Measure of angle B = _______
Ulleksa [173]

Answer:

AB = 13.89

Measure of angle A = 59.74°

Measure of angle B = 30.26°

Step-by-step explanation:

The given parameters are;

∠C = 90°

AC = 7

BC = 12

Part 1

Hence, the question has the dimensions of the two adjacent sides of the right angle (angle 90°)

From Pythagoras theorem, we have;

A² = B² + C²

Where, A is the opposite side to the right angle, hence;

In the ΔABC,

AB ≡ A

Therefore;

AB² = AC² + BC² = 7² + 12² = 193

∴ AB = √193 = 13.89

Part 2

∠A is the side opposite side BC such that by trigonometric ratios

tan \angle A = \frac{Opposite \, side \,  to \,  angle \,  A}{Adjacent  \,  side  \, to  \, angle \,  A}  = \frac{BC}{AC} = \frac{12}{7} = 1.714

∴ ∠A = Arctan(1.714) or tan⁻¹(1.714) = 59.74°

Part 3

∠B is found from knowing that the sum of the angles in a triangle = 180°

∴ ∠A + ∠B + ∠C = 180° which gives

59.74° + 90° + ∠B = 180°

Hence, ∠B = 180° - (59.74° + 90°) = 180° - 149.74° = 30.26°.

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2.18 that will be ur answer
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At a school with 100 students, 40 students are taking Arabic, 35 Bulgarian, and 25
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How do I find B in y=mx+b?
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If you already have an equation, all you have to do is locate the slope and look after it. But if it's in a graph, it's where the line is crossing the y-axis.

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y=mx+b
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Walter used the iterative process to determine that 13 is between 3.61 and 3.62.
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Answer: no both, 3.61^2 and 3.62^2 are greater than 13

Step-by-step explanation:

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