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3 years ago

What is the scale length of ABC to DEF?

Mathematics

1 answer:

nikdorinn [45]3 years ago

6 0

The scale length is 5. That’s what i got

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hi... um..im stuck withone question can anyone help me workout the surface area of a cube its height is 2cm only

azamat

Answer:

24cm²

Step-by-step explanation:

If its a cube all of the sides are the same length, therfeore the lenght and width would be the same as well. So the surface area would be 24(6 sides, 2x2 each).

8 0

3 years ago

You can just give an answer.

lina2011 [118]

Answer:

Step-by-step explanation: 50 x. 10

3 0

3 years ago

Which inequality has -25 in its solution set?

Anastaziya [24]

Answer:

The answer is Y+20> -30

Step-by-step explanation:

I took the test

4 0

3 years ago

Im giving 100 Points to anyone who could solve this for me please.

myrzilka [38]

Answer:

AB = 27.2

BC = 33.5

AC = 50.4

∠A = 38°

∠ABC = 112°

Step-by-step explanation:

<u>Trigonometric ratios</u>

$\sf \sin(\theta)=\dfrac{O}{H}\quad\cos(\theta)=\dfrac{A}{H}\quad\tan(\theta)=\dfrac{O}{A}$

where:

$\theta$ is the angle
O is the side opposite the angle
A is the side adjacent the angle
H is the hypotenuse (the side opposite the right angle)

$\implies \sf \cos(30^{\circ})=\dfrac{29}{BC}$

$\implies \sf BC=\dfrac{29}{\cos(30^{\circ})}$

$\implies \sf BC=\dfrac{58\sqrt{3}}{3}=33.5\:(nearest\:tenth)$

$\implies \sf \tan(30^{\circ})=\dfrac{BD}{29}$

$\implies \sf BD=29\tan(30^{\circ})$

$\implies \sf BD=\dfrac{29\sqrt{3}}{3}$

$\implies \sf \sin(38^{\circ})=\dfrac{BD}{AB}$

$\implies \sf AB=\dfrac{\dfrac{29\sqrt{3}}{3}}{\sin(38^{\circ})}$

$\implies \sf AB=27.2\:(nearest\:tenth)$

$\implies \sf \tan(38^{\circ})=\dfrac{BD}{AD}$

$\implies \sf AD=\dfrac{\dfrac{29\sqrt{3}}{3}}{\tan(38^{\circ})}$

$\implies \sf AD=21.4\:(nearest\:tenth)$

$\implies \sf AC=AD+DC=21.4+29=50.4$

The interior angles of a triangle sum to 180°

⇒ ∠A + 52° + 90° = 180°

⇒ ∠A = 180° - 90° - 52°

⇒ ∠A = 38°

⇒ ∠ABC + 38° + 30° = 180°

⇒ ∠ABC = 180° - 38° - 30°

⇒ ∠ABC = 112°

**I have checked the measures using a graphing programme - see attached**

8 0

2 years ago

Gerald notices that the bank of lockers outside his math classroom are numbered 511, 513, 515, ..., 575. Determine the number of

marysya [2.9K]

Answer:

Step-by-step explanation:

(575-511)/2 + 1 = 33

8 0

3 years ago

Read 2 more answers