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3 years ago

Help with this one please do

Mathematics

1 answer:

vaieri [72.5K]3 years ago

5 0

Question 1 - 37 students took the test

Question 2 - 16 students scored between 20 and 40 points

- Ari -

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How to make 155 using 3 prime numbers(You must multiply)

Citrus2011 [14]

5 is a prime factor of 155. Dividing 155 by 5, we get 31. 1*5*31 = 155.

7 0

3 years ago

Help please! absolute value equations!

Bas_tet [7]

Answer:

n = -1 n = -7

Step-by-step explanation:

5| 2n+8| +3 = 33

Subtract 3 from each side

5| 2n+8| +3-3 = 33-3

5| 2n+8| = 30

Divide by 5

5/5| 2n+8| = 30/5

| 2n+8| = 6

An absolute value equation has two solutions, one positive and one negative

2n+8 = 6 2n+8 = -6

Subtract 8 from each side

2n+8-8=6-8 2n+8-8 = -6-8

2n = -2 2n = -14

Divide by 2

2n/2 = -2/2 2n/2 = -14/2

n = -1 n = -7

3 0

3 years ago

Help help help help help help

Keith_Richards [23]

Answer:

Solution,

or,125°=5x+30°[Being vertically opposite angles]

or,125°-30°=5x

or,95°=5x

or,x=95°/5

Hence,x=19°

Step-by-step explanation:

3 0

2 years ago

An isosceles triangle has angle measure 40, 40, and 100. The side across from the 100 angle is 10 inches long. How long are the

Alinara [238K]

Answer:

The other two sides of given isosceles triangle are 6.53 inches long.

Step-by-step explanation:

in the figure below,

ABC is an isosceles triangle has angle measure 40, 40, and 100. The side across from the 100 angle is 10 inches long an let this side be b

Let the other two be a inches long .

We have to find the measure of side AB.

Sine rule is an equation relating the lengths of the sides of a triangle to the sines of its angles. According to the law,

For a triangle Let B stands for the angle at B. Let C stand for the

angle at C and A for angle A. Also, let b = AC, a = BC and c = CB = a.

$\frac{a}{\sin A}=\frac{b}{\sin B}=\frac{c}{\sin C}$ ............(1)

Using sine rule,

Putting values in (1),

$\frac{a}{\sin 40}=\frac{10}{\sin 100}=\frac{a}{\sin 40}$

Considering first two ratios,

$\frac{a}{\sin 40}=\frac{10}{\sin 100}$

${a}=\frac{10 \times \sin 40}{\sin 100}$

${a}=6.52704 \Rightarrow a=6.53$ (approx)

Since, the triangle is isosceles so, other two sides are equal.

Thus, other sides are 6.53 inches long.

8 0

3 years ago

a sound wave is traveling at 3,810 m/s and has a wave length of 8 m. what is the frequency of the wave?

yawa3891 [41]

Answer:

476.25 hertz

Step-by-step explanation:

Since the speed of a wave is the wave length multiplied by the frequency, the frequency can be written as the speed divided by the wave length. 3810/8=476.25 hZ. Hope this helps!

6 0

3 years ago