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frutty [35]
3 years ago
10

Please help me I don't understand this

Mathematics
1 answer:
Svetlanka [38]3 years ago
8 0
YOU JUST DO 28*7 and you get 196
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Please help me it’s probably easy for you guys but I love you guysss!! <3
krok68 [10]

Answer:

i dont know u

Step-by-step explanation:

8 0
3 years ago
A trumpet has a length of 140cm. The first valve lowers the root note by two semitones (f1/f0 = 2-2/12) and the second valve low
Alexxandr [17]

Answer:

a.  17.145cm

b. 8.325cm

c. 0.846

d. 2.896

Step-by-step explanation:

It is known that frequency is inversely proportional to length.

Case 1: The player presses only the first valve.

f₁/fo = 2^{-2/12} = lo/l₁

given that lo= 140cm.

l₁ = 2^{2/12}lo = 157.145

change in length:

l₁ - lo = 157.145 - 140 = 17.145cm

Case 2: The player presses only the second valve.

f₂/fo = 2^{-1/12} = lo/l₂

l₂ = 2^{1/12}lo = 148.325cm

l₂  - lo= 148.325-140 = 8.325cm

Case 3: The player presses both the first and second valve.

Change in length is the sum of change in length when they are individually pressed.

l₃ - lo = 17.145+8.325 = 25.47cm

l₃ = 25.47cm+lo = 165.47cm

f₃/fo  = 2^{-n/12} = lo/l₃

f₃/fo = 2^{-n/12} = 140/{165.47 = 0.846

2^{-n/12} = 0.846\Rightarrow n/12 = -log(0.846)/log(2) = 0.2413

n = 0.2413*12 = 2.896

5 0
3 years ago
3x=18<br><br> what is the answer
Wittaler [7]

Answer:

6

Step-by-step explanation:

divide 18 by 3 you get x=6

7 0
3 years ago
Read 2 more answers
Solve each quadratic equation. Show your work.
umka2103 [35]
14. 2x-1 = 0, x+7=0
x = 1/2, x = -7

15. x^2 + 3x - 10 = 0
(x + 5)(x - 2) = 0 
x = -5, x = 2

16. x^2 - 25 = 0
(x-5)(x+5)
x = 5, x  = -5
5 0
3 years ago
Which of the following systems of inequalities has point D as a solution? Two linear functions f of x equals 3 times x plus 4 an
Pani-rosa [81]

Answer:

B) f(x) ≥ 3x + 4

g of x is less than or equal to negative one half times x minus 5

Step-by-step explanation:

From the above graph,  

If point B is the solution of the system of inequalities, then point B must satisfies both inequalities  

We can see from the graph that

Point B is located above (≥) the boundary line for f(x) and is also below (≤) the boundary line for g(x).

So we can say,

Point b satisfies the inequalities

Therefore,  

The system is  

 f(x) ≥ (3x+4)

 g(x) ≤ (-1/2x -5)

Hopes this Helps :)

8 0
3 years ago
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