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Dimas [21]
3 years ago
12

Geometry please help

Mathematics
1 answer:
ella [17]3 years ago
5 0

Answer:

1. A sound wave in air has a frequency of 262 Hz and travels at a speed of 330 m/s.

2. Sound has a speed of 340 m/s in air at room temperature.

3. A wave has a frequency of 500 Hz and a wavelength of

4. The speed of light is 3.0x10^8 m/s, calculate for the frequency.

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The price of the meal was $33.95 x 15%= $5.09 tip add both together the total cost was $39.04
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Answer fast, please. I need help on it!
Rasek [7]

Answer:

Missing temp: -5

Step-by-step explanation:

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How do you start this and find the weight of each shape? I do not remember doing this in class.
suter [353]
Let's say   make the shapes, some variable name

say   

⛁    ⚪     ◽    ▯
a     b      c     d

so.. if take those are the shapes provided

then we can take a look at the first set and we can say that

2a + b + c = 20

a + 4d + b = 19

a + c = 9

3c + d + a = 19 

thus     \bf \begin{cases}
2a + b + c = 20\\
a + 4d + b = 19\\
a + c = 9\\
3c + d + a = 19 
\end{cases}\\\\
-----------------------------\\\\
a+c=9\implies \boxed{c}=9-a\qquad thus
\\\\\\
2a+b+\boxed{9-a}=20\implies \underline{b}=11-a\impliedby thus
\\\\\\
a+4d+\underline{11-a}=19\implies d=\cfrac{8}{4}\implies d=2\\\\
-----------------------------\\\\
then\qquad 3\left(\boxed{9-a } \right)+\boxed{2}+a=19\implies 27-3a+2+a=19
\\\\\\
10=2a\implies 5=a

and surely you can find the other two

4 0
3 years ago
Math simplify (7a+5b-2c) + (5a+7b) + (2a-7c) + (2a-5b+3c) algebra
Alekssandra [29.7K]

Answer:

-10a^2+25ab-15ac+12a+12b-2c

Step-by-step explanation:

(7a+5b-2c)+(5a+7b)+(2a-7c)+(2a-5b+3c)

Distribute:

=7a+5b-2c+5a+7b+(2a)(2a)+(2a)(-5)+(2a)(3c)+(-7a)(2a)+(-7a)(-5b)+(-7a)(3c)

=7a+5b-2c+5a+7b+4a^2-10ab+6ac-10a^2+35ab-21ac

Combine all like terms:

=(4a^2-14a^2)+(-10ab+35ab)+(6ac-21ac)+(7a+5a)+(5b+7b)+(-2c)

=-10a^2+25ab-15ac+12a+12b-2c

6 0
3 years ago
1. Using property, simplify:
lorasvet [3.4K]

Answer:

You can only solve this using BODMAS

Step-by-step explanation:

You solve them in this order

B=Brackets

O=Orders

D=Division

M=Multiplication

A=Addition

S=Subtraction

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