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borishaifa [10]
3 years ago
8

Last questions; I NEED HELP!

Mathematics
1 answer:
Hitman42 [59]3 years ago
5 0
Given that cos Ф = 5/6 I know that one side is 5 and the hypotenuse is 6 so the other side is:
a^2 = c^2 - b^2
a^2 = 6^2 - 5^2
a^2 = 36 - 25 = 11
a = \sqrt{11}

Now I know that the sin is \frac{ \sqrt{11} }{6} since sin is defined as opposite/hypotenuse

the second one uses a form of C = pi * d we are going to add the sector part to it.
C = 6 and the central angle is 4 degrees we can set up like this:
6 =  \frac{4}{360}* \pi *d
\frac{6 * 360}{4 *  \pi } = d

d = 171.974
r = 171.94/2 =85.987
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2x + y = 20<br> 6x - 5y =12
Vera_Pavlovna [14]
Rearrange the first equation
2x + y = 20
take away 2x from both sides
y = 20 - 2x 
substitute this y value into the second equation
6x - 5(20 - 2x) = 12
6x -100 +10x = 12
add 100 to both sides
6x + 10x = 112
16x = 112
divide both sides by 16 
x = 7
Substitute this x value into the first equation to get y.
2(7) + y = 20
14 + y = 20
take away 14 from both sides
y = 6

So, y = 6 and x = 7
7 0
3 years ago
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Someone help 10<br> Points !
Vlada [557]

Answer:

x=1

Step-by-step explanation:

3*1=3  3*3=9

  3+9=12

4 0
3 years ago
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99 POINTS AND BRAINLIST!!!! BE FIRST WITH THE "RIGHT" ANSWER!!
VladimirAG [237]

Answer:

The answer should be 150 x .20 = 30m/s

5 0
3 years ago
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Change 72 out of 123 to a percentage
Elanso [62]

Answer:

72 / 123 * 100 = 58.53658537  per cent

Step-by-step explanation:

4 0
3 years ago
Martin deposits $700 into a savings account that gains interest at a rate of 5.5% annually. If he waits 7 years to withdraw the
Travka [436]

。☆✼★ ━━━━━━━━━━━━━━  ☾  

Use the multiplier 1.055

final = original x multiplier^n

where 'n' is the number of years

Sub the values in

final = 700 x 1.055^7

final = 1018.27

Subtract the values:

1018.27 - 700 = 318.27

Thus, he earns more than $275

He earns $43.27 more

Have A Nice Day ❤    

Stay Brainly! ヅ    

- Ally ✧    

。☆✼★ ━━━━━━━━━━━━━━  ☾

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