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Lostsunrise [7]
3 years ago
10

-3x + 7y = 5x + 2y what is y when x is -5 PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
mariarad [96]3 years ago
5 0

Answer:

-5

Step-by-step explanation:

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Find value of x and y
marshall27 [118]

Answer:

x = 17\sqrt{3}, y = 34

Step-by-step explanation:

Since the triangle is right use trig ratios to find x and y

note exact values sin30° = \frac{1}{2}, tan30° = \frac{1}{\sqrt{3} }

sin30° = \frac{opposite}{hypotenuse} = \frac{17}{y}

multiply both sides by y

y sin30° = 17 ( divide both sides by sin30° )

y = \frac{17}{\frac{1}{2} } = 34

tan30° = \frac{opposite}{adjacent} = \frac{17}{x}

multiply both sides by x

x tan30° = 17 ( divide both sides by tan30° )

x = \frac{17}{\frac{1}{\sqrt{3} } } = 17\sqrt{3}

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3 years ago
Write 1/4 in decimals
Marina86 [1]

On a calculator of you put in 1/4 it would give you 0.25 or simply .25    

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3 years ago
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which answer shows 6x6x6x6 correctly in exponential form please select the correct answer is it a. 6/6 b. 4/6 c.4/6 d.6/4
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3 years ago
Max has $2,000 he would like to invest in an account that pays simple interest. Max would like to earn a total of $650 in intere
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Answer: 6.5%

Step-by-step explanation:

Formula for simple interest : I = Prt , where P= principal , r= rate of interest  t= time

As per given , P = $2000 , I=$ 650, t= 5 years

Substitute all theses values in the formula , we get

650=2000\times r\times5\\\\\Rightarrow\ r=\dfrac{650}{2000\times5}\\\\\Rightarrow\ \dfrac{65}{1000}\\\\\Rightarrow\ r=0.065 =0.065\times100\%=6.5\%

Hence, the required annual interest = 6.5%

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3 years ago
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