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Brums [2.3K]
3 years ago
6

Assume that 0 < x < pi/2 0 < y < pi/2 Find the exact value of cos(x - y) * if * cos x = 3/5 and cos y = 4/5

Mathematics
1 answer:
jasenka [17]3 years ago
8 0

Answer:C

Step-by-step explanation: It’s C because I guessed that $h1t and looked back and I got it right. When in doubt always pick C my dudes.

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Raj was friends with his waitress so he left her a 90 percent tip
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3 years ago
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James invests $5,072 in a savings account
Sergeu [11.5K]

Answer:

$13087.92

Step-by-step explanation:

formula: ab^x

a= starting  amount

a= 5072

b= 1+r

r=rate

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b=1+0.09 =1.09

x= 11 (years)

account after 11 years:

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Hi whats <br> u = x - k solve for x
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Answer:

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Step-by-step explanation:

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2 years ago
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Solve x 2 + 9x + 8 = 0 by completing the square. What are the solutions?
Sindrei [870]

So firstly, what two terms have a product of 8x^2 and a sum of 9x? That would be x and 8x. Replace 9x with x + 8x: x^2+x+8x+8=0

Next, factor x^2 + x and 8x + 8 separately. Make sure that they have the same quantity on the inside: x(x+1)+8(x+1)=0

Now you can rewrite the equation as (x+8)(x+1)=0

Now using zero product property, solve for x:

x+8=0\\ x=-8\\ \\ x+1=0\\ x=-1

<u>In short, the solutions are {-1,-8}, or C.</u>

4 0
3 years ago
Point S is on line segment RT . Given RS = 4x − 10, ST=2x−10, and RT=4x−4, determine x.Find RS.Find ST. Find RSFind ST. Find RT.
Inessa05 [86]

Answer:

RS=22 ST=6 RT=28

Step-by-step explanation:

7 0
2 years ago
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