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Margaret [11]
3 years ago
11

HELP!!!! thank you in advance!!​

Mathematics
1 answer:
MakcuM [25]3 years ago
6 0

Question writer: it's customary to keep the degree sign off of the variable names in trig.

sin y = s/8

tan y = s/t

tan y = sin y  /   cos y

cos y = sin y / tan y

cos y = (s/8) / (s/t) = (s/8) × (t/s) = t/8

Answer: cos y = t/8,  third choice

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Subtract and simplify. Show work please!
ra1l [238]

1) Final expression: +7y^2-6y-17

2) Final expression: 21x^3-46x^2+59x-30

Step-by-step explanation:

1)

The first expression is

(-2y^2-11y-7)-(-9y^2-5y+10)

First, we remove the 2nd bracket by changing the sign of all the terms inside:

-2y^2-11y-7-+9y^2+5y-10

Now we group the terms with same degree together:

(-2y^2+9y^2)+(-11y+5y)+(-7-10)

Now we solve the expression in each brackets:

(-2y^2+9y^2)+(-11y+5y)+(-7-10)=\\+7y^2-6y-17

So, this is the final expression.

2)

The second expression is

(7x-6)(3x^2-4x+5)

We apply the distributive property, so we rewrite the expression as follows:

(7x-6)(3x^2-4x+5)=7x(3x^2-4x+5)-6(3x^2-4x+5)

Solving both brackets,

7x(3x^2-4x+5)-6(3x^2-4x+5)=\\21x^3-28x^2+35x-18x^2+24x-30

Now we group terms of same degree together:

21x^3-28x^2+35x-18x^2+24x-30=\\21x^3+(-28x^2-18x^2)+(35x+24x)-30

And solving each bracket,

21x^3+(-28x^2-18x^2)+(35x+24x)-30=\\21x^3-46x^2+59x-30

So, this is the final expression.

Learn how to simplify expressions:

brainly.com/question/7014769

brainly.com/question/11007572

brainly.com/question/11334714

#LearnwithBrainly

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3 years ago
WILL GIVE BRAINLIEST
jasenka [17]
$45,600

12 (200 + 75s)
12 ((200 + 75 (48))
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8 0
3 years ago
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2a + 6 = 6<br> 2a =<br> Subtract 6 from both sides<br> Divide both sides by 2
Alla [95]

Answer:

0

Step-by-step explanation:

2a+6=6

-6=-6

2a=0

2 2

a=0

8 0
3 years ago
Can someone help me with this question
Flura [38]
The answer is A or c I’m probs wrong
7 0
3 years ago
Is 34 over 35 greater than 0.6
mart [117]

Answer:

yes

Step-by-step explanation:

34/36=0.94 repeating

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