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zvonat [6]
2 years ago
11

Please answer the following questions only 5. 7. 8. 10. 11. and 12.

Mathematics
1 answer:
mojhsa [17]2 years ago
5 0

5) -20b+15

7) -30+9n

8)-48a+36

10) -{55}{24} n -\frac{185}{24}

11)  -  \frac{15}{15} n +  \frac{9}{15}

12)   -  \frac{1}{3} n +  \frac{25}{21}

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At a restaurant the cost for a breakfast taco and a small glass of milk is $2.10. The cost for 2 tacos and 3 small glasses of mi
tangare [24]

Answer:

The price for a small glass of milk is $0.95, and the price for a breakfast taco is $1.15.

Step-by-step explanation:

Let the price of a taco be x and the price for a small glass of milk be y.

x + y = 2.1

2x + 3y = 5.15

Multiply the first equation by 2:

2x + 2y = 4.2

Subtract the new third equation from the second equation:

(2x + 3y) - (2x + 2y) = 5.15 - 4.2

y = 0.95

Hence, the price for a small glass of milk is $0.95.

Substitute y into the first equation.

x + 0.95 = 2.1

x = 1.15

Therefore, the price for a breakfast taco is $1.15.

Hope this helped!

3 0
2 years ago
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Convert the fractions to decimals.
AnnZ [28]
<span>3/20: 0.15
7/50: 0.14
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1/9: 0.111111
9/40: 0.225
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5 0
3 years ago
Solve the inequality x - 3 &gt; 7
Katen [24]

Answer:

x > 10

Step-by-step explanation:

Given

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4 0
3 years ago
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Derivatives of inverse trigonometric functions please explain answers
Jobisdone [24]

I'll explain how to do the first one:-

y = cos-1(x2)

This can be described as ' a function of a function'   x^2 is a function of x and cos-1(x^2) is a function of x^2.

We need to  apply the chain rule.

Personally I find this  easier to understand if i let u = x^2, so

If y = f(u) and u is a function of x then

dy/dx = dy/ du * du/dx

Here u = x^2  and y = cos-1(u)

du/dx = 2x

so dy/dx = d(cos-1(x^2) dx = dy/du * du/dx


= -1 / √(1 - u^2) * 2x

= -2x / √(1 - u^2)    

= -2x / √(1 - (x^2)^2)

= -2x / √(1 - x^4)

I hope this helps. but if not. you might like to employ the formulae in the question - The square boxes contain the 'u' s in my answer. These formulae are equivalent to my explanation.

6 0
3 years ago
An animal shelter has a ratio of cats to dogs that is 9 to 7. If the shelter has 18 cats, how many dogs would it have?
madreJ [45]

Answer: 14 dogs

Step-by-step explanation:

Given

The ratio of cats to dogs is 9:7

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Suppose shelter has x dogs

\Rightarrow \dfrac{9}{7}=\dfrac{18}{x}\\\\\Rightarrow x=\dfrac{18\times 7}{9}=14\ \text{dogs}

5 0
3 years ago
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