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2 years ago

What is the value of each expression in the simplest form? -11/15 + (-2/15)

Mathematics

1 answer:

Liula [17]2 years ago

6 0

Answer:

$\frac{ - 13}{15}$

Step-by-step explanation:

$\frac{ - 11}{15} + \frac{ - 2}{15} = \frac{( - 11 - 2)}{15} = \frac{ - 13}{15}$

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Aiuda porfavor es para un examen

Marianna [84]

Answer:

Step-by-step explanation:

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1 year ago

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A population of mice is increasing exponentially. On Monday there were 120 most. One month later there were 132 most. Ready func

djyliett [7]

Answer:

$y=120 * 1.1^x$ --- function

The monthly rate is 10%

Step-by-step explanation:

Given

Let

$x \to months$

$y \to mice$

So, we have:

$(x_1,y_1) = (0,120)$ --- Monday

$(x_2,y_2) = (1,132)$ --- One month later

Required

The function

The function is represented as:

$y=ab^x$

In $(x_1,y_1) = (0,120)$ , we have:

$120 = a * b^0$

$120 = a * 1$

$120 = a$

$a=120$

In $(x_2,y_2) = (1,132)$ , we have:

$132 = a * b^1$

$132 = a * b$

Substitute: $a=120$

$132 = 120 * b$

Solve for b

$b = \frac{132}{120}$

$b = 1.1$

So, the function is:

$y=ab^x$

$y=120 * 1.1^x$

To calculate the monthly rate (r), we have:

$y =a(1 + r)^x$

Compare to: $y =ab^x$

$1 + r = b$

Make r the subject

$r = b-1$

Substitute $b = 1.1$

$r = 1.1-1$

$r = 0.1$

Express as percentage

$r = 0.1*100\%$

$r = 10\%$

5 0

2 years ago

Luba walked 5 miles in 1 1/2 hours. How fast did she walk in miles per hour?

katovenus [111]

Answer:

5m=11,2h

60/11

660+20

680/5

136

=2,15

4 0

2 years ago

What is the number if 50% of 25% of a number is 48?

dedylja [7]

Answer:

384

Step-by-step explanation:

If 48 is 50% of something, that means

48 + 48 = 96. Now, what number is 96 25% of? well 96 • 4 = 384. Now let's do the math backwards!

25 % of 384 is 96. 50 % of 96 is 48! so your answer is 384! Hope this helps!!!

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2 years ago

What is the solution for -10 < x - 9?

meriva

Answer:

x > -1

Step-by-step explanation:

Simplify both sides of the equation, then isolate the variable.

4 0

1 year ago

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