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3 years ago

Drag each tile to the correct box. Match each equation with its solution.

Mathematics

1 answer:

Luba_88 [7]3 years ago

5 0

Answer:

1. n = 1

2. n = -1

3. n = -1/5

4. n = -25

Step-by-step explanation:

1. n - 13 = -12 (add 13 to each side)

n = 1

2. n/5 = -1/5 (multiply each side by 5)

n = -1

3. -5n = 1 (divide each side by -5)

n = -1/5

4. n + 15 = -10 (subtract 15 from each side)

n = -25

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If <br> f(x) = 7 sec x − 5x, find f '(x).

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3 years ago

Greg chose C as the answer. How might he have gotten that answer?

Katyanochek1 [597]

Given:

The equation is

$-0.4x+0.05y-1.25=0$

Where, y is the total cost and x is the number of months.

To find:

The y-intercept of the line represented by this equation.

Solution:

We have,

$-0.4x+0.05y-1.25=0$

Isolate y variable.

$0.05y=0.4x+1.25$

Divide both sides by 0.05.

$y=\dfrac{0.4x+1.25}{0.05}$

$y=\dfrac{0.4x}{0.05}+\dfrac{1.25}{0.05}$

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$y=8(0)+25$

$y=0+25$

$y=25$

Therefore, the y-intercept of the given equation is 25 and the correct option is D.

7 0

3 years ago

A population is normally distributed with mean 18 and standard deviation 1.7. (a) Find the intervals representing one, two, and

elena55 [62]

Answer:

Interval within 1 standard deviation: (16.3,19.7)

Interval within 2 standard deviation: (14.6, 21.4)

Interval within 3 standard deviation: (12.9, 23.1)

Step-by-step explanation:

We are given the following in the question:

Population mean, $\mu$ = 18

Standard deviation, $\sigma$ = 1.7

We have to find the following intervals:

Interval within 1 standard deviation:

$\mu \pm 1\sigma\\=18 \pm 1.7\\=(16.3, 19.7)$

Interval within 2 standard deviation:

$\mu \pm 2\sigma\\=18 \pm 2(1.7)\\= 18 \pm 3.4\\=(14.6,21.4)$

Interval within 3 standard deviation:

$\mu \pm 3\sigma\\=18 \pm 2(1.7)\\= 18 \pm 5.1\\=(12.9,23.1)$

6 0

4 years ago

Find the x-intercepts of the parabola with vertex (-7,45)

REY [17]

Use the vertex form,
y=a(x-h)^2+ky=a(x+7)^2+45
<span>Use the y-intercept to solve for a</span>-200=a(0+7)^2+45
49a+45=-20049a=-245a=-5

3 0

3 years ago