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3 years ago

Write an equation of the line passing through (- 5,4) and having slope -7.

Mathematics

1 answer:

lubasha [3.4K]3 years ago

8 0

thre are 1286 so that how i get my answer

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What is the circumference of a circle if the radius is 13?

Lilit [14]

C=2πr=2·π·13≈81.68141
C=81.68

7 0

4 years ago

Read 2 more answers

Forty-two cities provided information on vacancy rates (in percent) for local apartments in the following frequency distribution

Tresset [83]

Answer:

$(a)\ \bar x = 7.07$

$(b)\ \sigma^2 = 18.67$

$(c)\ \sigma = 4.32$

Step-by-step explanation:

Given

$\begin{array}{cc}{Rate (\%)} & {f} & {0-3} & {10} & {3-6} & {9} & {6-9} & {8} & {9-12} & {7} & {12-15} & {8} \ \end{array}$

Solving (a): The average vacancy rate

First, we calculate the class midpoint (x). This is the mean of the class boundaries.

$x = \frac{0+3}{2} = 1.5$ $x = \frac{3+6}{2} = 4.5$ $x = \frac{6+9}{2} = 7.5$

When done for the whole class, the frequency table becomes:

$\begin{array}{ccc}{Rate (\%)} & {f} & {x} & {0-3} & {10} &{1.5}& {3-6} & {9} &{4.5}& {6-9} & {8} & {7.5}&{9-12} & {7} &{10.5}& {12-15} & {8} &{13.5}\ \end{array}$

The average rate is:

$\bar x = \frac{\sum fx}{\sum f}$

$\bar x = \frac{10*1.5 + 9*4.5+8*7.5+7*10.5+8*13.5}{10+9+8+7+8}$

$\bar x = \frac{297}{42}$

$\bar x = 7.07$

Solving (b): The variance

This is calculated as:

$\sigma^2 = \frac{\sum f(x -\bar x)^2}{\sum f}$

$\sigma^2 = \frac{10(1.5-7.07)^2 + 9(4.5-7.07)^2+8(7.5-7.07)^2+7(10.5-7.07)^2+8(13.5-7.07)^2}{10+9+8+7+8}$

$\sigma^2 = \frac{784.2858}{42}$

$\sigma^2 = 18.67$

Solving (c): The standard deviation.

This is calculated as:

$\sigma = \sqrt{\sigma^2$

$\sigma = \sqrt{18.67$

$\sigma = 4.32$

6 0

3 years ago

I need help pleaseeeeee

Rama09 [41]

Answer:

the second answer

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

The perimeter of a rectangular lot is 198 ft. The width of the lot is 57 ft less than twice length. Find the

Brilliant_brown [7]

Step-by-step explanation:

W = (2L -57)

P = 2×(L+W)

198 = 2× (L + 2L -57)

198 = 2× (3L - 57)

3L-57 = 198/2

3L-57 = 99

3L = 99+57

3L = 156

L = 156/3 = 52

W = 2(52) -57 = 104-57 = 47

so, the length = 52 ft

and the width = 47 ft

5 0

3 years ago

0.8+7=-0.7k+1 what is the answer

Ede4ka [16]

After combining like terms:
-0.7k + 1 = 7.8
Subtract the 1 from both sides:
-0.7k = 6.8
Divide by -0.7 from both sides:
k = -9.7142, simplified is -9.7

Checked Answer:
-0.7(-9.7) = 6.79, simplified is 6.8

6 0

3 years ago

Write an equation of the line passing through ​(- 5​,4​) and having slope -7.

Write an equation of the line passing through (- 5,4) and having slope -7.