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2 years ago

Can anyone find out what this is?

Mathematics

1 answer:

Charra [1.4K]2 years ago

4 0

Answer:

Expression D

Step-by-step explanation:

all other answers are above 15! hope this helps :D

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Find an equation of variation where y varies directly as x and y = 0.8 when x = 0.4

GrogVix [38]

Answer:

y = 2x

Step-by-step explanation:

Given that y varies directly as x then the equation relating them is

y = kx ← k is the constant of variation

To find k use the condition y = 0.8 when x = 0.4

k = $\frac{y}{x}$ = $\frac{0.8}{0.4}$ = 2

y = 2x ← equation of variation

7 0

3 years ago

Write an equation of the line that passes through the point (–1, 4) with slope 2. A. y+1=−2(x−4) B. y+1=2(x−4) C. y−4=2(x+1) D.

In-s [12.5K]

Answer:

$y-4=2\,(x+1)$

which agrees with answer C in your list of possible answers.

Step-by-step explanation:

We can use the general point-slope form of a line of slope m and going through the point $(x_0, y_0)$ :

$y-y_0=m(x-x_0)$

which in our case, given the info on the slope (2) and the point (-1, 4) becomes:

$y-y_0=m\,(x-x_0)\\y-4=2\,(x-(-1))\\y-4=2\,(x+1)$

6 0

3 years ago

(4p2 - 5p - 4) + (5p2 - 4-2p)

Rasek [7]

Answer:

9p^2 - 7p - 8

Hope this helps! Can I have BRAINLIEST please?

5 0

3 years ago

Read 2 more answers

Find the value of x.

son4ous [18]

Answer:

18.0

Step-by-step explanation:

==>Given:

Triangle with sides, 16, 30, and x, and a measure of an angle corresponding to x = 30°

==>Required:

Value of x to the nearest tenth

==>Solution:

Using the Cosine rule: c² = a² + b² - 2abcos(C)

Let c = x,

a = 16

b = 30

C = 30°

Thus,

c² = 16² + 30² - 2*16*30*cos 30°

c² = 256 + 900 - 960 * 0.8660

c² = 1,156 - 831.36

c² = 324.64

c = √324.64

c = 18.017769

x ≈ 18.0 (rounded to nearest tenth)

8 0

3 years ago

Factor <br><br> LaTeX: 7v^2+31v+12

bazaltina [42]

Answer:

(7v +3 ) ( v + 4 )

Step-by-step explanation:

7v^2+31v+12

(7v + ) ( v + )

12 = 1*12

2*6

3*4

7* 4 + 3 = 31

(7v +3 ) ( v + 4 )

6 0

3 years ago