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3 years ago

Equations

Mathematics

2 answers:

Flauer [41]3 years ago

8 0

Answer:

Step-by-step explanation:

-3x + 4y = -18

8x - 4y = 28

5x = 10

x = 2

4 - y = 7

-y = 3

y = -3

(2, -3)

Savatey [412]3 years ago

7 0

Answer:

C is the answer

Step-by-step explanation:

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4(v+7) = -6(3v-4) +8v<br>

xxTIMURxx [149]

Answer:

v=−27

Step-by-step explanation:

Since v is on the right side of the equation, switch the sides so it is on the left side of the equation.

−6(3v−4)+8v=4(v+7)

Simplify −6(3v−4)+8v

−10v+24=4(v+7)

Simplify 4(v+7).

−10v+24=4v+28

Move all terms containing v to the left side of the equation.

−14v+24=28

Move all terms not containing v to the right side of the equation.

−14v=4

Divide each term by −14 and simplify.

v=−27

The result can be shown in multiple forms.

Exact Form:

v=−27

6 0

2 years ago

How many times can 1021 go into 6

mina [271]

Answer:

uh i really wanna help but maybe dividing would help :)

Step-by-step explanation:

8 0

2 years ago

given that sin theta= 1/4, 0 is less than theta but less than pi/2, what is the exact value of cos theta

lapo4ka [179]

Answer:

$\cos{\theta} = \frac{\sqrt{15}}{4}$

Step-by-step explanation:

For any angle $\theta$ , we have that:

$(\sin{\theta})^{2} + (\cos{\theta})^{2} = 1$

Quadrant:

$0 \leq \theta \leq \frac{\pi}{2}$ means that $\theta$ is in the first quadrant. This means that both the sine and the cosine have positive values.

Find the cosine:

$(\sin{\theta})^{2} + (\cos{\theta})^{2} = 1$

$(\frac{1}{4})^{2} + (\cos{\theta})^{2} = 1$

$\frac{1}{16} + (\cos{\theta})^{2} = 1$

$(\cos{\theta})^{2} = 1 - \frac{1}{16}$

$(\cos{\theta})^{2} = \frac{16-1}{16}$

$(\cos{\theta})^{2} = \frac{15}{16}$

$\cos{\theta} = \pm \sqrt{\frac{15}{16}}$

Since the angle is in the first quadrant, the cosine is positive.

$\cos{\theta} = \frac{\sqrt{15}}{4}$

3 0

3 years ago

Shelley read 40 business proposals between 6 am and 11 am. On average how many proposals did she read per hour

UkoKoshka [18]

Answer: 8 proposals per hour

Step-by-step explanation: 40/5 = 8

6 0

2 years ago

NEED HELP IN SOLVING THIS AREA PROBLEM !!!!!

dezoksy [38]

I’m not sure if it’s add or multiple the sides of each I don’t know if this even helped lol

6 0

2 years ago

Read 2 more answers