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3 years ago

6.4n - 10= 4.4n + 6 help me

Mathematics

1 answer:

liberstina [14]3 years ago

4 0

Answer:n=8

isolate the variable :)

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Mr graham would like to plant a rectangular garden. He wants the length of the garden to be 6 feet longer than twice the width.t

dangina [55]

L = 2w + 6
p = 144

144 = 2w + 2(2w + 6)
144 = 2w + 4w + 12
132 = 6w
w = 22

l = 2(22) + 6
l = 50

The length is 50 feet and the width is 22 feet.

5 0

3 years ago

If sin theta equals 12 divided by 13 and theta is in quadrant 2 cos20 equals? and cos theta equals?

Anni [7]

Answers:

cos(2theta) = -119/169
cos(theta) = -5/13

=====================================================

The given info is:

sin(theta) = 12/13
theta is in quadrant II

From that, we can use the pythagorean trig identity to find that cos(theta) = -5/13. Keep in mind that cosine is negative in quadrant II.

Now use the trig identity below to compute cos(2theta)

$\cos(2\theta) = \cos^2(\theta)-\sin^2(\theta)\\\\\cos(2\theta) = \left(\frac{-5}{13}\right)^2-\left(\frac{12}{13}\right)^2\\\\\cos(2\theta) = \frac{25}{169}-\frac{144}{169}\\\\\cos(2\theta) = \frac{25-144}{169}\\\\\cos(2\theta) = -\frac{119}{169}\\\\$

Other options you could use are these identities

$\cos(2\theta) = 2\cos^2(\theta)-1\\\\$

$\cos(2\theta) = 1-2\sin^2(\theta)\\\\$

3 0

3 years ago

Brianna and let kelci are raising money for a class field trip. Brianna has raised 3 times more money than kelci, but together t

ddd [48]

Let $x be the amount of money which Kelci has raised. Brianna has raised 3 times more money than kelci, then she has raised $3x. Totally both have aised $(x+3x)=$4x.

Since together they have raised more than $300, then 4x>300,

$x\ \textgreater \ \dfrac{300}{4}$ .
Answer: the inequality $x\ \textgreater \ \dfrac{300}{4}$ can be used to determine the amount of money kelci has raised

7 0

4 years ago

jeff got a 23/25 on his first math test, a 93% on hi second test, and a 0.89 on his third test. Witch of the following orders hi

vodka [1.7K]

Answer:

0.89 23/25 93%

Step-by-step explanation:

hope this helps!!! :)

6 0

3 years ago

The Martin family is comparing the costs of two different cable companies. Direct TV charges a

nikdorinn [45]

Answer:

It would take 5.5 months for the two cable companies to cost the same.

Step-by-step explanation:

50x + 100 = 60x + 45

-45 -45

50x + 55 = 60x

-50x -50x

55 = 10x

/10 /10

x = 5.5

6 0

3 years ago

Read 2 more answers