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Paladinen [302]
3 years ago
8

Select the expressions that are equivalent to 4(m+9).

Mathematics
2 answers:
enyata [817]3 years ago
4 0
4m+9 can I have brainliest
Marianna [84]3 years ago
3 0

Answer:

4m+9

Step-by-step explanation:

4(m+9)

4m+9

4(m+9)=4m+9

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Answer:

i’m pretty sure it’s because they make 180°

Step-by-step explanation:

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2 years ago
3x/3x-1 + 2/x =1 this is the question
dmitriy555 [2]
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2 years ago
If cos(x) = Three-fourths and tan(x) < 0, what is cos(2x)?
makvit [3.9K]

Step-by-step explanation:

The value of sin(2x) is \sin(2x) = - \frac{\sqrt{15}}{8}sin(2x)=−

8

15

How to determine the value of sin(2x)

The cosine ratio is given as:

\cos(x) = -\frac 14cos(x)=−

4

1

Calculate sine(x) using the following identity equation

\sin^2(x) + \cos^2(x) = 1sin

2

(x)+cos

2

(x)=1

So we have:

\sin^2(x) + (1/4)^2 = 1sin

2

(x)+(1/4)

2

=1

\sin^2(x) + 1/16= 1sin

2

(x)+1/16=1

Subtract 1/16 from both sides

\sin^2(x) = 15/16sin

2

(x)=15/16

Take the square root of both sides

\sin(x) = \pm \sqrt{15/16

Given that

tan(x) < 0

It means that:

sin(x) < 0

So, we have:

\sin(x) = -\sqrt{15/16

Simplify

\sin(x) = \sqrt{15}/4sin(x)=

15

/4

sin(2x) is then calculated as:

\sin(2x) = 2\sin(x)\cos(x)sin(2x)=2sin(x)cos(x)

So, we have:

\sin(2x) = -2 * \frac{\sqrt{15}}{4} * \frac 14sin(2x)=−2∗

4

15

∗

4

1

This gives

\sin(2x) = - \frac{\sqrt{15}}{8}sin(2x)=−

8

15

6 0
2 years ago
Read 2 more answers
What are some real life situations using system of equations?
OlgaM077 [116]
Bob's car rental company makes you pay 10 dollars per day you rent the car and a 30 dollar insurance fee

joe's car rental company makes you pay 30 dollars per day you rent the car and a 10 dollar insurance fee

how many days do you need to rent a car for the cost for renting both are the same

bob=10x+30
joe=30x+10
set each to each other
10x+30=30x+10
subtract 10x
30=20x+10
subtract 10
20=20x
divide both sides by 20
1=x
you need to rent 1 day for them to be equal
3 0
2 years ago
2 bags of marshmallows are shared equally among 5 people.
exis [7]

Answer:

2/5 or 40% of a bag

Step-by-step explanation:

2 bags/5 people

goes to 2/5

which is equal to 4/10

also equal to 40/100

we can rewrite this as a percenatge 40%

Therefore each person gets 40% of a bag of marshmellows

7 0
3 years ago
Read 2 more answers
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