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3 years ago

Given f(x) = 3x - 5. What is fl-4)?

Mathematics

2 answers:

velikii [3]3 years ago

8 0

F (4)=7 have a nice day !

Nataly_w [17]3 years ago

3 0

Answer:

f(4)=7

Step-by-step explanation:

f(x)=3x-5

f(4)=3(4)-5

f(4)=12-5

f(4)=7

If this helps please mark as brainliest

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Does a line that bisects an angle of a triangle also bisects the side that is opposite the angle?

Mekhanik [1.2K]

Yes, the bisecting line will also bisect the side

7 0

3 years ago

Read 2 more answers

Dwight and Walt are building model cars. Dwight builds 7 fewer models than 4 times the number Walt builds.Dwight builds at most

romanna [79]

$4x-7\leq 9$ inequality could be used to find the number of models Walt builds. Correct option B).

Step-by-step explanation:

Here we have , Dwight and Walt are building model cars. Dwight builds 7 fewer models than 4 times the number Walt builds.Dwight builds at most 9 models. We need to find Which inequality could be used to find the number of models Walt builds . Let's find out:

Let the the number Walt builds is x , So Dwight builds 7 fewer models than 4 times the number Walt builds i.e.

⇒ $4x-7$

But , according to question Dwight builds at most 9 models i.e.

⇒ $4x-7\leq 9$

⇒ $4x\leq 16$

⇒ $\frac{4x}{4}\leq \frac{16}{4}$

⇒ $x\leq 4$

Therefore , $4x-7\leq 9$ inequality could be used to find the number of models Walt builds which is Dwight builds at most 9 and Walt builds at most 4 .

4 0

3 years ago

Plzz help steps if possible if not its ok j=i just need to pass this class

hammer [34]

Answer:

$\text{(B) }\cos 40^{\circ}=\frac{x}{60}$

Step-by-step explanation:

In any triangle, the cosine/cos of an angle is equal to its adjacent side divided by the hypotenuse (longest side) of the triangle. (a/h)

The angle marked 40 degrees has an adjacent side of $x$ and the hypotenuse of the triangle is 60.

Therefore, we have the equation:

$\boxed{\cos 40^{\circ}=\frac{x}{60}}$

6 0

3 years ago

Does the point (-9,-4) satisfy the equation y = x + 5?

ozzi

Answer:

Yes it satisfies the equation

Step-by-step explanation:

Let, P(x,y) = (-9,-4)

Then, x = -9

y = -4

if we use this value in the equation, we will get L.S = R.S ;(-4 = -9 + 5)

So, the point satisfies the equation

Hope you have understood this

Pls mark my answer as the brainliest

5 0

3 years ago

Determine the average speed of the current in a river if a boat moves at 20 miles/hour in still water and takes 3 hours to trave

Taya2010 [7]

The speed of the current in a river is 6 miles per hour

Solution:

Given that,

Speed of boat in still water = 20 miles per hour

Time taken = 3 hours

Distance downstream = 78 miles

To find: Speed of current

If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then:

Speed downstream = (u + v) km/hr

Speed upstream = (u - v) km/hr

Therefore, speed downstream is given as:

$\text{ speed downstream } = \frac{distance}{time} = \frac{78}{3}\\\\\text{ speed downstream } = 26 \text{ miles per hour }$

We know that,

Speed downstream = (u + v)

26 = 20 + v

v = 26 - 20

v = 6 miles per hour

Thus speed of the current in a river is 6 miles per hour

3 0

3 years ago