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USPshnik [31]
2 years ago
12

Which expression is equivalent to 15n – 20?

Mathematics
2 answers:
crimeas [40]2 years ago
7 0

Answer:

5(3n-4)

Step-by-step explanation:

because(5*3n)-(5*4)=15n-20

Semenov [28]2 years ago
3 0

The only thing you can do with this expression is to factor a 5 out of the two terms: we have

15n-20 = 5(3n-4)

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cos (x/2) = -sqrt2/2 in (0,360) looking for two values ?? Can someone please help me I can’t seem to figure out how to solve thi
ValentinkaMS [17]

Answer:

135° and 225°

Step-by-step explanation:

basically you want to find the value of x between 0 and 360 in this equation

cos x/2 = -(√2)/2

assume x/2 as n, so

cos n = -(√2)/2

n = 45°

then remember the quadrant system

0-90 1st quadrant, all is POSITIVE

90-180 2nd quadrant, only SIN has positive value

180 - 270 3rd quadrant, only TAN has positive value

270 -360 4th quadrant, only COS positive here.

so if you try to find negative value look into 2nd and 3rd quadrant that related 45° to x-axis (0°or 180°)

so the value of x is

180 - 45 = 135° (2nd quadrant) and

180 + 45° = 225° (3rd quadrant)

8 0
2 years ago
Justin rolled a number cube 48 times. The cube landed on the number six
Leokris [45]

Answer:

Less then

Step-by-step explanation:

therietic prob is 8

3 0
2 years ago
Read 2 more answers
What is the domain of f(x)=3x-4
klemol [59]

Answer:

There are no domains so 0

Step-by-step explanation:

The domain of any function is simply all the possible numbers you can input for   x

without violating the rules of math.

we cannot have a negative number for x (its against the laws of math), so the domain would be all non-negative numbers

:) Hoped this helped

6 0
3 years ago
Read 2 more answers
What is the decimal form for 3750?<br><br>​
Shtirlitz [24]

Answer:

.3750

Step-by-step explanation:

sorry if this is wrong. I don't understand

3 0
3 years ago
5.For the function define by :<br><br> Please help
lesya692 [45]

Answer:

Step-by-step explanation:

The breaking point for the graph (if there was one), is one. That means at one the function you use changes.

It goes from x^2 to 2x + 1

Answer A

Here's the catch. Where is 0? Zero is less than one. So what do you use? The answer is that f(x) = x^2

Answer B

if f(x) = x^2 then wherever you see an x, you put in 0.

f(x) = x^2

f(0) = 0^2

You could multiply 0 by itself a million times and it would still get 0.

f(0) = 0

8 0
2 years ago
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