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Nimfa-mama [501]
3 years ago
6

What is the value of the function y= 3x – 1 when x= -1 ? -8 -4 02 6

Mathematics
1 answer:
netineya [11]3 years ago
7 0

Answer:

-4

Step-by-step explanation:

3(-1)-1     PEMDAS

-3-1=-4

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The units digit of a two digit number is 1 more than twice the tens digit. If the digits are reversed, the new number is 36 more
Vlad1618 [11]

Answer:

37

Step-by-step explanation:

Let the initial number be xy=10x+y.

Initial number:

Units digit = y

Tens digit = x

The units digit of a 2-digit number is 1 more than twice the tens digit, then

y=2x+1

Reversed number is yx=10y+x.

If the new number is 36 more than the original number, then

(10y+x)-(10x+y)=36

Simplify this equation:

10y+x-10x-y=36\\ \\9y-9x=36\\ \\y-x=4

Substitute y=2x+1 into the equation y-x=4:

(2x+1)-x=4\\ \\2x+1-x=4\\ \\x+1=4\\ \\x=3\\ \\y=2\cdot 3+1=7

Initial number: 37

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3 years ago
Simplify 3a(- 3a+4)- 4(3-2)
Zarrin [17]
-9a to the second power+12a-4
6 0
3 years ago
The circumference of a circle is 28π inches. What is the length of the radius of this circle?
devlian [24]

Answer:

The radius of the circle is 14 inches.

Step-by-step explanation:

How is the circumference of a circle related to its radius?

\displaystyle \text{Circumference} = \pi\times \text{Diameter} = \pi\;(2\times \text{Radius}).

In brief,

\text{Circumference} = 2\pi\times \text{Radius}.

For this question,

  • \text{Circumference} = 28\pi, and
  • \text{Radius} needs to be found.

Divide both sides of the equation by 2\pi:

\displaystyle \frac{\text{Circumference}}{2\pi} = \text{Radius}.

\displaystyle \text{Radius} = \frac{\text{Circumference}}{2\pi} = \frac{28\pi}{2\pi} = 14.

In other words, the radius of this circle is 14 inches.

6 0
3 years ago
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fenix001 [56]
Ok so the awnser is 75 because 45 ÷ 3 is 15 and so 2 more hours so I added 30 to the 45 and I got 75 I think that's right please correct me
3 0
3 years ago
Which of these relations are functions? Select ALL that apply. Pictures are the choices.
alexdok [17]

Answer:

The black, green, and blue charts are all functions

Step-by-step explanation:

3 0
3 years ago
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