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3 years ago

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:

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

6 0

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

Read 2 more answers

Robert drives 45 miles in 3 hours from New York City to New Jersey. How far will he drive in 5 hours?

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