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3 years ago

What is the value of 6x - 3y if x = 5 and y = -1?

Mathematics

2 answers:

Sergio [31]3 years ago

7 0

Answer:

G. 33

Step-by-step explanation:

$6x - 3y \\ 6(5) - 3( - 1) \\ 30 + 3 \\ 33$

Arisa [49]3 years ago

3 0

Now, if x = 5 and y = -1

6(5) -3(-1)

= 30+3

= 33

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Can someone please help i posted this question already and it got ingored

coldgirl [10]

The answer is C, since the number in the parenthesis represent what is being multiplied every year

3 0

3 years ago

What is the equation of a circle with center (−8, 3) and radius 8?

Genrish500 [490]

Answer:

x^2 + y^2 + 16x + 6y + 9 = 0

Step-by-step explanation:

Using the formula for equation of a circle

(x - a)^2 + (y + b)^2 = r^2

(a, b) - the center

r - radius of the circle

Inserting the values given in the question

(-8,3) and r = 8

a - -8

b - 3

r - 8

[ x -(-8)]^2 + (y+3)^2 = 8^2

(x + 8)^2 + (y + 3)^2 = 8^2

Solving the brackets

( x + 8)(x + 8) + (y +3)(y+3) = 64

x^2 + 16x + 64 + y^2 + 6y + 9 = 64

Rearranging algebrally,.

x^2 + y^2 + 16x + 6y + 9+64 - 64 = 0

Bringing in 64, thereby changing the + sign to -

Therefore, the equation of the circle =

x^2 + y^2 + 16x + 6y + 9 = 0

7 0

3 years ago

Please help and show work

mylen [45]

7.B
$\sqrt{\pi } = 1.772$
$\pi = 3.142$
$2 \times \pi = 6.283$
${\pi}^{2} = 9.869$

9.A
3/2=1.5

8. F
2times pi =6.283
square root of 50= 7.071
pi squared/2= 3.289

10.H
1/7= .143
which means it can't be f or g.

8 0

3 years ago

|5x|-2=18 helps love this problem please help

drek231 [11]

Answer:

x = 4

Step-by-step explanation:

The absolute value of 5x is still 5x.

5x - 2 = 18

Add 2 to both sides

5x = 20

Divide both sides by 5

x = 4

7 0

3 years ago

Read 2 more answers

If the number of bacteria in a colony doubles every 210 minutes and the population is currently 8,000 bacteria, what will the po

Stells [14]

Answer:

D is the answer

64,000 exponential function

Step-by-step explanation:

64,000 exponential function

The number of bacteria in a colony doubles every 210 minutes.

The population of bacteria = 8000

Determine how many times the population will double.

$\frac{630}{210}$

= 3

Multiply the population by 2 a total of 3 times.

8000 × 2³ = 64,000

8 0

3 years ago