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2 years ago

Solve this system by substitution. y = -6 y = -3x - 12 *Remember to write your answer as a coordinate point(x, y)

Mathematics

1 answer:

kirza4 [7]2 years ago

8 0

-6 = -3x -12
6 = -3x
x = -2

y = -3(-2) -12
y = 6 -12
y = -6
(-2,-6)

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The average of 10 numbers is -5. A new number is added to the list making the average -6. What is the new number?

Shtirlitz [24]

Answer:

- 16

Step-by-step explanation:

Average is calculated as

average = $\frac{total}{count}$

Thus for the given 10 numbers we have

$\frac{total}{10}$ = - 5 ( multiply both sides by 10 )

total = - 50

let the number added be x, then

$\frac{total+x}{11}$ = - 6 ( multiply both sides by 11 )

total + x = - 66, that is

- 50 + x = - 66 ( add 50 to both sides )

x = - 16

The new number is - 16

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3 years ago

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inna [77]

Answer:

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2 years ago

PLEEEASE HELLLLP!!!!!!! If x+7=2y and y=2x−1, what is the value of y?

viktelen [127]

Answer:

Step-by-step explanation:

We can add 1 to both sides of the second equation and divide by 2 to get

x = (y-1)/2

We can then substitute x in the first equation to get

(y-1)/2 + 7 = 2y

Multiply by 2

y-1 + 14 = 2y

Subtract y and combine like terms

y = 13

6 0

3 years ago

Given the function {f(x)=32-x}^{2}f(x)=32−x 2 , what is f(-5)f(−5)?

erastova [34]

Step-by-step explanation:

the description is very difficult to understand with special characters and potential typing errors.

I suspect the definition is

function(x) = 32 - x²

function(-5)function(-5) is then very easily calculated.

we need to calculate function(-5) and then square the result, as function(-5)function(-5) is just a simple multiplication of the function results.

function(-5) = 32 - (-5)² = 32 - 25 = 7

so,

function(-5)function(-5) = 7 × 7 = 49

4 0

2 years ago

Slope = 2; (-1,4)<br><br> Gghhhgggggghgehwjwjwjwjwjwjw

krok68 [10]

The slope intercept form is given as y = 2x + 6

The general expression for slope intercept form is given as:

y = mx + c

where, m = slope

c = intercept

The formula for slope intercept form when we have been given the coordinates of a point and slope is given as :

$(y-y_{1}) = m(x-x_{1})$ (1)

where ( $x_{1} , y_{1})$ = the coordinates of a point

m = slope of the line

putting the required values in equation (1) we get

(y - 4) = 2(x- (-1))

(y - 4) = 2(x+1) [As (-)*(-) = +]

y - 4 = 2x + 2

y = 2x + 2 + 4

y = 2x + 6

Thus the slope intercept form is y = 2x + 6

Learn more about slope intercept form here : brainly.com/question/19440459

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8 0

1 year ago

Solve this system by substitution. y = -6 y = -3x - 12 *Remember to write your answer as a coordinate point(x, y)​

Solve this system by substitution. y = -6 y = -3x - 12 *Remember to write your answer as a coordinate point(x, y)