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3 years ago

Y=-x+2 y=-5x-6 What is y and x

1 answer:

6 0

To solve this system of equations, since y is already isolated in both equations, you can set the expressions to equal each other to solve for x:

-x + 2 = - 5x - 6
-x + 5x = -6 - 2
4x = -8
x = -2

Now that we have x, we can substitute it into one of the equations to find y:

y = -(-2) + 2
y = 2 + 2
y = 4

The last step is to substitute both values into both equations to see if they are correct:

4 = -(-2) + 2 --> 4 = 2 + 2 <--True
4 = -5(-2) - 6 --> 4 = 10 - 6 <--True

Answer:
x = -2
y = 4

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The weekly incomes of a large group of executives are normally distributed with a mean of $2,000 and a standard deviation of $10

cestrela7 [59]

Let X be the weekly incomes of a large group of executives. The weekly incomes of a large group of executives follows Normal distribution with mean $2000 and standard deviation $100.

μ =2000, σ =100

We have to find z score for income $2100 i.e x=2100

Z = $\frac{x-mean}{standard deviation}$

= $\frac{2100 - 2000}{100}$

Z = 100/100

Z = 1

The z score for income $2100 is 1

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3 years ago

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andreev551 [17]

Answer:

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Step-by-step explanation:

None

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2 years ago

15. Given Square ABCD, if AB = 2x + 4 and

True [87]

Answer:

equation : 2x + 4 = 3x - 5

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2 years ago

In your notebook, set up the following subtraction in a vertical format and select the correct answer.

prohojiy [21]

Answer:

$4p^{2} +6p-8$

Step-by-step explanation:

Remember these rules for addition, substraction, multiplication or division:

Addition

+ + = +

- - = -

Big + number - = +

Big -number + = -

Substraction

change the sign!

And follow the rules for addition

Multiplication or division

+ + = +

- - = +

+ - = -

Now for the exercise

$2p^{2} + 3p - 4$

- ( $- 2p^{2} -3p +4$ )

Change the signal

$2p^{2} + 3p - 4$

( $+2p^{2}+3p-4$ )

$4p^{2} + 6p -8$

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2 years ago

What is the surface area of a square pyramid with a base perimeter of 60 inches and a slant height of 13 inches? 450 in. 2 O 780

kozerog [31]

Answer:

total area = 615 sq. in.

Step-by-step explanation:

There are 4 triangles that make up the lateral area. The base of each triangle is 60/4 = 15 in. and the height of each triangle is 13 in. So, the area of one triangle = .5bh = .5(15)(13) = 97.5. The lateral area = 4(97.5) = 390. The area of the square base is 15(15) = 225. The total area = 390 + 225 = 615 sq. in.

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2 years ago