Solve 5x − 6y = −38
3x + 4y = 0

Answers

Answer 1

Answer: 5x - 6y = -38 . . . . . (1)
3x + 4y = 0 . . . . . (2)

(1) x 3 => 15x - 18y = -114 . . . . . (3)
(2) x 5 => 15x + 20y = 0 . . . . . . (4)

(3) - (4) => -38y = -114 => y = -114/-38 = 3

From (2), 3x + 4(3) = 0 => 3x + 12 = 0 => 3x = -12 => x = -12/3 = -4

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|3k-2|=2|k+2| what is k

Answers

Answer:

k = 6

Step-by-step explanation:

|3k-2| = 2|k+2|

3k - 2 = 2k + 4

k - 2 = 4

k = 6

A greenhouse that specializes in growing carnations is divided into sections. The number of plants in each section depends on the number of sprinklers in that section.There are y(5y − 4) red carnation plants and (9 + y)2 white carnation plants in a section with y sprinklers.

Which simplified expression represents the total number of red and white carnation plants in a section with y sprinklers?
5y2 + 18y +77
5y4 + 14y + 81
6y2 + 14y + 81
6y2 + 18y + 77

Answers

Answer:

C. $6y^2+14y+81$

Step-by-step explanation:

We have been given that the expression $y(5y-4)$ represents number of red carnation plants and expression $(9+y)^2$ represents number of white carnation plants in a section with y sprinklers in a green house.

To find the simplified expression that represents the total number of red and white carnation plants in a section with y sprinklers, we will add our both expressions.

$y(5y-4)+(9+y)^2$

Upon distributing y on 1st expression we will get,

$5y*y-4y+(9+y)^2$

$5y^2-4y+(9+y)^2$

Upon expanding the perfect square we will get,

$5y^2-4y+(9^2+2*9y+y^2)$

$5y^2-4y+(81+18y+y^2)$

$5y^2-4y+81+18y+y^2$

Now, we will combine like terms.

$5y^2+y^2-4y+18y+81$

$6y^2+14y+81$

Therefore, option C is the correct choice.

Good evening,

y(5y-4)+(9+y)²=5y²-4y+81+18y+y²
=6y²+14y+81

Simplify.

|–4.1| =

Thanks!

Answers

|-4.1|

= 4.1

I hope that's help !

Round your answer to the nearest hundredth.
If m
17.32
6.93
14
9.99

Answers

if a is 3cm and tan is 0.75 what is b?

All of the following expressions represent the sum of n and itself, except _____A.) n + n
B.) 2n
C.) n²

Answers

All of the following expressions represent the sum of n and itself, except n² so option (C) will be correct.

What is an expression?

An expression is a combination of some mathematical symbol such that arithmetic operator and variable such that all are constrained and create an equation.

In other meaning, expression is very useful to determine the end or root value of constraint.

For example 3x +5y

The constraint of expression is represented as = or <, >.

The expression n + n is the sum of n and n(itself).

The expression 2n = n + n is the sum of n and n(itself).

The expression n² = n × n is the multiplication of two n, not a sum so it will not sum of n and itself.

Hence "All of the following expressions represent the sum of n and itself, except n²".

To learn more about expression,

brainly.com/question/14083225

#SPJ2

c. is the correct answer

What is the measure of RPQ