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storchak [24]
3 years ago
14

(4y + 6) + (5n + 9) = ??? Simplify your answer

Mathematics
2 answers:
OlgaM077 [116]3 years ago
6 0
(4y + 6) + (5n + 9) = ?
4y + 6 + 5n + 9
5n + 4y + 15
elena55 [62]3 years ago
4 0

Answer:

5n+4y+15

Step-by-step explanation:

Eliminate redundant parentheses:

4y+6+5n+9

Add the numbers:

4y+15+5n

Rearrange terms:

5n+4y+15

Therefore, 5n+4y+15 is the answer.

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Which of the following are the solutions to quadratic equation x 2 − 8 x + 12 = 0?
Kobotan [32]

Answer:

X=6,x=2

Step-by-step explanation:

X2-8x+12

So we will have to factorise

So let's solve

X2-8x+12

X2-6x-2x+12

X(x-6)-2(x-6)

(X-2)(x-6)

X-2=0

X=2

X-6=0

X=6

X=6 or x=2

4 0
3 years ago
Find the mean, median, and mode of the data. Which reflects the best measure of the center? 43, 38, 37, 57, 57, 58, 45
Allushta [10]

ANSWER:

mean:47.8

mode:57

median:45

37, 38, 43, 45, 57, 57, 58

8 0
3 years ago
The length of a rectangle is half the width. The area is 25. What’s the perimeter
Pavel [41]

Answer:

the perimeter is 30

Step-by-step explanation:

ok so lets say this

width= x

length= 2x

the area is

A= wl

or

25 = x(2x)

25= 2x^2

5 = x thats the width so we know that if we double that we get the legnth so

the legnth is 10

the perimeter is defined as:

2l +2w =p

insert the width and legnth

2(5) + 2(10) = p

10+ 20= p

p= 30

6 0
3 years ago
What is 9% of 42 pls help fast!
joja [24]

Answer:

3.78

Step-by-step explanation:

Percentage solution with steps:

Step 1: We make the assumption that 9 is 100% since it is our output value.

Step 2: We next represent the value we seek with $x$.

Step 3: From step 1, it follows that $100\%=9$.

Step 4: In the same vein, $x\%=42$.

Step 5: This gives us a pair of simple equations:

$100\%=9(1)$.

$x\%=42(2)$.

Step 6: By simply dividing equation 1 by equation 2 and taking note of the fact that both the LHS

(left hand side) of both equations have the same unit (%); we have

$\frac{100\%}{x\%}=\frac{9}{42}$

Step 7: Taking the inverse (or reciprocal) of both sides yields

$\frac{x\%}{100\%}=\frac{42}{9}$

$\Rightarrow x=466.67\%$

Therefore, $42$ is $466.67\%$ of $9$.

4 0
3 years ago
Read 2 more answers
15x-6x+5xsquared -6x cubed - 2x squared +2(6x-2) please help me!!! (Show work)
Stels [109]

15x-6x+5x^2-6x^3-2x^2+2(6x-2)\\\\=15x-6x+5x^2-6x^3-2x^2+12x-4\\\\=(-6x^3)+(5x^2-2x^2)+(15x-6x+12x)+(-4)\\\\=-6x^3+3x^2+21x-4

6 0
4 years ago
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