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mezya [45]
3 years ago
11

ALGEBRA 1 HW< please help to give explanations

Mathematics
2 answers:
galben [10]3 years ago
7 0

Please refer the attached pictures.

Hope this helps! :D

Ronch [10]3 years ago
6 0

Answer:

See below

Step-by-step explanation:

a)

  • 11x^2 + x^2 = (4x + 8)(3x - 3)
  • 12x^2 = 12x^2 + 24x - 12x - 24
  • 12x - 24 = 0
  • 12x = 24
  • x = 2

b)

  • x/3 - x/9 = 6
  • 3x/9 - x/9 = 6
  • 2x/9 = 6
  • 2x = 54
  • x = 27

c)

  • 6^(x + 9) = 36^x
  • 6^(x + 9) = 6^(2x)
  • x + 9 = 2x
  • 2x - x = 9
  • x = 9

d)

  • 4/9 + 1/a = 2/3
  • 1/a = 2/3 - 4/9
  • 1/a = 6/9 - 4/9
  • 1/a = 2/9
  • a = 9/2

e)

  • √x + 3 = 6
  • x + 3 = 6^2
  • x = 36 - 3
  • x = 33

f)

1.2m - 0.2 = 3.8 + m

  • 1.2m - m = 3.8 + 0.2
  • 0.2m = 4
  • m = 4/0.2
  • m = 20

g)

  • (x + 12)^2 = 9
  • x + 12 = ± 3
  • x = ± 3 - 12
  • x = - 9, x = - 15
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If angle JKM= 15x-48 and angle L= 5x+12 and angle M= 40, find angle MKL
horrorfan [7]
JKM = M + L
15x - 48 = 40 + 5x + 12
10x - 48 = 52
10x = 100
x = 10
JKM = 15(10) - 48 = 102

180 = JKM + MKL
180 = 102 + MKL
MKL = 180 - 102 = 78
5 0
3 years ago
Todd and his brother robert are going to use 512 square feet of their backyard for skateboard ramps. the shape of the backyard i
Ahat [919]

The dimensions are 16  ft by 32 ft

The quadratic equation is w^2-256=0

We have given that,

Todd and his brother Robert are going to use 512 square feet of their backyard for skateboard ramps. the shape of the backyard is rectangular, with the length twice as long as the width.

<h3>What is the area of the rectangle?</h3>

The area of a rectangle is equal to

A=WL

Where L is the long side of the rectangle

W is the width side of the rectangle

in this problem we have

A=512ft^2

S0,512=LW -----> equation A

L=2W ------> equation B

substitute equation B in equation A

512=2W(W)

512=2w^2

2w^2-512=0

W^2=512/2

W=\sqrt(256)

W=16

Find the value of L

L=2W

L=2(16)

L=32ft

To learn more about rectangle visit:

brainly.com/question/25292087

#SPJ1

7 0
2 years ago
A dealer sells an air conditioner for ruppees 23000 and earns 15% on it . Find its cost price.​
earnstyle [38]

Answer:

20000

Step-by-step explanation:

115%-> 23000

100%->20000

8 0
3 years ago
Plz help me ill give you brainlist
Ivan
So, plug in what you're given and solve
 x is -2
(3x) * 9 
(3 (-2)) * 9
-6 * 9
-54

then 
27(-2)
-54
For the first it's the same

for the second
x is 0
(3x) * 9
(3 (0)) * 9
0 * 9
0

27x
27(0)
0
For the second it's the same

x is 4
(3x) * 9 
(3(4)) * 9
12 * 9
108

27x 
27(4)
108

The given expressions are equivalent. This was proved in the diagram. 

Hope this helps :)
7 0
3 years ago
What is 6x+7y+9-2y+8+x simplified
Vera_Pavlovna [14]

Answer:

5y+17+6x

Step-by-step explanation:

add each part together

6x+x=7x

7y-2y=5y

9+8=17

5 0
3 years ago
Read 2 more answers
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