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GenaCL600 [577]
3 years ago
15

Solve: 2.8 X +12=-1.4 X -9

Mathematics
1 answer:
professor190 [17]3 years ago
7 0

Answer:

X= -5

Step-by-step explanation:

Expression: 2.8X+12=-1.4X-9

Order it: 12+9=-1.4X-2.8X

Simplification: 21=-4.2X

Results: x=-5

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The basketball boosters are selling school t-shirts for 20 dollars and pants for 45 dollars. Last week they sold 100 items and c
lana66690 [7]

He sold 76 shirts and 24 pants.

Step-by-step explanation:

Given,

Cost of one t-shirt = $20

Cost of one pants = $45

Total items sold = 100

Total sales = 2600

Let,

x be the number of t-shirts

y be the number of pants

According to given statement;

x+y=100    Eqn 1

20x+45y=2600   Eqn 2

Multiplying Eqn 1 by 20

20(x+y=100)\\20x+20y=2000\ \ \ Eqn\ 3

Subtracting Eqn 3 from Eqn 2

(20x+45y)-(20x+20y)=2600-2000\\20x+45y-20x-20y=600\\25y=600

Dividing both sides by 25

\frac{25y}{25}=\frac{600}{25}\\y=24

Putting in Eqn 1

x+24=100\\x=100-24\\x=76

He sold 76 shirts and 24 pants.

Keywords: linear equations, subtraction

Learn more about linear equations at:

  • brainly.com/question/289820
  • brainly.com/question/2826639

#LearnwithBrainly

3 0
3 years ago
Multiply<br> ( 2 x – y ) ( 3 x + y )
Nikitich [7]
Answer: 6x^2-xy-y^2.

Tell me if you want step by step!!

Hope this helped. :)
3 0
3 years ago
Read 2 more answers
NEED HELP ASAP
Gelneren [198K]

Answer:

3/4 mile

Step-by-step explanation:

A = l *w\\\frac{1}{2} = \frac{2}{3} * w\\w = \frac{3}{2} * \frac{1}{2}\\w = 3/4 mile

6 0
3 years ago
Read 2 more answers
8-2x=5-4x<br> 4+3x=2-2x<br> 2(x-1)+2(3x-1)=0
vodka [1.7K]

Answer:

See the below part

Step-by-step explanation:

1)

8 - 2x = 5 - 4x

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

=> 3 = -2x

=> 3/-2 = x

=> -3/2 = x

2)

4 + 3x = 2 - 2x

=> 4 - 2 = -2x - 3x

=> -2 = -5x

=> 2 = 5x

=> 2/5 = x

3)

2(x - 1) + 2(3x - 1) = 0

=> 2x - 2 + 6x - 2 = 0

=> 8x - 4 = 0

=> 8x = 4

=> x = 4/8

=> x = 1/2

8 0
2 years ago
Read 2 more answers
Which graph shows the solution set of x^2+4x-12/x 0
kupik [55]
As shown in the figure below the answer is the last option:

(-6, 0) \cup (2, +\infty)

The roots of the polynomial in the denominator are:

x_{1}=-6
x_{2}=2

So, the inequality can be written as follows:

\frac{(x-2)(x+6)}{x}\ \textgreater \ 0

From this inequality we can study the signs and get the same conclusion just as shows the graph.



6 0
3 years ago
Read 2 more answers
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