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kherson [118]
1 year ago
7

This is difficult for me pls help out

Mathematics
1 answer:
Cloud [144]1 year ago
8 0

Answer:

(-0.4)(-2)+(-0.4)(-9)

Step-by-step explanation:

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Can you please help????????
OlgaM077 [116]

Answer:

9x - 8

Step-by-step explanation:

the perimeter is the sum of the sides, hence

perimeter = 5x - 2 + 3x + 4 + x - 10 ( collect like terms )

                = 9x - 8 ← polynomial of degree 1


5 0
3 years ago
Answers asap; greatly appreciated
vagabundo [1.1K]
I believe the answer is D
6 0
4 years ago
Solve the system of equations.<br> – 7x – 10y = 45<br> -3x - 5y = 25<br> x =<br> Y =
irina [24]

Answer:

The solution is (-5, -2).

Step-by-step explanation:

We'll use "elimination by addition and subtraction."

Multiply the second row by -2.  Our system

– 7x – 10y = 45

-3x - 5y = 25

becomes:

– 7x – 10y = 45

+6x  + 10 y = -50

-------------------------

  -x             =  5, so that x = -5.

Substituting -5 for x in the second equation results in

-3(-5) - 5y = 25, or  15 - 5y = 25.  This reduces to

-5y = 10, so that y must be -2.

The solution is (-5, -2).

4 0
3 years ago
Are the expressions –0.5(3x + 5) and –1.5x + 2.5 equivalent? Explain why or why not.
Nadya [2.5K]
We can check this two ways: distributing the -0.5, and plugging in a number for x.

First, we can check this by distributing the -0.5.  Our equation becomes:

-1.5x -2.5 = -1.5x + 2.5

Clearly, this is not true.  We can show this one more time by plugging in a number for x.  I will use 2.

-0.5(3*2+5)=-1.5*2+2.5

Now, we evaluate both sides and see if they are equal.

-3 - 2.5 = -3 + 2.5

-5.5 = 0.5

Clearly, this is not true.  These expressions are not equivalent.
4 0
3 years ago
Read 2 more answers
Divide and simplify
slamgirl [31]

Answer:

7/9y+441/567

Step-by-step explanation:

y^2-49/81y+567÷y-7/63

=y^2-49/81y+567×63/y-7

=(y-7)(y+7)/81y+567×63/y-7

=(y+7)×63/81y+567

=63y+441/81y+567

=7/9y+441/567

6 0
4 years ago
Read 2 more answers
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