3 years ago

What is the value of the expression? −2.1(4.7+(−7.4)) HELPPP

Mathematics

2 answers:

skelet666 [1.2K]3 years ago

6 0

I think it's 5.67 or 5.7 rounded to the nearest tenth.

sergey [27]3 years ago

4 0

To solve this, follow the order of operations, PEMDAS (Parentheses-Exponents-Multiplication-Division-Addition-Subtraction)

So to start off add 4.7 and -7.4 together

-2.1(-2.7)

Then multiply -2.1 by -2.7. Since these are both negative, your answer will be positive.

5.67 is your answer.

Hope this helps!

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What do you predict the solution for the system 5x-6y=7 and 6x-7y=8 will be ?<br>

Alenkinab [10]

System of Linear Equations entered :

[1] 5x - 6y = 7
[2] 6x - 7y = 8
Graphic Representation of the Equations :

-6y + 5x = 7 -7y + 6x = 8

Solve equation [2] for the variable x

[2] 6x = 7y + 8

[2] x = 7y/6 + 4/3
// Plug this in for variable x in equation [1]

[1] 5•(7y/6+4/3) - 6y = 7
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8 0

3 years ago

1 = 1/4(2x + 8)<br> Need help finding the answer to this!!!

PolarNik [594]

1 = 1/4(2x+8)

1 = 1/2x + 2

1 - 2 = 1/2x

(-1) = 1/2x

x = (-1) : 1/2 = (-1) × 2/1 = (-2)

Answer : x = (-2)