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mezya [45]
3 years ago
11

Evaluate 4(a2 + 2b) - 2b when a = 2 and b = –2

Mathematics
2 answers:
amid [387]3 years ago
5 0
First you simply have to substitute 2 in replace of all the a's, and -2 in replace of all of the b's

4((2)2+2(-2))

Then you want to follow the order of operations, PEMDAS (Parantheses-Exponent-Multiplication-Division-Addition-Subtraction), and multiply within the parantheses.

4(4+(-4))

Next you will add within the parantheses (So add the 4 and -4 together)

4(0)

Lastly multiply

0

Your answer is 0

Hope this helps!
aivan3 [116]3 years ago
3 0

Answer:

4

Step-by-step explanation:

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Please help I’m being timed on this! ://
Llana [10]

Answer:

its going to be D (x,y) - (x-2,y-4)

Step-by-step explanation:

3 0
3 years ago
can someone help me with these??? I really appreciate it!!! I did one of them already. ( if the first one is wrong can someone p
Anestetic [448]

Answer:

the answer to your questions are below

Step-by-step explanation:

1.-

          x = 3x - 60

        3x - x = 60

            2x = 60

             x = 30

            A = 30

2.-  

        - x + 26 = 2x - 10

       2x + x = 26 + 10

       3x = 36

        x = 36/3

        x = 12

        D =  2(12) - 10

        D = 24 - 10

        D = 14

3.-

    5x + 10 = 7x - 12

   7x - 5x = 10 + 12

          2x = 22

          x = 22/2

          x = 11

4.-   4x + 7 = 5(x - 4)

      4x + 7 = 5x - 20

      5x - 4x = 7 + 20

            x = 27

5.- 6(x - 2) = 3x + 30

    6x - 12 = 3x + 30

    6x - 3x = 30 + 12

           3x = 42

           x = 14

 DHG = 6(14 - 2)

DHG = 6(12)

DHG = 72

7 0
2 years ago
The measure of angle 3 is 42°.<br><br><br> What is the measure of angle 1 in degrees?
Zolol [24]

Answer:

48 degrees

Step-by-step explanation:

If you take away the line separating angles 1 and 5, you will get a 90 degree angle. Because angles 3 and 5 are corresponding angles, you will subtract 90-42. This gives you your answer of 48 degrees

Have a good day!

8 0
3 years ago
Read 2 more answers
For Problems 9-10, simplify the expressions using properties of operations. 9. (4x – 7.2) + (-5.3x-8) 10. (t - 1) – (-7t + 2)
mafiozo [28]

The given expression is : (4x – 7.2) + (-5.3x-8)

Simplify :

Open the brackets :

(4x – 7.2) + (-5.3x-8) = 4x - 7.2 - 5.3x - 8

Arrange the variable and constant terms together :

(4x – 7.2) + (-5.3x-8) = 4x - 5.3x - 8 - 7.2

Solve the variable and constant terms together :

(4x – 7.2) + (-5.3x-8) = - 1.3x - 15.2

Since, the variable and constant term can not solve together so the above equation is the simplest form:

(4x – 7.2) + (-5.3x-8) = - 1.3x - 15.2

Answer : (4x – 7.2) + (-5.3x-8) = - 1.3x - 15.2

7 0
8 months ago
What is the area of a section of pavement that is 20 ft wide and 60 yd​ long? give your answer in square feet?
VLD [36.1K]

20 * 60 = 1200

1200 yd^2

7 0
3 years ago
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