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kotykmax [81]
3 years ago
6

Need help with 1 and two! Can you guys please help?

Mathematics
1 answer:
Cloud [144]3 years ago
6 0

2w-21.5=9, false,true,true,false

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I need help with this expression 8(3x+4)-20
Ierofanga [76]

Answer:24x+12

Step-by-step explanation:

8(3x+4)-20

24x+32-20

24x+12

8 0
4 years ago
Read 2 more answers
What is the median for the data shown below? Test Scores Stem Leaves 6 8 7 0 8 0, 6, 8, 8, 9 6, 6, 7, 7, 8, 8, 9 10 0, 0, 0, 0,
julsineya [31]

Answer: 7.5

Step-by-step explanation:

Line the numbers up in numerical order

0, 0, 0, 0, 0, 0, 0 , 6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 10, 32, 60, 92, 97, 100

Then find the middle number, since there is an even number there will be two middle number, those numbers are 8 and 7

You then divide 8 add 8+7 and divide by 2

which is 7.5

7 0
3 years ago
When point B (5, -1) is rotated 180º about the origin, its coordinate becomes (-5, 1).
Shtirlitz [24]

When a point (x,y) rotated 180⁰ about origin, the new point will be (-x, -y).

So,

if we have (5, -1), it should become (-5, 1).

So,

answer is true.

7 0
3 years ago
The sum of the first 5 terms of an AP is 30 and the sum of the four term from T6 to T9 (inclusive) is 69. Find the AP​
Ainat [17]

Answer: The AP = 1, ⁷/₂, 6, ¹⁷/₂, 11 ..............

Step-by-step explanation:

From the first statement,

S₅ = ⁵/₂(2a + ( n - 1 )d }    = 30

       5(2a  + 4d )d           = 60

       10a    + 20d             = 60

reduce to lowest term to easy calculation by dividing through by 10

                      a + 2d       = 6 -----------------------------------1

second statement

sum of the next 4 terms inclusive

T₉  = ⁹/₂(2a + 8d )   = 69

        9(2a  + 8d )    = 30 + 69

            18a + 72d   = 99 x 2

            18a + 72d   = 198

divide through by 18 to reduce to lowest time

                a  + 4d    = 11 ------------------------------------------2

Now solve the two equation simultaneously to find a and d

                 a + 2d = 6

                 a + 4d = 11

                     -2d  = -5

                          d = ⁵/₂.

Now substitute  for d to get a

               a  + 2(⁵/₂) = 6

                a + 5       = 6

                           a   = 6 - 5

                            a = 1.

Therefore the AP = 1 , ⁷/₂ , 6 , ¹⁷/₂ , 11 , ..............

7 0
3 years ago
Will give bianleast 10 ponits
Mrac [35]

Answer:

x + 8 + 12 + 11 = 43

Step-by-step explanation:

The perimeter is the length of the 4 sections of fencing.

If x represents the fourth section and the perimeter is 43, then

x + 8 + 12 + 11 = 43, that is

x + 31 = 43 ( subtract 31 from both sides )

x = 12

The length of the fourth section is 12 ft

3 0
4 years ago
Read 2 more answers
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