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Harman [31]
3 years ago
12

Someone please help me

Mathematics
1 answer:
DanielleElmas [232]3 years ago
4 0

Answer:

Correct Work

5(x+9) - 3x +4

5x+ 45- 3x+ 4

5x-3x +45+4

2x+49

Mistake made:

  1. The student didn't grouped/combined the like terms first
  2. 3x was supposed to be subtracted from 5x
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There are two pieces of wires, each of length 66 cm. One wire is bent into a square and the other wire is bent into a circle. Fi
antiseptic1488 [7]

Answer:

Area of Circle  = 346.5 cm².

Area of square = 272.25 cm ² .

Step-by-step explanation:

So , 2πR = 66

2 × 22 / 7 × R = 66

R comes out is 21/2 cm .

Area of Circle = 22/7 × 21/2 × 21/2 = 33×21/2

= 693 / 2 = 346.5 cm².

If bent into the shape of a square ;

4 a = 66

a = 33/2 . ( Side of a square )

Area of square = a ² = 33×33/4 = 1089/4

= 272.25 cm ² .

6 0
2 years ago
Dj is preparing a playlist 16 songs how many different ways can the Dj arrange the first five song
Serhud [2]

Answer:

5765760

Step-by-step explanation:

We will use the Fundamental Counting Principle to find the answer. Simply determine the number of choices for each position and multiply.

For the first choice there are 16 choices. Then, the number is reduced by 1 each time.

So to get the answer, we have to multiply the numbers below:

16 x 15 x 14 x 13 x 12 x 11

7 0
4 years ago
Read 2 more answers
In ABC, CT is a median. What is the measure of AB?
Step2247 [10]

Answer:

AB = 102

Step-by-step explanation:

the median CT bisects the side AB at T , then

BT = AT , that is

7x + 9 = 5x + 21 ( subtract 5x from both sides )

2x + 9 = 21 ( subtract 9 from both sides )

2x = 12 ( divide both sides by 2 )

x = 6

then

AB = 5x + 21 + 7x + 9 = 12x + 30 = 12(6) + 30 = 72 + 30 = 102

4 0
2 years ago
Joan Likes to watch the birds in her yard. one morning she notices that there are twice as many Robins as bluejays. If she count
geniusboy [140]
<span>Find the number of bluejays bird and robins birds as joan counted it
=> the number of Robins is twice as bluejay
=> Robins = 2X
=> The number of bluejay is about to know:
=> Bluejay = X
The total number of birds is 21.
=> 2X + X = 21
=>  3x = 21
=> 3x / 3 = 21 / 3
=> x = 7
Thus the number of bluejay is 7
=> Robin = 2(7)
=> Robin = 14
Thus the number of Robin is 14</span>



7 0
3 years ago
Hi i need help solving this problem and explaing how i got the answer step by step please anyone
Cerrena [4.2K]

Answer:

-161

Step-by-step explanation:

-11(3)-16(8)​

PEMDAS

P there are no parentheses

E  there are no exponents

MD  Multiply and divide from left to right

-33 -128

AD add and subtract from left to right

-161

7 0
3 years ago
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