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KiRa [710]
3 years ago
12

The square of a number added to 3 times the number is 28

Mathematics
2 answers:
Gre4nikov [31]3 years ago
7 0

3x28=84

Step-by-step explanation:

Naddika [18.5K]3 years ago
7 0

Answer: the number is 5

Step-by-step explanation:

Let the number be x , then the square of the number means x^{2} .

Therefore:

x^{2} +3=28

subtract 3 from both sides

x^{2} = 28 - 3

x^{2} =25

find the square root of both sides

x = 5

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Mr. Smith collected 200 eggs from his chickens on Saturday. When he sorted the eggs by their sizes, he found out tha 60% of the
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Answer: 120

Step-by-step explanation:

6 0
2 years ago
The number of males in the classroom is three more than twice the number of females. Of the total number of students is 57, how
dolphi86 [110]

Answer:

Step-by-step explanation:

Given that the number of males in the classroom is three more than twice the number of females.

the total number of students is 57

Let x be the no of males then no of females = 57-x

Also we have 3 more than twice no of females as

2(57-x)+3

This equals x

2(57-x)+3=x\\114-2x+3=x\\3x=117\\x=39

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6 0
3 years ago
The expression 21 - (2x + 3)2 + 4 (1 - 1) + z3 can be simplified into the form
mr Goodwill [35]

Answer:

A=z

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C=0

D=30

Step-by-step explanation:

First lets simply the equation

21 - (2x +3)2 + 4(1-1) + z^3

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21 - 2x^2 + 9 + z^3

- 2x^2 + z ^3 + 30

This means that:

A=z

B=-2

C=0

D=30

5 0
3 years ago
What does -22 belong to
Len [333]

Answer:

it's part of the real number system

it's a rational number

it's an integer

Step-by-step explanation:

6 0
3 years ago
What is 5/6 times 12
viktelen [127]
5/6 × 6 = 5 so 5/6 times 12= 10 
8 0
3 years ago
Read 2 more answers
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