Please someone work out x - 2/7 = 5, №18010619, 24.10.2020 02:21

Mathematics

Step-by-step answer

P Answered by Master

Solution:

We know that:

Given equation: $x - \frac{2}{7} = 5$ 1. Add 2/7 both sides. $x - \frac{2}{7} = 5$ => $x - \frac{2}{7} + \frac{2}{7} = 5 + \frac{2}{7}$ => $x = 5 + \frac{2}{7}$ 2. Make the denominators equivalent.=> $x = 5 + \frac{2}{7}$ => $x = \frac{5 \times 7}{7} + \frac{2}{7}$ => $x = \frac{35}{7} + \frac{2}{7}$ 3. Simplify the equation and find the value of x.=> $x = \frac{35}{7} + \frac{2}{7}$ => $\bold{x = \frac{37}{7} = \frac{35}{7} + \frac{2}{7} = 5 + \frac{2}{7} = 5\frac{2}{7} }$

Mathematics

Can someone explain to me how to do problems like x - 2/5 = 7 and x + 4/5 = 11? i don t really need the answers, i just can t understand : /// idk how to find the value of x s yea

Step-by-step answer

P Answered by PhD

1

x=37/5 ; x=51/5

Step-by-step explanation:

x - 2/5= 7

here,

x-2/5

LCM of denominators(1 &5)=5

5 (LCM of denominators) divided by the denominator of x(which is 1)= 5/1 =5

then,

5 multiply with numerator of x (which is x) = 5x

again,

5 (LCM of denominators) divided by the denominator of 2/5(which is 5) = 5/5=1

then,

1 multiply with numerator of 2/5 (which is 2)= 1 x 2 =2

so,

the fraction is,

(5x-2)/7

which is = 7

so,

(5x-2)=35 [multiplied by 5 on both site ]

5x=35+2 [add 2 on both site]

5x=37

x=37/5 [divided by 5 on both site]

similarly,

x + 4/5 = 11

=>(5x+4)/5=11

=>5x+4=55 [multiplied by 5 on both site ]

=>5x=55-4 [subtraction by 4 on both site]

=>5x=51

=>x=51/5 [divided by 5 on both site]

Mathematics

Can someone explain to me how to do problems like x - 2/5 = 7 and x + 4/5 = 11? i don t really need the answers, i just can t understand : /// idk how to find the value of x s yea

Step-by-step answer

P Answered by PhD

1

x=37/5 ; x=51/5

Step-by-step explanation:

x - 2/5= 7

here,

x-2/5

LCM of denominators(1 &5)=5

5 (LCM of denominators) divided by the denominator of x(which is 1)= 5/1 =5

then,

5 multiply with numerator of x (which is x) = 5x

again,

5 (LCM of denominators) divided by the denominator of 2/5(which is 5) = 5/5=1

then,

1 multiply with numerator of 2/5 (which is 2)= 1 x 2 =2

so,

the fraction is,

(5x-2)/7

which is = 7

so,

(5x-2)=35 [multiplied by 5 on both site ]

5x=35+2 [add 2 on both site]

5x=37

x=37/5 [divided by 5 on both site]

similarly,

x + 4/5 = 11

=>(5x+4)/5=11

=>5x+4=55 [multiplied by 5 on both site ]

=>5x=55-4 [subtraction by 4 on both site]

=>5x=51

=>x=51/5 [divided by 5 on both site]

Mathematics

What is the sum or difference? 1. 2x^4 - 8x^4 (a). -6x^8 (b). -6x^4 (c). -16x^4 (d). -16x^8 what is the sum or difference? 2. 6y^5 - 9y^5 (a). -3y^10 (b). 15y^5 (c). -54y^5 (d). -3y^5 3. write the polynomial in standard form. then name the polynomial based on its degree and number of terms. 6 - 12x + 13x^2 - 4x^2 (a). 9x^2 - 12x; quadratic binomial (b). 9x^2 - 12x + 6; quadratic trinomial (c). -3x^2 + 6; quadratic binomial (d). 9x^2 - 12x - 6; cubic trinomial 4. a biologist studied the populations of common guppies and endler s guppies over a 6-year

Step-by-step answer

P Answered by Specialist

10

1. Ans: Option (B) -6x^4

Explanation:
Given: 2x^4 - 8x^4

Take the common out:
=> x^4(2 - 8)

Hence: =>

[/tex] (Option B)

2. Ans: Option (D) -3y^5

Explanation:
Given: 6y^5 - 9y^5

Take the common term(s) out:
=> y^5(6-9)

Hence: =>

(Option D)

3. Ans: Option (B) 9x^2 - 12x + 6

quadratic trinomial

Explanation:
Given: 6 - 12x + 13x^2 - 4x^2

The standard form of polynomial function must have the highest powered value at the start, then the second highest and so on.

=> 13x^2 - 4x^2 - 12x + 6

=>

(Option B)

4. Ans: Option (C) 7.3x^2 + 0.8x + 1.3

Explanation:
In order to find the total number of Common and Endler's guppies, you need to add both Common and Endler's guppies' polynomials, as follows:

Common guppies: 3.1x^2 +6.0x + 0.3

Endler's guppies: 4.2x^2 - 5.2x + 1.0

(add both)
-----------------------------------------------------------------
Total number: 7.3x^2 +0.8x + 1.3

-----------------------------------------------------------------
Hence the ans is Option(C) 7.3x^2 + 0.8x + 1.3

5. Ans: Option (D) $2x^2(133 - 18 \pi )$

Explanation:
First let's find the total area of the yard:
Total Area of the Yard = 14x * 19x = 266x^2

Now the area of the circular fountain:
Area of the Circular Fountain = $\pi r^2$
Since, r=6x
Therefore,
Area of the Circular Fountain = $\pi (6x)^2 = 36 \pi x^2$

Now the final Area of the yard would be:
Final area of the Yard = Total Area of the Yard - Area of the Circular Fountain
Final area of the Yard = 266x^2

- $36 \pi x^2$
=> Final area of the Yard = $2x^2(133 - 18 \pi)$ (Option D)

6. Ans: Option (A) 56x^2

Explanation:
First let's find the total area of the lot:
Total Area of the lot= 6x * 10x = 60x^2

Now the area of the stadium:
Area of the stadium = 1x * 4x = 4x^2

Now the final Area of the lot would be:
Final area of the lot= Total Area of the lot - Area of the stadium
Final area of the lot= 60x^2

-

=> Final area of the lot = 56x^2

(Option A)

-i

Mathematics

What is the sum or difference? 1. 2x^4 - 8x^4 (a). -6x^8 (b). -6x^4 (c). -16x^4 (d). -16x^8 what is the sum or difference? 2. 6y^5 - 9y^5 (a). -3y^10 (b). 15y^5 (c). -54y^5 (d). -3y^5 3. write the polynomial in standard form. then name the polynomial based on its degree and number of terms. 6 - 12x + 13x^2 - 4x^2 (a). 9x^2 - 12x; quadratic binomial (b). 9x^2 - 12x + 6; quadratic trinomial (c). -3x^2 + 6; quadratic binomial (d). 9x^2 - 12x - 6; cubic trinomial 4. a biologist studied the populations of common guppies and endler s guppies over a 6-year

Step-by-step answer

P Answered by Specialist

10

1. Ans: Option (B) -6x^4

Explanation:
Given: 2x^4 - 8x^4

Take the common out:
=> x^4(2 - 8)

Hence: =>

[/tex] (Option B)

2. Ans: Option (D) -3y^5

Explanation:
Given: 6y^5 - 9y^5

Take the common term(s) out:
=> y^5(6-9)

Hence: =>

(Option D)

3. Ans: Option (B) 9x^2 - 12x + 6

quadratic trinomial

Explanation:
Given: 6 - 12x + 13x^2 - 4x^2

The standard form of polynomial function must have the highest powered value at the start, then the second highest and so on.

=> 13x^2 - 4x^2 - 12x + 6

=>

(Option B)

4. Ans: Option (C) 7.3x^2 + 0.8x + 1.3

Explanation:
In order to find the total number of Common and Endler's guppies, you need to add both Common and Endler's guppies' polynomials, as follows:

Common guppies: 3.1x^2 +6.0x + 0.3

Endler's guppies: 4.2x^2 - 5.2x + 1.0

(add both)
-----------------------------------------------------------------
Total number: 7.3x^2 +0.8x + 1.3

-----------------------------------------------------------------
Hence the ans is Option(C) 7.3x^2 + 0.8x + 1.3

5. Ans: Option (D) $2x^2(133 - 18 \pi )$

Explanation:
First let's find the total area of the yard:
Total Area of the Yard = 14x * 19x = 266x^2

Now the area of the circular fountain:
Area of the Circular Fountain = $\pi r^2$
Since, r=6x
Therefore,
Area of the Circular Fountain = $\pi (6x)^2 = 36 \pi x^2$

Now the final Area of the yard would be:
Final area of the Yard = Total Area of the Yard - Area of the Circular Fountain
Final area of the Yard = 266x^2

- $36 \pi x^2$
=> Final area of the Yard = $2x^2(133 - 18 \pi)$ (Option D)

6. Ans: Option (A) 56x^2

Explanation:
First let's find the total area of the lot:
Total Area of the lot= 6x * 10x = 60x^2

Now the area of the stadium:
Area of the stadium = 1x * 4x = 4x^2

Now the final Area of the lot would be:
Final area of the lot= Total Area of the lot - Area of the stadium
Final area of the lot= 60x^2

-

=> Final area of the lot = 56x^2

(Option A)

-i

Mathematics

Match the following. 1. 8 = 8 transitive 2. if x = y, then y = x distributive 3. if x = y and y = 7, then x = 7 multiplicative inverse 4. 6 + 2 = 2 + 6 property of zero 5. 5 ∙ 2 = 2 ∙ 5 associative - addition 6. 10 + (3 + 2) = (10 + 3) + 2 commutative - multiplication 7. 6(3 ∙ 5) = (6 ∙ 3)5 symmetric 8. 4(8 + 1) = 4 ∙ 8 + 4 ∙ 1 reflexive 9. 6 + 0 = 6 identity - addition 10. 8 ∙ 1 = 8 identity - multiplication 11. ∙ 2 = 1 associative - multiplication 12. 5 ∙ 0 = 0 commutative - addition someone !

Step-by-step answer

P Answered by PhD

28

1. 8 = 8 => refrexive

2. If x = y, then y = x => symmetric

3. If x = y and y = 7, then x = 7 => transitive

4. 6 + 2 = 2 + 6 => commutative - addition

5. 5 ∙ 2 = 2 ∙ 5 => commutative - multiplication

6. 10 + (3 + 2) = (10 + 3) + 2 => associative - addition

7. 6(3 ∙ 5) = (6 ∙ 3)5 => associative - multiplication

8. 4(8 + 1) = 4 ∙ 8 + 4 ∙ 1 => distributive

9. 6 + 0 = 6 => identity - addition

10. 8 ∙ 1 = 8 => identity - multiplication

11. 1/2 ∙ 2 = 1 => multiplicative inverse

12. 5 ∙ 0 = 0 => property of zero

SAT

Ineed i am studying for my sat and i have the answer to the problems can someone just explain and show me how to get them i don t want you have me figure them out my self because i am on a tight schedule and won t be able to respond. ! 1.) if 8x + 6=6m, what is the value of 4x + 3 in terms of m?3m 2.)3x +4y=18 y= 3/2x which of the following ordered pairs (x,y) is a solution of the system of equations above?(2,3) 3.) which of the following is equivalent to 3x +4/12?x/4 + 1/3 4.) if x-3 is a factor of the expression x^2 +kx + 12, what is the value

Step-by-step answer

P Answered by Master

29

Ans1) 8x+6=6m then u will take the common factor of 8x+6 which is 2(4x+3) so it will be 2(4x+3)=6m then u should find 4x+3 so u will divide both by 2 and it will be 4x+3=3m so the answer is 3m

Mathematics

Match the following. 1. 8 = 8 transitive 2. if x = y, then y = x distributive 3. if x = y and y = 7, then x = 7 multiplicative inverse 4. 6 + 2 = 2 + 6 property of zero 5. 5 ∙ 2 = 2 ∙ 5 associative - addition 6. 10 + (3 + 2) = (10 + 3) + 2 commutative - multiplication 7. 6(3 ∙ 5) = (6 ∙ 3)5 symmetric 8. 4(8 + 1) = 4 ∙ 8 + 4 ∙ 1 reflexive 9. 6 + 0 = 6 identity - addition 10. 8 ∙ 1 = 8 identity - multiplication 11. ∙ 2 = 1 associative - multiplication 12. 5 ∙ 0 = 0 commutative - addition someone !

Step-by-step answer

P Answered by PhD

28

1. 8 = 8 => refrexive

2. If x = y, then y = x => symmetric

3. If x = y and y = 7, then x = 7 => transitive

4. 6 + 2 = 2 + 6 => commutative - addition

5. 5 ∙ 2 = 2 ∙ 5 => commutative - multiplication

6. 10 + (3 + 2) = (10 + 3) + 2 => associative - addition

7. 6(3 ∙ 5) = (6 ∙ 3)5 => associative - multiplication

8. 4(8 + 1) = 4 ∙ 8 + 4 ∙ 1 => distributive

9. 6 + 0 = 6 => identity - addition

10. 8 ∙ 1 = 8 => identity - multiplication

11. 1/2 ∙ 2 = 1 => multiplicative inverse

12. 5 ∙ 0 = 0 => property of zero

SAT

Ineed i am studying for my sat and i have the answer to the problems can someone just explain and show me how to get them i don t want you have me figure them out my self because i am on a tight schedule and won t be able to respond. ! 1.) if 8x + 6=6m, what is the value of 4x + 3 in terms of m?3m 2.)3x +4y=18 y= 3/2x which of the following ordered pairs (x,y) is a solution of the system of equations above?(2,3) 3.) which of the following is equivalent to 3x +4/12?x/4 + 1/3 4.) if x-3 is a factor of the expression x^2 +kx + 12, what is the value

Step-by-step answer

P Answered by Specialist

29

Ans1) 8x+6=6m then u will take the common factor of 8x+6 which is 2(4x+3) so it will be 2(4x+3)=6m then u should find 4x+3 so u will divide both by 2 and it will be 4x+3=3m so the answer is 3m

Mathematics

Can someone confirm my work? f(x) = 4x2 − 7x − 15 part a finding x-intercepts: f(x) = 4x^2 − 7x − 15 0 = 4x^2 − 7x − 15 a = 4, b = -7, c= -15 a * c = -60 -12 * 5 = -60 -12 + 5 = -7 (4x + 5)(4x -12) 4x^2 - 12x | + 5x -15 4x(x - 3) + 5(x - 3) (x - 3)(4x +5) x = 3 x = -1.25 or -5/4 part b finding vertex: minimum point (x1 + x2)/2 (3 -1.25)/2 = 0.875 f(x) = 4x^2 − 7x − 15 f(0.875) = 4(0.875)^2 − 7(0.875) − 15 f(0.875) = 3.06 - 6.125 - 15 f(0.875) = -18.065 vertex = (0.875, -18.065)

Step-by-step answer

P Answered by PhD

1

You have the intercepts and x-coordinate of the vertex correct. There appears to be a math error in the calculation of the y-value of the vertex.

f(7/8) = (4*7/8 -7)*(7/8) -15 = -49/16 -15 = -289/16 = -18.0625
Can someone confirm my work? f(x) = 4x2 − 7x − 15 part a finding x-intercepts: f(x) = 4x^2 − 7x −

Can someone confirm my work? f(x) = 4x2 − 7x − 15 part a finding x-intercepts: f(x) = 4x^2 − 7x −

Please someone work out x - 2/7 = 5

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