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love history [14]
4 years ago
15

Find three consecutive positive integers such that the square of the first increased by twice the second is three less than four

times the third.
Mathematics
1 answer:
Pepsi [2]4 years ago
5 0

Answer:

  3, 4, 5

Step-by-step explanation:

I like to let x represent the middle integer. Then the first is x-1 and the third is x+1. The given relation is ...

  (x-1)^2 +2x = 4(x+1) -3

We can put this equation into standard form and solve.

  x^2 -2x +1 +2x = 4x +4 -3

  x^2 -4x = 0 . . . . . subtract 4x+1

  x(x -4) = 0

So, x=0 is a solution to the equation, but an extraneous solution with respect to the problem.

x = 4 is also a solution to the equation, indicating the integers are 3, 4, 5.

_____

<em>Check</em>

3^2 +2·4 = 4·5 -3

17 = 17 . . . . answer checks OK

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Write a numerical expression that represents the quotient of 85 minus 7 and 19
disa [49]

Answer:

85-7-19 or 85-26

Step-by-step explanation:

4 0
3 years ago
Hey guys can any of you guys math geniuses help me out on this math question? 3 3/5 + 1/3=?
Katena32 [7]

Answer:

\dfrac{59}{15}=3 \frac{14}{15}

Step-by-step explanation:

Convert the mixed number into an improper fraction:

3 \frac35=\dfrac{3\times5+3}{5}=\dfrac{18}{5}

Now convert fractions so that their denominators are the same:

\implies \dfrac{18}{5}+\dfrac13=\dfrac{18\times3}{5\times3}+\dfrac{1 \times5}{3 \times 5}=\dfrac{54}{15}+\dfrac{5}{15}

As the denominators are now the same, we can simply add the numerators:

\implies \dfrac{54}{15}+\dfrac{5}{15}= \dfrac{54+5}{15}=\dfrac{59}{15}

Now convert back into a mixed number (if required):

\implies \dfrac{59}{15}=3 \frac{14}{15}

4 0
3 years ago
Read 2 more answers
Line segment C X is an altitude in triangle ABC. Triangle A B C is shown. Angle A C B is a right angle. An altitude is drawn fro
ira [324]

Answer:

i. ΔAXC ~ ΔCXB

ii. ΔBCX Is-congruent-to ΔACX

Step-by-step explanation:

From the given ΔABC, CX is the altitude of ΔABC; and also an angle bisector of <ACB.

So that:

m<AXC = m<BXC (right angle property)

m<ACX = m<BCX (congruent property)

m<ACX + m<AXC + m<CAX = 180^{o} (sum of angles in a triangle)

m<BCX + m<BXC + m<CBX = 180^{o} (sum of angles in a triangle)

Therefore, from the figure it can be deduced that;

i. ΔAXC ~ ΔCXB (Angle-Angle-Side, AAS, property)

ii. ΔBCX Is-congruent-to ΔACX (Angle-Angle-Side, AAS, property)

7 0
4 years ago
Read 2 more answers
Select the correct answer. <br>Given: ABC with DE||AC<br> Prove: AD/DB = CE/EB​
Nikitich [7]

Answer:

dc

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Plzzzz help with atleast 1question❤️
velikii [3]

Answer:

4) 3, -2, -8

5) -7

6) E

7) D

8) 5, -1, 34

Step-by-step explanation:

4) There are at least two prominent points on line EF: (0, -4) and (6, 5). From there, we can find the slope-intercept formula of it.

The slope: (5 + 4) / (6 - 0) = 9 / 6 = 3 / 2

The intercept: (0, -4)

So, we have y = 3/2x - 4.

-3/2x + y + 4 = 0

Multiply every term by 2.

-3x + 2y + 8 = 0.

But the question asks for A to be >0! Multiply everything by -1.

3x - 2y - 8 = 0

So, the values of A, B, and C, respectively, are 3, -2, -8.

5) There are at least two prominent points on line GH: (-9, 4) and (-1, 2). From there, we have...

The slope: (4 - 2) / (-9 + 1) = 2 / -8 = -1/4

y = -1/4x + b

2 = (-1/4 * -1) + b

2 = (1/4) + b

b = 1.75; or 1 and 3/4; or 7/4.

Then, we have our intercept: 7/4.

We have an equation in slope-intercept form: y = -1/4x + 7/4

1/4x + y - 7/4 = 0

Multiply everything by 4.

x + 4y - 7 = 0.

The value of C is -7.

6) Lines that are parallel to the y-axis are vertical lines, which means that the x-values never change. We are looking for an equation where x = 3. That is code letter E.

7) Lines perpendicular to the y-axis are horizontal lines, which means that the y-values never change. We are looking for an equation where y = -5. That is code letter D (y + 5 = 0; y = -5).

8) A line parallel to 5x - 8y + 12 = 0 would have the same slope as it.

5x - 8y + 12 = 0

-8y = -5x - 12

y = 5/8x + 3/2

So, the line should have a slope of 5/8.

3 = (5/8) * (-2) + b

3 = -10/8 + b

3 = -5/4 + b

b = 3 + 5/4

b = 4 and 1/4; 17/4.

y = 5/8x + 17/4

-5/8x + y - 17/4 = 0

Multiply all terms by 8.

-5x + y - 34 = 0

Multiply all terms by -1.

5x - y + 34 = 0.

The values of A, B, and C, respectively, are 5, -1, 34.

I REALLY hope this helps because my brain kinda hurts now XD Have a great day!

3 0
3 years ago
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