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Yuki888 [10]
3 years ago
9

HELP! (5 + x)(5 - x) = 7 is a quadratic equation. true or false

Mathematics
2 answers:
arlik [135]3 years ago
5 0
True, this equation is a quadratic equation,.
nataly862011 [7]3 years ago
3 0

TRUE

This is a quadratic equation.

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Identify the similar triangles them find the x
Alex Ar [27]

Answer:

ADB and ABC are similar

x = 8

Step-by-step explanation:

hypotenuse in ADB = \sqrt{4^2 + 2^2 } = \sqrt{20}

since two triangles are similar,

\frac{2+x}{\sqrt{20} } = \frac{\sqrt{20}}{2}

solving for x, x=8

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3 years ago
While Flinn was starting the fire, his friends were collecting firewood. Flinn has 5 sticks. If he puts 3 sticks in the fire eve
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If $5000 is invested at 7.8% interest compounded monthly, how much would you have after 54 months?
Nuetrik [128]

5000 x (1+0.078/12)^54

5000 x (1.0065)^54

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3 years ago
Joel is twice as old as Kayla in 5 years the sum of their ages will be 55 years what are the ages of two people
stealth61 [152]
Kayla is 15 while joel is 30
7 0
3 years ago
Read 2 more answers
SOMEONE PLEASE HELLPPPP
ipn [44]

Answer:

93.39

Step-by-step explanation:

So the sum of exterior angles of the convex octagon is: 360 degrees

This means if we add all the equations that represent each angle, we can set it equal to 360 and solve for x

(x+14) + (2x-3) + (3x+8) + (3x+16) + (2x-17) + (3x-4) + (3x-12) + (6x)

Group like terms

(x+2x+3x+3x+2x+3x+3x+6x) + (14-3+8+16-17-4-12)

Add like terms

23x+2

Now let's set the sum of exterior angles to 360

23x+2 = 360

Subtract 2 from both sides

23x=358

Divide both sides by 23

x\approx 15.565

So by looking at all these, it appears that 6x is the highest value, given that x is positive. The way I estimated, is approximately 15.5, whenever I saw an equation like x+14, I estimated it's about 2x, since 14 is not exactly, but close to 15.5. I did this with each polynomial given. You could also manually check each one

Original equation

6x

Subsitute

6(15.565)

Simplify

93.39

7 0
1 year ago
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