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3 years ago

Help anyone I don’t understand this ????

Mathematics

1 answer:

Alexeev081 [22]3 years ago

5 0

The answer would be 0
You combine the first 2 “K” and that would make it k squared meaning it equals to 1 so now it’s 3k minus 3k so 0

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Which equation is equivalent to startroot x^2 + 81 EndRoot = x + 10?

Nitella [24]

Answer:given below

Step-by-step explanation:

sqrt x^2 +81= x + 10

x^2 + 81 = (x+10)^2

x^2 + 81 = x^2 + 20x + 100

so answer is:

x^2 + 81 = x^2 +20x + 100

..HOPE IT HELPS YOU...ALL THE BEST

3 0

3 years ago

Please Helpppp!!!! A man has 10 more dimes than quarters. he has $2.75 how many of each coin does he have?

liberstina [14]

Answer: 3.75

Step-by-step explanation:

Ten dimes make a dollar.One dime can be written 10¢ or $0.10.

he has $2.75+1.00=375

4 0

3 years ago

Uhh help lol<br> 5.3x + y = 28.5 <br> 4.2x + 3.1y = 27.2<br> find x and y

navik [9.2K]

Answer:

x = 5, y = 2

Step-by-step explanation:

First, isolate y in the top equation.

$y = -5.3x+28.5$

Next, substitute y in the bottom equation.

$4.2x + 3.1(-5.3x + 28.5) = 27.2$

$5.3x + y = 28.5$

Simplify.

$4.2x + -16.43x + 88.35 = 27.2$

Combine like terms.

$-12.23x + 88.35 = 27.2$

Isolate x on one side.

$-12.23x = -61.15$

Isolate x.

$x = 5$

Substitute x into $5.3x + y = 28.5$

$5.3(5) + y = 28.5$

Simplify.

$26.5 + y = 28.5$

Isolate y.

$y = 2$

$x = 5 \\y = 2$

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3 years ago

Solve x2 – 3x - 108 = 0.

rewona [7]

X=12, -9 I hope this somewhat helps you :)

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3 years ago

Coordinate Plane Dilation

andrew11 [14]

Answer:

B. (36, -12)

Step-by-step explanation:

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3 years ago