3 years ago

Solve the equation for all values of x by completing the square. x2 + 21 = 10x

Mathematics

1 answer:

sashaice [31]3 years ago

3 0

Answer:

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Step-by-step explanation:

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-6x+4y=10<br> X-5y=-21<br> Please solve !

galina1969 [7]

X-5y=-21
x=-21+5y

-6(-21+5y)+4y=10
126+-30y+4y=10
126+-26y=10
-26y=-116
y=4.4615
x=1.3076

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3 years ago

A school replaced 20% of it computers with new ones . what the total number of computers in the school if 55 computers were repl

sladkih [1.3K]

The total is 275 because 100% divided by 20% is 5 and if 20%= 55 then that means that 55 goes into 100% 5 times so you multiply 55 by 5 to get 275. Hope I helped! Please rate me as the brainliest!

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4 years ago

Yael earns a straight commission as a real estate agent. Last month his total sales were $971,168.00. If Yael earns a 3% rate of

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Yael’s gross income was $29,140

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3 years ago

V2 - 15 = -2v Solve the Quadratic. What are the 2 solutions?

ki77a [65]

Answer:

v=-5 and v=3

Step-by-step explanation:

We are given that

$v^2-15=-2v$

We have to find two solutions of quadratic equation.

$v^2+2v-15=0$

Using addition property of equality

$v^2+5v-3v-15=0$ (By using factorization method)

$v(v+5)-3(v+5)=0$

$(v+5)(v-3)=0$

Substitute each factor equal to 0

$v+5=0$ and $v-3=0$

$v=-5$ and $v=3$

Hence, two solutions of quadratic equation are

v=-5 and v=3

8 0

3 years ago

Someone please help me. ASAP

frosja888 [35]

Answer:

x=2

Step-by-step explanation:

4x+6=x+12

-x -x

3x+6=12

-6 -6

3x=6

/3 /3

x=2

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3 years ago

Read 2 more answers