3 years ago

Are these correct? {number 13 on front is 10}

Mathematics

2 answers:

Romashka [77]3 years ago

6 0

Yes, these are correct

enyata [817]3 years ago

5 0

Yep it is correct!!!

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In a certain Algebra 2 class of 29 students, 18 of them play basketball and 7 of them play baseball. There are 2 students who pl

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Answer:

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Step-by-step explanation:

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4 years ago

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Diego is solving the equation x^2-12x = 21

uysha [10]

Answer:

The solutions to the quadratic equations will be:

$x=\sqrt{57}+6,\:x=-\sqrt{57}+6$

Step-by-step explanation:

Given the expression

$x^2-12x\:=\:21$

Let us solve the equation by completing the square

$x^2-12x\:=\:21$

Add (-6)² to both sides

$x^2-12x+\left(-6\right)^2=21+\left(-6\right)^2$

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$x^2-12x+\left(-6\right)^2=57$

Apply perfect square formula: (a-b)² = a²-2ab+b²

i.e.

$x^2-12x+\left(-6\right)^2=\left(x-6\right)^2$

so the expression becomes

$\left(x-6\right)^2=57$

$\mathrm{For\:}f^2\left(x\right)=a\mathrm{\:the\:solutions\:are\:}f\left(x\right)=\sqrt{a},\:-\sqrt{a}$

solve

$x-6=\sqrt{57}$

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$x-6+6=\sqrt{57}+6$

Simplify

$x=\sqrt{57}+6$

also solving

$x-6=-\sqrt{57}$

add 6 to both sides

$x-6+6=-\sqrt{57}+6$

Simplify

$x=-\sqrt{57}+6$

Therefore, the solutions to the quadratic equation will be:

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3 years ago

Rewrite the expression using the distributive property and collecting like terms

Bumek [7]

12x would be the answer

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3 years ago

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Step-by-step explanation:

1. Ratio : 2:3

2. Multiply the number of juniors by the Ratio

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3. Solve for answer

Answer: 14

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4 years ago

Please help me, sorry if it’s blurry.

slamgirl [31]

Answer:

decagon is 36° 20-gon is 18°

Step-by-step explanation:

divide de number of sides by 360

N/360

10/360= 36

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3 years ago

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