3 years ago

Brian ate 1/5 of a pie. The colin ate 1/5 of the pie, and david ate 1/5 of the pie.

Mathematics

1 answer:

sleet_krkn [62]3 years ago

5 0

Answer:

2/5

Step-by-step explanation:

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45+ 46+47+ 48+ ... 113 + 114Gauss approach

Doss [256]

Answer:

$5565$

Step-by-step explanation:

$1+2+3+4...+113+114=\frac{114*115}{2} =6555$

$1+2+3+4 ... +43+44=\frac{44*45}{2} =990$

Thus, $45+46+47+48...+113+114=$ $6555-990=5565$

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3 years ago

You have been reflecting about your relationship with math. How can thinking about yourself as a learner help you become a bette

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It allows students to see the importance of their own learning process. Process Recognition: Students can identify what they did well, what they failed at, what they need to change.

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2 years ago

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Domain:<br> Range:<br> Increasing:<br> Decreasing:

mihalych1998 [28]

Answer:

Domain- -2>x<2

Range- [4,∞)

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Decreasing-[4,∞]

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3 years ago

5c + 3 -2c + 5 simplify the expression

snow_lady [41]

5c + 3 - 2c + 5

5c - 2c + 3 + 5

3c + 8 ~~~

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3 years ago

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A is a 4x4 matrix and A^2 + 4A - 5I = 0. If det(A+2I)>0, enter det(A+2I)

maw [93]

$\mathbf A^2+4\mathbf A-5\mathbf I=0$
$\implies\mathbf A^2+4\mathbf A+4\mathbf I=(\mathbf A+2\mathbf I)^2=9\mathbf I$
$\implies\det\bigg((\mathbf A+2\mathbf I)^2\bigg)=\det(9\mathbf I)$
$\implies\det(\mathbf A+2\mathbf I)^2=9^4\det\mathbf I$
$\implies\det(\mathbf A+2\mathbf I)=\pm\sqrt{9^4}$
$\implies\det(\mathbf A+2\mathbf I)=9^2=81$

where we take the positive root because we're told that the determinant is positive.

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3 years ago