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3 years ago

Which expression has a coefficient of positive 1 for the the term n?

Mathematics

1 answer:

yanalaym [24]3 years ago

4 0

Answer:

3n^2+n-2

Step-by-step explanation:

Coefficient is the number that we multiply an expression that contains a variable. In all the expressions above the variable is n.

Some examples:

Coefficient of n^2 is 1.

Coefficient of n in n^2+2n+1 is 2.

Solution:

In 5n^2+6n-1 the Coefficient of n is 6.

In 2n^2+5n+1 the Coefficient of n is 5.

In 40^2 - n +9 the Coefficient of n is - 1.

In 3n^2 +n - 2 the Coefficient of n is POSITIVE 1.

We tend to not write 1*n because 1*n=n.

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Solve with a system of equations: Two angles are supplementary if the sum of their measures are 180 degrees. If one is 90 degree

julsineya [31]

Answer:

The measures of the angles are 150° and 30°.

Step-by-step explanation:

Let x and y represent the measures of the angles, with x representing the larger angle.

x + y = 180 . . . . . . the two angles are supplementary

x = 90 + 2y . . . . . one is 90° more than twice the other

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Substituting the expression given by the second equation into the first, we have ...

(90 +2y) +y = 180

3y = 90 . . . . . . . . . . collect terms, subtract 90

y = 30 . . . . . . . . . . . divide by the coefficient of y

x = 180 -y = 150

The measures of the angles are 150° and 30°.

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4 years ago

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Rama09 [41]

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3 years ago

What is "a" if B= is a singular matrix | 2 2 a

Inessa05 [86]

Answer:

The value of a=4

Step-by-step explanation:

Given the matrix

$B=\begin{pmatrix}1\:&\:2\:\\ \:\:\:2\:&\:a\end{pmatrix}$

A matrix is singular if its determinent is zero.

so solving the matrix B by taking its determinant to get the value a

$\det \begin{pmatrix}1&2\\ 2&a\end{pmatrix}=0$

as according to determinant formula

$\det \begin{pmatrix}a\:&\:b\:\\ c\:&\:d\:\end{pmatrix}\:=\:ad-bc$

$1\cdot \:a-2\cdot \:2=0$

$a-4=0$

$a=4$

Therefore, the value of a=4

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3 years ago

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Hunter-Best [27]

Answer:

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Step-by-step explanation:

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