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3 years ago

Does anyone know 20=b/3 is in a one step equation

Mathematics

2 answers:

oee [108]3 years ago

6 0

Answer: b = 60

Step-by-step explanation:

Multiply by 3 on both sides to find b.

20(3) = b/3(3)

b = 60

inna [77]3 years ago

4 0

Answer:

b=60

Step-by-step explanation:

All you have to do in this equation is multiply both sides by 20 as we want to have the variable b on one side by itself. Doing this we get 60=b.

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$\underbrace{\begin{bmatrix}1&6&6^2\\1&3&3^2\\\vdots&\vdots&\vdots\\1&9&9^2\end{bmatrix}}_{\mathbf A}\underbrace{\begin{bmatrix}a_0\\a_1\\a_2\end{bmatrix}}_{\mathbf x}=\underbrace{\begin{bmatrix}100\\110\\\vdots\\70\end{bmatrix}}_{\mathbf b}$

To solve $\mathbf{Ax}=\mathbf b$ , multiply both sides by the transpose of $\mathbf A$ , which introduces an invertible square matrix on the LHS.

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Computing this, you'd find that

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