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3 years ago

1 What word phrase can you use to represent the algebraic expression? 2x + 7

Mathematics

1 answer:

navik [9.2K]3 years ago

6 0

Answer:

two mulplied by x plus seven

Step-by-step explanation:

2x is 2 mulplied by x and then + 7 is plus seven put it all together and you get 2 mulplied by x plus seven

does that

make sense?

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If the point (-6, 10) lies on the graph of y=f(x) then which of the following points must lie on the graph of y=1/2f(x)?

MAXImum [283]

Answer:

(-6,5)

Step-by-step explanation:

we have

y=f(x) ----> the parent function

y=1/2f(x) ---> the new y-value will be 1/2 times the original value

The rule of the transformation of f(x) to 1/2f(x) is

(x,y) -----> (x,y/2)

substitute the given value

(-6,10) ------> (-6,10/2)

(-6,10) ------> (-6,5)

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2 years ago

What is the quadratic regression equation for the data set? <br><br> PLEASEE HELP ME

Soloha48 [4]

You're trying to find constants $a_0,a_1,a_2$ such that $\hat y=a_0+a_1\hat x+a_2{\hat x}^2$ . Equivalently, you're looking for the least-square solution to the following matrix equation.

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

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

$\mathbf{Ax}=\mathbf b\implies\mathbf A^\top\mathbf{Ax}=\mathbf A^\top\mathbf b\implies\mathbf x=(\mathbf A^\top\mathbf A)^{-1}\mathbf A^\top\mathbf b$

Computing this, you'd find that

$\mathbf x=\begin{bmatrix}a_0\\a_1\\a_2\end{bmatrix}\approx\begin{bmatrix}121.119\\-3.786\\-0.175\end{bmatrix}$

which means the first choice is correct.

8 0

3 years ago

The graph below shows the cost that Hondo pays for apples. What does the point (0,0) on this graph mean?

timurjin [86]

Answer:

(0,0) means that he didn't buy any apples so it doesn't cost anything

Step-by-step explanation:

3 0

2 years ago

due 7:59 am est. Faith is saving up to buy a new bicycle. She already has $40 and can save an additional $6 per week using money

expeople1 [14]

Answer:

After 8 weeks, Faith would have $88. money saved = 40+6w

7 0

2 years ago

Read 2 more answers

A cereal box is 12cm tall. The area of the base is 7cm. What is the volume?

andrey2020 [161]

Answer:

588cm3

Step-by-step explanation:

Since the base is 7cm, and it is a cereal box, that means the depth is also 7cm.

Hence,

7x12x7=588

7 0

2 years ago