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3 years ago

6

I am thinking of a number x. what algebraic expression represents 7 less than three times this number?

1 answer:

sammy [17]3 years ago

8 0

Step-by-step explanation:

Answer: 3x-7

Explanation: x times 3

(3x)

subtracted by 7

(3x-7)

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Find the number of possible choices for a 3-digit PIN (personal identification number) if the digits CAN be repeated.

Lelechka [254]

10*10*10 = 1000 possible choices

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3 years ago

The bill in a restaurant is $102.25. A tip of 20% is added to the bill. What id tyhe final amount paid?

motikmotik

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Step-by-step explanation:

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3 years ago

Determine the quadratic function f whose graph is given. The vertex is (1,-3) and y-intercept is -2

Nesterboy [21]

Answer:

Vertex form: $f(x)=(x-1)^2-3$

Standard form: $f(x)=x^2-2x-2$

Step-by-step explanation:

A quadratic function in vertex form is $f(x)=a(x-h)^2+k$ where $(h,k)$ is the vertex.

We are given $h=1,k=-3$ .

Let's plug that in:

$f(x)=a(x-1)^2-3$ .

Now let's find $a$ .

We will use the $y$ -intercept $(0,-2)$ to find $a$ .

$f(0)=a(0-1)^2-3$

$-2=a(0-1)^2-3$

$-2=a(-1)^2-3$

$-2=a(1)-3$

$-2=a-3$

$1=a$

So the function in vertex form is:

$f(x)=(x-1)^2-3$ .

In standard form, we will have to multiply and combine any like terms.

Let's do that:

$f(x)=(x-1)(x-1)-3$

$f(x)=x^2-x-x+1-3$

$f(x)=x^2-2x-2$

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3 years ago

Johns family has $12 to spend after buying tickets to the Aquarium. Parking costs $3 an hour.

TEA [102]

Answer:

4 hours

Step-by-step explanation:

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2 years ago

(3-1) + (1 - 2) =<br> what is the answer to this question? i don’t understand it.

Ganezh [65]

Answer:

1

Step-by-step explanation:

$(3 - 1) + (1 - 2)$

Order of operations is () ^ * / + -

$2 + ( - 1)$

$2 - 1$

$1$

6 0

3 years ago

Read 2 more answers