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3 years ago

A board is 7 feet 9 inches long. How long is it in inches?

Mathematics

2 answers:

il63 [147K]3 years ago

8 0

93 inches. This is because 7 feet is 84 inches because 7*12 is 84, plus the extra nine inches is 93 inches.

Anika [276]3 years ago

6 0

93 inches - 7 times 12 (inches in a foot)is 84 plus 9 is 93 inches.

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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:

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

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

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

5 0

3 years ago

What is the sum of x?

Korolek [52]

Answer:

the answer is 40

Step-by-step explanation:

x+60

x=60-20

x=20

3 0

3 years ago

Read 2 more answers

How many parallel lines does a square have?

Anestetic [448]

A square has two pairs of parrallel lines :) I hope it helps :)

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3 years ago

In the expression, x^2 + 6x + 9, which is the coeffcient?

ikadub [295]

The coefficient is the number next to the letter.

Although the x squared term has a coefficient of 1, it is not listed in the answer choices. However, the coefficient of the middle term 6x is listed.

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2 years ago

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Vladimir [108]

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