Help me find the answer please

Mathematics

1 answer:

elena-s [515]3 years ago

5 0

Answer:

Step-by-step explanation:

m∠1=(55+65)/2=60

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The axis of symmetry for the graph of the function f(x)=3x2+bx+4 is x = 3. What is the value of b?

Kobotan [32]

Answer:

A)-18

Step-by-step explanation:

Given a quadratic equation of the form $y=ax^2+bx+c$ , the axis of symmetry is determined by the formula $x=-\frac{b}{2a}$ .

If the axis of symmetry of the equation: $f(x)=3x^2+bx+4$ is 3, then:

a=3, b=?, x=3

$x=-\frac{b}{2a}\\3=-\frac{b}{2*3}\\b=-6X3=-18$

The correct option is A.

7 0

4 years ago

Read 2 more answers

a plumber charges $50 for every house call and an additional $70 for each hour of work for one house call yesterday the plumber

sleet_krkn [62]

Answer:

5.5 hours

Step-by-step explanation:

Since every house has an initial charge of $50, we can begin with that

($50)

Then, let's define h as the number of hours. We know every hour is $70, although the hours is yet unknown so that can be

($70 * h) or simply ($70h)

Now, we know the total should end up to be $435, so after PEMDAS the equation will be

($70h + $50 = $435).

We subtract 50 from both sides so now we have $70h = $385.

Now we divide both sides by 70, giving us h = 5.5. Hope it helped!

4 0

3 years ago

Please help explanation if possible

stira [4]

Answer:

$y = 2x + 7$

Step-by-step explanation:

Use Point Slope Form since we are given the slope and coordinates. Why is the slope 2x?

 In Depth: Parallel lines never touch so they are Lines that have same slope but different y intercept. An example is a square. A square has four parallel sides. The upper and lower sides will never touch because they are the same slope and they both have a finite distance vertically between them.

Back to the question, let use the Point Slope Form,