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2 years ago

Jonathan needed to get his computer fixed. He took it to the repair store. The

Mathematics

1 answer:

kykrilka [37]2 years ago

8 0

Answer:

$141 + 3x = 336$

$3x = 195$

$x = 65$

So the cost of labor is $65 per hour.

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At the grocery store, an 8-inch cherry pie costs $4.39 and a similar 10-inch cherry pie cost $6.15. which is the better deal?

ValentinkaMS [17]

For the 8 inch pie you are paying about 55 cents per inch
for the 10 inch pie you are paying about 61 cents per inch
so the 8 inch pie is a better deal

hope this helped
oh and to get those numbers divide 4.39 by 8 and 6.15 by 10

5 0

3 years ago

What is 2a +16 what does that =

kirill115 [55]

A will equal 8. can i get a brainliest plz

7 0

3 years ago

In an isosceles triangle, one angle is 75° greater than each of the other two equal angles. Find the measure of all three angl

mote1985 [20]

It's 35, 35, and 110

8 0

3 years ago

The slope of the line

Fantom [35]

Answer: -2

Explanation: On the image we can see it goes down 4 units and right 2. Giving us the slope $\frac{-4}{2}$

Simplified that is -2 which is the slope of the line

6 0

3 years ago

Graph f(x) =-2x^+16x-30 by factoring to find the solutions, then find the coordinates of the vertex, and the axis of symmetry. I

fredd [130]

Answer:

Observe attached image

Function zeros:

(3, 0), (5, 0)

Vertex:

(4, 2)

Axis of symmetry:

 $x =4$ 

Step-by-step explanation:

First factorize the function

$f (x) = -2x ^ 2 + 16x-30$

Take -2 as a common factor.

$-2(x ^ 2 -8x +15)$

Now factor the expression $x ^ 2 -8x +15$

You must find two numbers that when you add them, obtain the result -8 and multiplying those numbers results in 15.

These numbers are -5 and -3

Then we can factor the expression in the following way:

$f (x) = -2(x-5)(x-3)$

The quadratic function cuts the x-axis at x = 3 and at x = 5.

Now we find the coordinates of the vertex.

For a function of the form $ax ^ 2 + bx + c$ the x coordinate of its vertex is:

$x = \frac{-b}{2a}$

In the function $f (x) = -2x ^ 2 + 16x-30$

$a = -2\\b = 16\\c = 30$

Then the vertice is:

$x = \frac{-16}{2(-2)}\\\\x = 4$

The y coordinate of the symmetry axis is

$y = f (4) = -2 (4) ^ 2 +16 (4) -30\\\\y = 2$

The axis of symmetry is a vertical line that cuts the parabola in two equal halves. This axis of symmetry always passes through the vertex.

Then the axis of symmetry is the line

$x = 4$

The solutions and the vertice written as ordered pairs are:

Function zeros:

(3, 0), (5, 0)

Vertex:

(4, 2)

6 0

3 years ago