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3 years ago

I need help with math homework

Mathematics

1 answer:

Akimi4 [234]3 years ago

6 0

Answer:

x is going to be 38 and have a great day

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The function f(x) = –x2 + 20x – 75 models the profit from one customer, in dollars, a shop makes for printing photos, where x is

trasher [3.6K]

The function is graphed as shown below

Part A:

We use the formula $- \frac{b}{2a}$ to find the vertex of the function. A quadratic function of the form of $a x^{2} +bx+c$ and equating this form to the given function $- x^{2} +20x-75$ , we have
$b=20$ and $a=-1$ .

Substituting $a$ and $b$ into the vertex formula, we have
$x=- \frac{20}{2(-1)}=10$ , as shown in the graph

This calculation means that the highest profit is achieved when the number of photo printed equals to ten photos

Part B:

We can find solution to this equation by factorising

$- x^{2} +20x-75=0$
$-( x^{2} -20x+75)=0$
$x^{2} -20x+75=0$
$(x-5)(x-15)=0$
$x=5$ and $x=15$ , as shown in the graph

The two values means that the company makes no profit when they either produce 5 or 15 photos

8 0

4 years ago

Who weighed more at the beginning of the show? *

Jobisdone [24]

Answer:

We need more information to answer this question, I'd gladly help if there was some more data.

Step-by-step explanation:

8 0

4 years ago

Read 2 more answers

A woman saw oranges and mangos ad the market. She bought some oranges at 35 cents each and some mangoes at $1.00. if she bought

marysya [2.9K]

Answer: 20 oranges and 5 mangoes

Step-by-step explanation:

Define the following:

x = number of oranges

y = number of mangoes

Make the following system of equations:

x + y = 25

0.35x + 1.00y = 12.00

Solve for x:

y = 25 - x

⇒ 0.35x + 1.00(25 - x) = 12.00

⇒ 0.35x + 25 - x = 12.00

⇒ -0.65x = -13.00

⇒ x = 20

Solve for y:

20 + y = 25

y = 5

∴ 20 oranges and 5 mangoes were purchased.

8 0

2 years ago

Find the area of a parallelogram with bass 15 yards and height 21 2/3yards

r-ruslan [8.4K]

Convert the mixed number 21 2/3 into an improper fraction.
15⋅65/3

Cancel 3 and 15.
5⋅65

Multiply 5 by 65 to get 325.
325

Answer:
325

4 0

3 years ago

Can someone help me and explain on paper , I’m still so confused

Oksanka [162]

Answer:

Your answer is -5

Step-by-step explanation:

On paper;

8 0

3 years ago