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2 years ago

What App can I talk live to professors in chat ?

2 answers:

5 0

Zoom or google meet, there’s other educational websites that do that but it’s normally run through schools so if they didn’t offer you don’t have access

mart [117]2 years ago

3 0

Answer:

You can use Zoom or Google Meet. If that doesn't work, try Skype.

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10 > X - 3.<br> Help please

amm1812

Answer:

x<13

Step-by-step explanation:

1. Move variable [x] to left-hand side and change its sign

Move constant [10] to the right-hand side and change its sign

10>x-3

-x+10>-3-10

2. Calculate the difference [-3-10]

-x>-3-10

-x>-13

3. Change the signs [-x>-13] on both sides of the inequality and flip the inequality sign

x<13

4. Solution

x<13

8 0

3 years ago

Read 2 more answers

What is the factored form of this expression? 27m^3 +125n^3

ddd [48]

Answer:

$\left(3m+5n\right)\left(9m^2-15mn+25n^2\right)$

Step-by-step explanation:

$27m^3+125n^3=\left(3m\right)^3+\left(5n\right)^3$

Apply sum of cubes formula: $x^3+y^3=\left(x+y\right)\left(x^2-xy+y^2\right)$

$\left(3m\right)^3+\left(5n\right)^3=\left(3m+5n\right)\left(3^2m^2-3m\times 5n+5^2n^2\right)$

$\left(3m+5n\right)\left(9m^2-15mn+25n^2\right)$

5 0

2 years ago

Read 2 more answers

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