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3 years ago

Multiply (3x)(x^2+4x-15)

Mathematics

1 answer:

antiseptic1488 [7]3 years ago

3 0

Use the picture below to see how I did it and got the answer

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In an expression (8/9) squared (-81)+3/5dividedby-9/10

Nitella [24]

If you wanted to calculate it, there it is:
$(\frac{8}{9})^2 (-81)+\frac{\frac{3}{5}}{\frac{-9}{10}} = \frac{64}{81}*(-81)+\frac{3}{5}*\frac{10}{-9} = -64+\frac{-2}{3}= \\ =-64-\frac{2}{3}=\frac{-192-2}{3}=\frac{-194}{3}$

6 0

3 years ago

Read 2 more answers

Can someone help me with this question????

frutty [35]

Answer:

Hi! I think I got the answer, it is a tricky one! The answer I got was C) 1029.

Step-by-step explanation:

1. It is good to first know that 40%more means 1.4 (some number). So, if n is 40% more than the sum of the other three numbers: n= 1.4* (l +m+p) .

2. Also note that: n+l+m+p= 1764; so, n = 1764-l-m-p.

3. Since we have two expressions for n, we can equate them to each other. Giving, 1.4* (l +m+p) =1764-l-m-p . Simplifying we get 2.4 (l +m+p)=1764.

4. l +m+p =1764/2=735.

5. 1764-735=1029

Hope that helps! Feel free to message back if there are any questions!

7 0

3 years ago

Which one doesn't belong? A.3:4 B.4:3 C.chicken nuggets B.dots

maxonik [38]

Answer:

Step-by-step explanation:

3:4

4:3

and the dots are 4:3

6 0

3 years ago

Sandra has taken 3 Test this Quarter. She has scored an 78%, 76%, and a 93%. Sandra wants to earn at least and 85% for the Quart

algol [13]

Answer:

I think at least a 86% hope this helps, hope i am right

Step-by-step explanation:

5 0

3 years ago

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A line contains the points (-3, 4) and (7, -1). Calculate the equation of the line in the form

ad-work [718]

Answer:

$y=-\frac{1}{2}x+\frac{5}{2}$

Step-by-step explanation:

First we need to find the slope of the line. We can plug in both coordinates in to the slope formula.

The slope formula is:

$m=\frac{y2-y1}{x2-x1}$

So I will use (-3,4) as the first coordinate, and (7,-1) as the second coordinate.

x₁ = -3

y₁ = 4

x₂ = 7

y₂= -1

I will plug in these values to find the slope.

$m=\frac{y2-y1}{x2-x1}\\\\m=\frac{-1-4}{7-(-3)}\\\\m=\frac{-5}{10}\\\\m=-\frac{1}{2}$

Now that we know the slope is -1/2, we can plug in the slope and a point into the point slope equation. Then we can solve for y.

$y-y_{1} =m(x-x_{1} )\\\\y-4==-\frac{1}{2}(x-(-3))\\\\y-4=-\frac{1}{2}x-\frac{3}{2}\\\\ y=-\frac{1}{2}x+\frac{5}{2}$

I have attached an image of what this graph should look like. Since the slope is -1/2, the y value should decrease by 1/2 every time you move over by 1 on the x axis. And since the equation says "+5/2" we know we have to shift the graph up by 5/2. The y-intercept will be 5/2.

I added another image that shows how to graph an equation using the equation y=mx+b

5 0

4 years ago