If x = -1/2 is a solution of the quadratic equation 3x2+2kx-3=0 find the value of k

Answers

Answer 1
Answer: just substitute for x :)

3(-1/2)2+2k(-1/2)-3=0
-3 + (-1k) -3 = 0 
-6 + (-1k) = 0 
+6            +6
-1k = 6 
/-1     /-1                    k = -6  that's what i believe the answer is 
 

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You pay $2.40 for 3434 pound of grapes. Your friend buys a pound of grapes at the same time and estimates that he will pay $1.80. What can you say about your friend's estimate?

Answers

If your friend was working from your figures, then his estimate was
waaaay off, like in outer space.

If you paid $2.40 for 3434 pounds, then that works out to something
like 0.007¢ for each pound.  His estimate of $1.80 is more than 2,500
times as much as you paid for each pound. 

Even allowing some slack for the quantity discount that you surely
must have been awarded for buying 1.7 tons of them all at once, still
that doesn't support his wild estimate in any way. 

He'd be better off buying a few pounds from you, at, say, 50¢ a pound. 
He needzum, you gottum, he'll gettum, and you'll  never missum.  That way,
you'll both make a killing, and it's a win-win-win all around.

Im having trouble with my homework can u tell me what is x=3y

Answers

That's an equation that describes a linear and proportional relationship between 'x' and 'y'. The graph of that equation is a straight line through the origin whose slope is. 1/3 .
y=3xx=3yIf you sub for y:x = 3*3x1 = 9
There's no solution possible other than x and y are zero.x = 3*3xx = 9x8x = 0x = 0y = 0If you graph these, you get 2 straight lines that intersect at the origin (0,0)

I believe you can zoom in... (Sorry if its too small! I tried to make it fit.) Due 2morrow!!! Please answer questions 1-6.

Answers

The picture is not clear enough to read the numbers,
but it IS clear enough to see what's actually going on.

This page is not six different problems.
It's the same problem six times.

The problem is: 
Find the area of a triangle, when you know
the height and the length of the base.

Here's the formula you need:

         Area of a triangle = (1/2) · (length of the base) · (height) .

For each triangle, the picture gives the length of the base and
the height.  All you have to do is write them into this formula, and
do the multiplication.

That's all the help you need.  Go get um !  You can do it.

What is 3 3/4 times 2 4/5 as a mixed number

Answers

210 would be the answer mutiply the botom of the fraction with the number and add the top of the fraction do that to both then add them together it would look like this
3times 4 +3=15 and 2 times 5+4=14  15 times 14= 210
10 1/2 is the answer.

Steps:
Change the fraction to improper fractions.
Multiply
Reduce
Change to proper fraction

Steps(Another Way):
Change the fraction to improper fractions.
Reduce by crossing it(5 and 15 reduced to 1 and 3; 4 and 14 reduced to 2 and 7.)
Change answer to proper fraction.

It took Lisa 2 hours to read the first 100 pages of a book. Then she read the last 44 pages in 1 hour. How many pages did she read per minute for the whole book?

Answers

1.25 pages per minute

A group of students ate 5/12 of a large pepperoni pizza and 8/10 of a large cheese pizza. Did they eat more pepperoni pizza or cheese pizza?

Answers

the ate more cheese pizza because 8/10 is greater than 5/12

Answer:

they ate more of the cheese pizza

Step-by-step explanation:

5/12<8/10