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avanturin [10]
3 years ago
11

2x² – xy - 15y2 How to factor by grouping

Mathematics
1 answer:
dsp733 years ago
6 0

Answer:

(2x + 5y) (x - 3y)

Step-by-step explanation:

Hope this helps!

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​Yesterday, Jack drove 33 and one half
borishaifa [10]

change each mixed number to an improper fraction

33 1/2 = (2*33 +1)/2 67/2

1 1/4 = (4*1+1)/4 = 5/4

67/2 divided by 5/4

copy dot flip

67/2 * 4/5

268/10

26 8/10

26 4/5 miles per gallon

3 0
3 years ago
Read 2 more answers
A person invests $2,740 in an account that earns 4.3% annual interest. Find when the value of the investment reaches $7,000. If
Juli2301 [7.4K]

So, to set up your equation is the hardest part. If you remember the basic format, you're set.

I(t) = P * (1+r%)^t

t= time and this will be our variable

Initial amount P = $2740

Rate = 4.3% which converts numerically into .043

I(t) = 7000

Before we get to find out how to find how many years it takes to get to $7000, set up the basic equation by plugging in what we know.


I(t) = $2740(1+4.3%)^t

I(t)=2740(1.043)^t

Now plug in for $7000 for I(t)

7000=2740(1.043)^t                 Divide both sides by 2740

7000/2740 = 2740/2740(1.043)^t

2.55474453=(1.043)^t

Now you can solve for t in two ways. You can either use the natural log or graph it on your graphing calculate and see when the two equations meet.

In your calculator you can set up:

ln(2.55474453)/ln(1.043) = t                 which is the method I prefer since it's much simpler

t=22.278528

but you can also graph it in your ti-84

with

y1=2.55474453

y2=(1.043)^x

and find where they intersect on the graph.

either way it'll be the same answer

3 0
3 years ago
Y=(1/2)^x +2. What is the horizontal asymptote of this function?
professor190 [17]
\lim_{x\to -\infty} \left(\frac{1}{2}\right)^x+2=\infty+2=\infty\\
\lim_{x\to \infty} \left(\frac{1}{2}\right)^x+2=0+2=2\\

There is one-sided horizontal asymptote y=2
6 0
4 years ago
The sum of two numbers is 65. The smaller number is 11 less than the larger number. What are the numbers?
Irina-Kira [14]
Sum means u add the two numbers together

38 + 27 = 65
7 0
3 years ago
3, 5, 6, 1, 3, 11,7
stiv31 [10]

Answer:

range= 10

median= 5

mode= 3

Variance= 11 (rounded) normal answer without rounding 10.809524

Midrange= 6

3 0
3 years ago
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