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34kurt
3 years ago
12

How many solutions does this system have? y=5x-1 y=-3+7

Mathematics
1 answer:
Ksenya-84 [330]3 years ago
8 0
I'll assume that's

y=5x-1

y=-3x + 7

Please let me know if that's wrong.

These are two lines in point slope form.   They'll meet at some x that makes the ys equal.


5x-1 = -3x + 7

5x + 3x =1+ 7

8x= 8

x= 1
 
y=5x-1 = 5(1)-1 = 4

(x,y)=(1,4) is the only solution.

Exactly one solution.

We really only had to ensure the lines had two different slopes.  Then there's always exactly one solution.

If the lines had the same slope, they're either the same line (coincident) so an infinite number of solutions, all the points on that line, or they're parallel, no solutions.


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Andrea, Dina, and Lindsay invested in a partnership in the ratio of 7:9:14, respectively.
Scrat [10]

The new ratio of ownership once the business was owned by only Andrea and Lindsay is 8 : 7

<h3>a. How much did Andrea pay Dina for her share of the partnership? </h3>

The ratio is given as:

Andrea : Dina : Lindsay = 7 : 9 : 14

The partnership worth is given as

Worth = $1,800,000

The amount received by Dina is:

Dina = Dina Ratio/Total Ratio * Worth

So, we have

Dina = 9/(7 + 9 + 14) * 1800000

Evaluate

Dina = 540000

Hence, Andrea pays Dina $540,000 for her share of the partnership

<h3>What percent of the business did Andrea own after she bought out Dina? </h3>

Initially, we have:

Andrea : Dina : Lindsay = 7 : 9 : 14

So, the new ratio is

Andrea : Lindsay = (7 + 9) : 14

Evaluate

Andrea : Lindsay = 16 : 14

As a percentage, we have

Andrea = 16/(16 + 14) * 100%

This gives

Andrea = 53.33%

Hence, Andrea owns 53.33% of the business after she bought out Dina

<h3>What was the new ratio of ownership once the business was owned by only Andrea and Lindsay?</h3>

In (b), we have:

Andrea : Lindsay = 16 : 14

Simplify

Andrea : Lindsay = 8 : 7

Hence, the new ratio of ownership once the business was owned by only Andrea and Lindsay is 8 : 7

Read more about ratio at:

brainly.com/question/2784798

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7 0
1 year ago
Below is the frequency distribution of the weights (in kg) of some sample of teen-agers.
Elan Coil [88]
Omg i can not even read the hol thing it is too much
5 0
3 years ago
Fourth-eight is what percent of 60
dsp73
48 is 80% of 60

48 of 60 can be written as 48/60

Multiply both the numerator and the denominator by 100
48/60 · 100/100 = 80/100 = .8 = 80%

If you are using a calculator, simply enter 48 ÷ 60 · 100 which will give you 80 as the answer. 




6 0
3 years ago
Read 2 more answers
Use synthetic division to find (5x<br> + 31x + 32) = (x + 5).
LiRa [457]
We move all terms to the left:
+31x+32)-((+5)=0
So your answer is 0
5 0
3 years ago
How much weight did he gain over the six week period?
kolezko [41]
Convert all to decimals
1/4=0.25
1/2=0.5 so

2 and 1/2=2.5
3=3
-1 and 1/4=-1.25
4 and 1/4=4.25
1 and 1/4=1.25
-1 and 1/2=-1.5
add all together
2.5+3-1.25+4.25+1.25-1.5=8.25=8 and 1/4


answer is 8 and 1/4
B is correct answer
(note, previous user's answer was correct, but had no work shown)
3 0
3 years ago
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