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Inga [223]
4 years ago
7

2x + 3y =10x + y = 3 please do workings asap

Mathematics
2 answers:
valina [46]4 years ago
6 0
.....hope this help and you can read my handwriting

kompoz [17]4 years ago
5 0
This is system of Equations. 
<span>2x + 3y =10
x + y = 3 
</span>
x + y = 3 (multiply this by three) to get 3x + 3y = 9
2x + 3y =10
3x + 3y = 9 Subtract them

-1x = 1 
x=-1 
Now plug x back into the top equation and solve for y. 

I hope this helps! If not, let me know! Have a fantastical day!
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From a group of 8 people 5 will each win $1000.How many different winning groups are possible?
ra1l [238]

Answer:

6720 ways different

Step-by-step explanation:

In this case, we must calculate the different ways using the permutation formula:

nPr = n! / (n - r)!

where n is the total number of people and r would come being the group of person that you want to put together the groups, therefore n = 8 and r = 5

replacing:

8P5 = 8! / (8 - 5)!

8P5 = 6720

That is to say that there are 6720 ways different winning groups are possible

4 0
3 years ago
Write the slope intercept form of the equation for the line. A.Y=8/5x-1/2, B.Y=-5/8x+1/2, C.Y=5/8x+1/2. D. Y=8/5x+1/2
Andrei [34K]

Answer:

Step-by-step explanation:

Slope-intercept form is y-y_{1}=m(x-x_{1}  ) where m is the slope

A. The slope is 8/5, and the -1/2 means that the point (0, -1/2) falls on the line, therefore the slope-intercept form is y+1/2=8/5(x-0) or y+1/2=8/5x

B. The slope is -5/8, and the 1/2 means that the point (0, 1/2) falls on the line, therefore the slope-intercept form is y-1/2=-5/8(x-0) or y+1/2=-5/8x

C. The slope is 5/8, and the 1/2 means that the point (0, 1/2) falls on the line, therefore the slope-intercept form is y-1/2=5/8(x-0) or y-1/2=5/8x

D. The slope is 8/5, and the 1/2 means that the point (0, 1/2) falls on the line, therefore the slope-intercept form is y-1/2=8/5(x-0) or y-1/2=8/5x

7 0
4 years ago
Tthere are 5 people already in the pool.jonas and his 2 friends get in.how many people are in the pool ​
ExtremeBDS [4]
8 people because there are 5 people plus Jonas(1) plus his 2 friends so 5+1+2=8
5 0
3 years ago
How much chromium-51 will be left after 7 months?
Makovka662 [10]

Answer:

It seems there's more information in you question that you haven't posted.

7 months = 7 * (365/12) = 213 days

The half-life of chromium 51 is 27.7 days.

After 7 months, chromium 51 will have undergone 7.69 half-lives.

To solve for the ending amount we'll use the formula:

Ending Amount = Beginning Amount / 2^n where 'n' = # of half-lives

We'll say the beginning amount =1

Ending Amount = 1 / 2^7.69

Ending Amount = 0.0048426082

Basicaly if you started with 1 gram of chromium 51, after 7 months you would have 0.0048426082 grams.

Source: https://www.1728.org/halflife.htm

Step-by-step explanation:

6 0
3 years ago
Using diagonals from a common vertex, how many triangles could be formed from
IrinaK [193]
I am pretty sure it’s 4
8 0
2 years ago
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