Solve the following system of equations using the elimination method

5x+3y=1
x+2y=3​

Answer: x=4 and y=3

Step-by-step explanation:

We start eliminating the same numbers with the same variable. So we take out 5y on both equation. We then subract 3x to 6x and we do the same to the right side. We end up having 3x=12 and then we divide 12/3=4. We plug 4 on the x values in one of the equation to find out the y value on that equation. You end up with y=3 and then plug that in the same equation on both to see if its right. Finally after that its correct.

Answer:

3.33 repeating or 3 and 1/3

Step-by-step explanation:

If you divide 10 by 3 you get a repeating decimal of 3.3333...

or if you make the fraction into a mixed number, it would be 3 and 1/3

9514 1404 393

Answer:

  see below

Step-by-step explanation:

The applicable properties of exponents are ...

  (a^b)^c = a^(bc)

  (a^b)(a^c) = a^(b+c)

  (a^b)/(a^c) = a^(b-c)

__

  [tex](-2^2)^{-6}\div(2^{-5})^{-4}=2^{-12}\div2^{20}=2^{-12-20}=\boxed{2^{-32}}\\\\2^4\cdot(2^2)^{-2}=2^{4+2(-2)}=2^0=\boxed{1}\\\\(2^2)^2\cdot (2^3)^{-3}=2^{2(2)+3(-3)}=2^{4-9}= \boxed{2^{-5}}\\\\(-2^{-4})^{-2}\cdot(2^2)^0=2^{(-4)(-2)}\cdot 1= \boxed{2^8}[/tex]

__

Please note that ...

  [tex](-2^2)^{-6}=\dfrac{1}{(-4)^6}=\dfrac{1}{4096}=2^{-12}[/tex]

That is, since the outside exponent is even, the sign is immaterial. This is also true for the other expression containing -2. The result is positive.

hey someone else has already answered this!

a. To find the least squares regression equation for a group of (x,y) points:

Step 1: For each point(x,y), we need to calculate x² and xy first.

Step 2: Sum all x, y, x² and xy, which gives us Σx, Σy, Σx² and Σxy

Step 3: Calculate Slope m: m = (NΣxy − Σx Σy)/ N(Σx²) − (Σx)² , here N is the number of data.

Step 4: Calculate Intercept b: b = Σy − m(Σx)/ N

Step 5: Assemble the equation as y= mx+b

Here, we have ∑x = 120, ∑y= 1379, ∑x²= 919.5, ∑xy= 10466 and N= 16

So, m= (NΣxy − Σx Σy)/ N(Σx²) − (Σx)²

=

=

=  

= 6.33

and b = Σy − m(Σx)/ N

=

=

=

= 38.71

So, the least squares regression equation is : y= mx+b ⇒ y= 6.33x +38.71

b. When x= 8, then y= (6.33×8)+38.71 = 50.64 + 38.71 =89.35

The approximate test score of a student who sleeps an average of 8 h a night is 89.35%

EVERYTHING IS FROM sicista on brainly!

Answer:

A way to write the least regression equation that models is data y = mx + b => y= 6.33x + 38.71 and as for problem B when X = 8 then y = (6.33 x 8) + 38.71 = 50.64 = 38.71 = 89.35 so the estimated test score of a student who sleeps eight hours a night is equal to 89.39%

Step-by-step explanation:

Answer:

C.

f(x) = 0.34 + 0.21(x – 1); $.97

Step-by-step explanation:

In 2002, the price of mailing a letter was $.34 for the first ounce and $.21 for each ounce after the first ounce. Write a rule to describe the function.

---------------------------------------

Price = 0.34 + 0.21(x-1) where x is the weight of the item in ounces.

Let +x+ = weight of the letter in ounces

Let +P+ = the price of mailing the letter in dollars

---------------------------------------

+P+=+.34+%2B+.21%2A%28+x+-+1+%29+

( +x+%3E=+1+ )

-----------------------------

A 4-ounce letter costs

+P+=+.34+%2B++%28+4+-+1+%29%2A.21+

+P+=+.34+%2B+.63+

+P+=+.97+

It costs $.97

Answer: P(7)=P(5)=12

Step-by-step explanation:

The probability of choosing milk and not milk will be 0.5833 and 0.4167, respectively.

Its fundamental concept is that someone will nearly surely occur. The proportion of positive events in comparison to the total of occurrences.

Then the probability is given as,

P = (Favorable event) / (Total event)

A sack contains 7 milk and 5 dim chocolates. A sweet is chosen indiscriminately.

The total number of the sweets will be given as,

Total events = 7 + 5 = 12

The probability of choosing milk will be given as,

P = (7/12)

P = 0.5833

The probability of choosing not to milk will be given as,

P = (5/12)

P = 0.4167

The probability of choosing milk and not milk will be 0.5833 and 0.4167, respectively.

More about the probability link is given below.

https://brainly.com/question/795909

#SPJ5

Answer:

6 i think.

Hope this helps!

Answer:

xy = 2.35

Step-by-step explanation:

Answer:

-3/4

Step-by-step explanation:

(y2 - y1) / (x2 - x1) is the equation for finding slope! All you have to do is plug in the numbers! Hope this helps :)

Work:

5-2/-4-0

3/-4

Introduction to Solving Systems of Equations Theresa and Cary are saving for a printer. Theresa has $10 in the bank and will save $20 each month. Cary has $25 in the bank and will save $15 each month. 1. How much does Theresa have at month #0710 2. How much does Cary have at month #obA 3. Fill in the table for several months. Then graph the data. Use a different color for each girl's table values and graph. Label and scale the axes appropriately Theresa Ca Total Total Month # | Month # | savings in $ (x) savings in $ 0 0 2 2 5 6 6 S 7 4. Write an equation that represents Theresa's savings. yoxtl 5. Write is an equation that represents Cary's savings. tS Which girl is saving at a faster rate? Justify your answer by referring to the 6. table, the graphs, and the equations. 7. At which months does Theresa have more money? 8. At which months does Cary have more money? 9. At which month do they have the same amount of money? What do you notice about the graphs at this month? Introduction to Solving Systems of Equations con... Two friends, Malcolm and Zeke, are going to the park that is near their school. They leave at the same time from different locations. Malcolm is 30 meters from the school on his way to the park, and he is walking at the rate of 1 meter per second. Zeke is at school and will jog to the park at a rate of 4 meters

Answer:

28

Step-by-step explanation:

Answer:

240.75

Step-by-step explanation:

i might be wrong l mao

Answer:

27+ 40 ÷ 2^3

27+40/8

27+5

32

Answer:

eight hundred seventy five thousand five hundred eighty four

Step-by-step explanation:

Answer:

5/8 + 7/12

Step-by-step explanation:

Miles to friends house = 5/8

Ditance to the movies = 7 1/2

To find the total distance walked in Wal, we sun the fraction of distance Evans walked to his friend's house and the distance walked from friend's house to the movies ;

That is :

5/8 + 7/12

= 29/24 miles

Answer: 7x - 5

Step-by-step explanation:

The expression given in the question is:

= 6x - 5 + x

We have to collect like terms. This will be:

= 6x + x - 5

= 7x - 5

Answer:

26x+5

Step-by-step explanation:

Answer:

still no work shown man

Step-by-step explanation:

i cant help you if you do not give us any images or type the problem in

Answer:

For 17 the first answer is 1(1/20). The picture can be misleading because the flags are at the same height and the American flag's pole looks shorter. This is only because it is behind the Floridian flag and because the perspective isn't accurate to compare them.

Step-by-step explanation:

The mixed fraction would be 1(5/100) which can be simplified when you divide the fraction by 5 into 1(1/20).

Answer: I d k

Step-by-step explanation:

Answer:

25

explanation:

just because

Answer:

1283/1000

Step-by-step explanation:

or 2/14

Answer

7/12

Step-by-step explanation:

Answer:

The answer is A

Step-by-step explanation:

I got it right

Answer:

Answer choice A is correct.

Step-by-step explanation:

I'm smort UwU

Answer:

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Answer:

As BVC is similar to RJC

from BV/RJ=BC/RC=Y/8=13.5/9=108/9=12

Y=12

Answer:

-15.58

Step-by-step explanation:

Answer:

-15.58

Step-by-step explanation:

Multiply the traditional way

-8.2

x1.9

-------

738

820

----------

15.58

But because you're multiplying a positive and a negative, the answer will be negative leaving you with (-15.58)

Answer:

well basically no so i say no

Step-by-step explanation:

you can but you wouldn't get a answer because you would only get the same answer so..

Answer:

When we try to divide by zero, things stop making sense

Step-by-step explanation:

Answer:

a

Step-by-step explanation:

Answer:

i. 1/4

ii. 54/125

iii. 1107/5000000

iv. 1/50

Step-by-step explanation:

i.

25% = 0.25

0.25 = 25/100

25/100 (GCF 25) = 1/4

ii.

43.2% = 0.432

0.432 = 432/1000

432/1000 (GCF 8) = 54/125

iii.

0.02214% = 0.0002214

0.0002214 = 2214/10000000

2214/10000000 (GCF 2) = 1157/5000000

iv.

2% = 0.02

0.02 = 2/100

2/100 (GCF 2) = 1/50

Answer:

:4.5 hoursStep-by-step explanation:225 divided by 50 = 4.5

Answer:

its 4 hours and 30 minutes

Step-by-step explanation:

if 50 is equvalemt to 1 hour then 225 divide by 50 then the answer was 4.5 and the 4.5 is equal to 4 hours and 30 minutes

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