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3 years ago

Estimate the square root to the nearest internet 25

Mathematics

1 answer:

Yuki888 [10]3 years ago

6 0

Th square root of 25 is, 5

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Solve the system of equations {x−4y=3

Arte-miy333 [17]

Answer:

Step-by-step explanation:

$Substitution\ method:\\\\\left\{\begin{array}{ccc}x-4y=3&\text{add 4y to both sides}\\2x+y=-3\end{array}\right\\\\\left\{\begin{array}{ccc}x=4y+3\\2x+y=-3\end{array}\right\\\\\text{Substitute from the first equation to the second equation:}\\\\2(4y+3)+y=-3\qquad\text{use distributive property}\\\\(2)(4y)+(2)(3)+y=-3\\\\8y+6+y=-3\qquad\text{subtract 6 from both sides}\\\\9y=-9\qquad\text{divide both sides by 9}\\\\\boxed{y=-1}\\\\\text{Put the value of y to the first equation:}\\\\x=4(-1)+3\\\\x=-4+3\\\\\boxed{x=-1}\\\\\boxed{\boxed{x=-1,\ y=-1\to(-1,\ -1)}}$

$Elimination\ method:\\\\\left\{\begin{array}{ccc}x-4y=3\\2x+y=-3&\text{multiply both sides by 4}\end{array}\right\\\underline{+\left\{\begin{array}{ccc}x-4y=3\\8x+4y=-12\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\qquad9x=-9\qquad\text{divide both sides by 9}\\.\qquad\qquad\boxed{x=-1}\\\\\text{Put the value of x to the first equation:}\\\\-1-4y=3\qquad\text{add 1 to both sides}\\\\-4y=4\qquad\text{divide both sides by (-4)}\\\\\boxed{y=-1}\\\\\boxed{\boxed{x=-1,\ y=-1\to(-1,\ -1)}}$

5 0

2 years ago

Read 2 more answers

What is the value of x? 6x – 2 (x + 4) = 12<br><br>

Nadusha1986 [10]

let's solve for x :

$6x - 2(x + 4) = 12$

$6x - 2x - 8 = 12$

$4x = 12 + 8$

$x = \dfrac{20}{4}$

$x = 5$

hence value of x = 5

8 0

2 years ago

PLS HELP ME!

Phantasy [73]

Answer:

Step-by-step explanation:

just add

3.17

1.15

2.26

-------

7. 48 lbs

im pretty sure

4 0

3 years ago

Which of the following sets is NOT closed under addition.

Veronika [31]

Answer:

Step-by-step explanation:

The odd numbers.

Suppose you have 31 and 27 when you add these two together, you get 58 which is not an odd number.

If you need a more mathematical proof, you could do it this way.

2x+1

2x is even. Anything multiplied by 2 is even. When you add 1 you get an odd number

So continue on

2y + 1 is the other number.

2x + 1 + 2y + 1 = 2(x + y) + 2

2 (x + y ) is even. When you add 2 to it, nothing changes. The result is still even.

7 0

3 years ago

Linda collects a random sample of 12 of the 98 Wilderness Club members’ ages. She makes an inference that most wilderness club m

mash [69]

The box plot that would confirm the inference that Linda made would have a minimum value of 20 and a maximum value of 40. Somewhere in the between is the mean. The box plot should have a confidence interval of 95% in order to have the inference valid.<span />

7 0

2 years ago