All categories

3 years ago

PLEASE PLEASE HELP!!!GIVING BRAINLEIST!! RESPOND IN 5 MIN FOR POINTS!!❤️

Mathematics

1 answer:

Mamont248 [21]3 years ago

8 0

Step-by-step explanation:

The error carolyn has made is that she hasn't subtracted properly.

2x + 3y - (2x +6y) = 2x - 2x + 3y - 6y = -3y.

Carolyn probably didn't use parentheses...

To do the thing in substitution, we single out x or y in any equation. In this case, i'm gonna single out the x in the 2nd eqn. In other words, i'll make x the subject of the 2nd eqn.

2x + 6y = 10

2x = 10 - 6y

x = 5 - 3y

Now we simply plug in 5 - 3y wherever x apperas in the 1st equation.

2 (5-3y) + 3y = 8

10 - 6y + 3y = 8

10 - 3y = 8

-3y = -2

y = 2/3

Then x = 5 - 3*2/3 = 3

x=3

y=2/3

Hope it helps:)

You might be interested in

Multiply.

Elis [28]

Hey there!

$Answer:\boxed{\text{C.}108.73608}$

$Explanation:$

$31.246*3.48$

Multiply to solve.

$\boxed{\text{C.}108.73608}\text{ is your answer.}$

Hope this helps!

$\text{-TestedHyperr}$

4 0

3 years ago

If w is a string of english letters a–z (all uppercase for the purposes of this problem), let wr denote the reverse of w; (train

Dennis_Churaev [7]

Answer:

$f(x)=\left \{\begin{array}{rl}26^{\frac{k}{2}}&\text{for k even}\\26^{\frac{k+1}{2}}&\text{for k odd}\end{array}\right.$

Step-by-step explanation:

Half the length of the palindrome can be any possible sequence of the 26 available letters. The other half is constrained to be the reverse of the same sequence. For odd length sequences, the middle letter can be any of the 26.

So, for k even, the number of palindromes is 26^(k/2). For k odd, the number is 26·26^((k-1)/2) = 26^)((k+1)/2).

5 0

3 years ago

HELP DUE IN 15 MINS!

Stells [14]

Answer:

n = 18

Step-by-step explanation:

<u>Sum of interior angles of a polygon:</u>

(n - 2)180 = 160n
180n - 360 = 160n
20n = 360
n = 18

8 0

3 years ago

Solve for x and y: x+y=5 x−y=a

9966 [12]

Answer:

x=5/2 + a/2, y= 5/2 - a/2

Step-by-step explanation:

We can solve this system using addition of the equations

x+y=5

2x =(5+a)

x=(5+a)/2= 5/2 +a/2

x=5/2 +a/2

x-y=a

y = x - a , x=5/2 + a/2

y= 5/2 + a/2-a

y= 5/2 - a/2

5 0

3 years ago

A car travels 9 miles in 7 minutes. How fast is it going in miles per hour? How fast is it going in meters per second?

Tems11 [23]

Answer:

he's going 77mph and then 2069 meters per hour.

8 0

1 year ago