All categories

2 years ago

Systems of equation substitution 2x+4y=24 x=4y

Mathematics

1 answer:

antoniya [11.8K]2 years ago

5 0

Answer:

(x, y) = (8, 2)

Step-by-step explanation:

substitute x = 4y into the other equation

2(4y) + 4y = 24

8y + 4y = 24

12y = 24 ( divide both sides by 12 )

y = 2

substitute y = 2 into x = 4y

x = 4 × 2 = 8

solution is (8, 2 )

You might be interested in

If f(x)=-2x^2+5x-3 and g(x) is the reflection of f(x) across the y-axis, then an equation of g is which of the following

Ymorist [56]

To reflect a function across the y-axis you have to change

$x\mapsto -x$

So, the function becomes

$f(x)=-2x^2+5x-3 \mapsto f(-x)=-2(-x)^2+5(-x)-3=-2x^2-5-3$

3 0

3 years ago

Whats the unit rate of $112 in 8hours

jeyben [28]

To find the unit rate, we just divide.

$\sf112\div8=14$

So the unit rate is 1 hour = $14.

4 0

2 years ago

3. You have 3 consecutive numbers, with the smallest number n.

lbvjy [14]

Heyo !!

☕️ $\bold{Jace~ is~ here~ to~ help~ !}$

$\frac{A~n~s~w~e~r~ :}{}$

<h2>A. What are the 7 numbers in the term of n?</h2>

——————————

———————————

EXPLANATION :

Because when you have 3 consecutive numbers, you have to put 7 numbers in the term of the n.

Hope It Helped!

<u>And Tell me if The answer is wrong. . .</u>

<h3><u>Good Luck With Your Assignment!</u></h3><h3 />

#LearnWithBrainly

$\underline{A ~n~s~w~e~r~:}$

﹋﹋﹋﹋﹋﹋﹋

Jace ^-^

7 0

2 years ago

A man has 12 different colored shirts and 20 different ties in his closet. How many shirts and tie combinations can he select to

GuDViN [60]

15 because one tie goes to each t shirt and 5-1 is 5 then you do it two more time’s because there are three shirts

7 0

2 years ago

What is the determinant ? <br>ANS : -2 <br>plz help me with process

WITCHER [35]

Answer:

(-2)

Step-by-step explanation:

We have to find the determinant of the given matrix,

$A=\begin{bmatrix}(a-1) & (a^2-a+1)\\ (a+1) & (a^2+a+1)\end{bmatrix}$

det A = (a - 1)(a² + a + 1) - (a + 1)(a² - a + 1)

= a(a² + a + 1) - 1(a²+ a + 1) - a(a² - a + 1) - 1(a² - a + 1)

= a³ + a² + a - a² - a - 1 - a³ + a² - a - a² + a - 1

= (a³ - a³) + (-a² + a² - a² - a²) - 1 - 1

= -2

Therefore, determinant of the given matrix is (-2).

6 0

2 years ago