3 years ago

-2x+y=12 3x+2y=38 You have to use substitution to solve this problem

Mathematics

1 answer:

tatiyna3 years ago

5 0

{-2x+y=12 => y=12+2x

{3x+2y=38

3x+2(12+2x)=38

3x+24+4x=38 /-24

7x=14 /:7

x=2

y=12+2*2=12+4=16

y=16

<em>Solution: (2; 16)</em>

You might be interested in

What is the slope of the line that passes through the points (8,8) and

aliya0001 [1]

Answer:

$\frac{5}{6}$

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

A total of

Arte-miy333 [17]

Let x equal the number of adult tickets sold.

X + 3X=512
(I put 3x because we know the students sold 3 times as many).
Solve for X.

X+3X=512
4X=512
4X/4=512/4
X=128

3 0

3 years ago

Si en 11 cajas de chocolates hay 220 chocolates en total. Calcula cuántos chocolates habrá en total en 5 cajas de chocolates.

pochemuha

Answer:

Habrá 100 chocolates en total en 5 cajas de chocolates.

Step-by-step explanation:

Esta pregunta es resolvida usando proporciones, con lo uso de regla de tres .

11 cajas, 220 chocolates:

Entonces:

$\frac{220}{11} = 20$

20 chocolates por caja.

Calcula cuántos chocolates habrá en total en 5 cajas de chocolates.

20 chocolates por caja, entonces:

5*20 = 100

Habrá 100 chocolates en total en 5 cajas de chocolates.

6 0

2 years ago

Margaret is going to make some triangular picture frames. She will use strips of wood that are 7 inches, 8 inches, and 6 inches

artcher [175]

In a triangle, the side opposite the largest angle is the longest one. So the answer is 8 inches.

3 0

3 years ago

Read 2 more answers

What is the percent error of 7cm

antoniya [11.8K]

The answer is 7.14%

Your ruler measuring centimeters has lines for each centimeter. The rule for error is anything between 6.5 and 7.5 is considered 7cm. So the degree of error is plus or minus .5cm.
Your aim is 7cm so you divide your error of .5 by your target measurement. .5/7= 7.14 percent.

8 0

3 years ago