All categories

3 years ago

X+y= -9 x+2y= -25 According to the system of equations above, what is the value of y?

Mathematics

1 answer:

Varvara68 [4.7K]3 years ago

6 0

Try this option:
if x+y=-9 is I (one)
and x+2y=-25 is II (two), then
if II-I, then (x+2y)-(x+y)=-25+9 ⇔ y=-16.

You might be interested in

The cost of pumpkin seeds is proportional to

zheka24 [161]

Answer:

Part 1) The unit rate is $\$0.25\ per\ ounce$

Part 2) A 56 ounce bag of pumpkin Seeds cost $14.00

Step-by-step explanation:

Part 1) What is the unit rate for the pumpkin seeds?

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

Let

y ----> the cost of pumpkin seeds in dollars

x ---> the weight in ounces

we have

For x=24 ounces, y=$6

Find the value of the constant of proportionality k

$k=\frac{y}{x}$

substitute the values

$k=\frac{6}{24}=\$0.25\ per\ ounce$

The unit rate is the same that the constant of proportionality k

therefore

The unit rate is

$\$0.25\ per\ ounce$

Part 2) How much would 56. ounce bag of pumpkin seeds cost?

we know that

The linear equation is equal to

$y=0.25x$

For x=56 ounces

substitute in the linear equation and solve for y

$y=0.25(56)=\$14.00$

6 0

3 years ago

08.01) Which of the following statements shows a characteristic of a statistical question? (4 points) Select one: a. The questio

Alexeev081 [22]

Answer:

the distribution can be broken into categories

7 0

2 years ago

Read 2 more answers

Which word phrase represents this expression?<br><br> 2n + 3

djverab [1.8K]

three more than twice a number.

8 0

2 years ago

Read 2 more answers

The equation y = 5x represents the amount of miles Fran runs in x days. When a graph of this situation is drawn, what does the p

GuDViN [60]

so y=5x on a graph is going to look like a 5/1 slope. X represents days and Y represents miles. So (1,5) means in 1 day Fran runs 5 miles.

4 0

3 years ago

Read 2 more answers

Aiden and gia went to a clothing store where all the items had a 7% sales tax added to their cost. before the tax was added aide

pshichka [43]

Answer:

a. $34.24

b. $33

Step-by-step explanation:

Hope this helps

5 0

2 years ago

Read 2 more answers