[ 2x + y = -9 ] x -3
[- 3x +11= y ] x 2

-6x -3y = 27
-6x + 22 = 2y

-6x +27 = 3y
-6x +22 = 2y

5 = y

-6x -3x5 = 27
-6x -15 = 27
-6x = 42
-x = 42/6
-x = 7
x = -7

answer

x = -7
y = 5

8 0

3 years ago

A group of robins took 78 days to fly 3000 miles. On average about how many miles did the robins flight each day? Explain why yo

Irina-Kira [14]

Answer:

$34.48\text{ miles}$

Step-by-step explanation:

GIVEN: A group of robins took $78$ days to fly $3000$ miles.

TO FIND: On average about how many miles did the robins flight each day.

SOLUTION:

Total number of days taken by robins to fly the distance $=78$

Total distance traveled by robins $=3000\text{ miles}$

Now,

Average miles robins flights each day $=\frac{\text{total miles traveled by robin}}{\text{total days taken}}$

$=\frac{3000}{78}$

$=34.48$

Hence robin flight average $34.48$ miles each day.

3 0

4 years ago

Find p. 60 р 30 10 Write your answer in simplest radical form. units

klasskru [66]

Answer:

12345678

Step-by-step explanation:

gtrhtgkyikguko

8 0

3 years ago

A random sample of students were surveyed as to how much non-school screen time

GaryK [48]

The percentage of students who spend less than 4 hours a week on screens which reported a grade average below 80 is 50%

Given, we have the report representing children spending time online, on social media or watching T.V, which has there effect on there grades as above or below 80.

By the question we know that the number of students who spends less than 4 hours a week on screen is:

9 + 9

= 18

And among the 18 students there are 9 students whose grade average is below 80.

So the percentage of the students who spends 4 hours a week on screen is:

= 9 ÷ 18 × 100%

= 100/2

= 50%

hence 50% students spend less than 4 hours a week on screens.

Learn more about Percentage here:

brainly.com/question/843074

#SPJ1

3 0

1 year ago