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3 years ago

Solve the first equation in the system for y. 2x + y = 1 3x + 2y = 0

Mathematics

2 answers:

DaniilM [7]3 years ago

8 0

Answer:

2x + y= 4

3x + 2y=7

Step-by-step explanation:

x + y =2 2+2=4

x+y=2 3+2=5 5+2=7

sergey [27]3 years ago

5 0

Where is the number that will be fill X or Y to solve this equation

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Eight less than seven times a number is six find the number

Leokris [45]

Answer:

Step-by-step explanation:

let the number be n , then

7n - 8 = 6 ( add 8 to both sides )

7n = 14 ( divide both sides by 7 )

n = 2

The number is 2

4 0

3 years ago

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Gala2k [10]

The first choice is correct

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3 years ago

This skateboard ramp has two ladders. On ladder is 40 feet high and the other is 24 feet high. The distance from the top of the

Verizon [17]

Okay, so we know that the distance from the high ladder to the bottom is 200 feet... if you take 200/40 its 5 now take 24*5 and the answer should be 120

8 0

3 years ago

1 pound of ground beef feeds 8 people. How much ground beef will you need for 5 people? Write an equation

DIA [1.3K]

Answer: 0.625 pound

Explanation:

1 pound = 8 people,

y pound = 5 people

Cross multiply to get

1 x 5 = 8y

5 = 8y

y = 5/8 = 0.625 pounds

Step-by-step explanation:

4 0

3 years ago

Jason and Jill or two students in mr. White's math class. On the last 5 quizzes Jason scored an 80 90 95 85 and 70. Jill scored

Mrac [35]

Jason's scores : 80 90 95 85 70 and

Jill's score : 70 75 90 100 95.

Mean of Jason's scores = $\frac{80 + 90 + 95 + 85 + 70}{5}=\frac{420}{5}=84.$

Mean of Jill's scores = $\frac{70+75+90+100+95}{5}=\frac{430}{5}=86$

Now, in order to find the mean absolute deviation, need to find the difference of each score from means.

<u>Mean absolute deviation for Jason's scores.</u>

|84-80| = 4

|84-90| = 6

|84-95| = 9

|84-85| = 1

|84-70|= 14

$\frac{4+6+9+1+14}{5}=\frac{34}{5}=6.8$

<u>Mean absolute deviation for Jill's scores</u>

|86-70| = 16

|86-75| = 11

|86-90| = 4

|86-100| = 14

|86-95|= 9

$\frac{16+11+4+14+9}{5}=\frac{54}{5}=10.8$

Jill got average quiz score 86 and Jason got 84.

Therefore, Jill got better quiz average.

Also, the mean absolute deviation for Jason scores is less that is 6.8 than 10.8.

Therefore, Jason got more consistent grades.

8 0

4 years ago