MATHEMATICS MIDDLE SCHOOL

9x + 7y = -12 find the value of y when x equals 1

Answers

Answer 1

Answer:

Answer:

y = -3

Step-by-step explanation:

9x + 7y = -12

Let x = 1

9 (1) + 7y = -12

9 + 7y = -12

Subtract 9 from each side

9 -9 + 7y = -12-9

7y = -21

Divide each side by 7

7y/7 = -21/7

y = -3

Answer 2

Answer:

Answer:

y = -3

Step-by-step explanation:

9x + 7y = -12

9(1) + 7y = -12

9 + 7y = -12

7y = -12 - 9

7y = -21 (divide both sides by 7)

y = -3

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Least to greatest
6/7 3/10 2/4

Answers

Answer:

3/10, 2/4, 6/7

Step-by-step explanation:

lets convert into decimals.

6/7=0.85714285714

3/10=0.3

2/4=0.5

Now lets sort them.

3/10 (0.3), 2/4 (0.5), 6/7 (0.85714285714)

Hope this helps!

from least to greatest is 3/10,6/7,and 2/4

I hope this helps

If Julie needs 3 1/4 cups of oat meal how many 1/4 cups of oatmeal will she use ?

Answers

Basically, you divide 3 1/4 by 1/4. To do that, you have to change the mixed number into an improper fraction. 3 1/4 as an improper fraction is 13/4. I was able to find that since you simply just multiply the denominator by the whole number, 4 x 3, which is 12, then add 12 to the numerator, 1, which is 13. Finally, the improper fraction is 13/4 (the denominator stays the same). Now, we can divide the fractions. One rule about fractions: dividing them is the same as multiplying them with the reciprocal of the other. Like say for example, the reciprocal of 1/5 is 5/1.

Let's solve:

13/4 divided by 1/4 =
13/4 x 4/1 = At this point, you just multiply them straight across.
52/4 = It's not simplified since both can still be divided. So, you simplify by finding the greatest common multiple of 52 and 4, which is 4. 52 divided by 4 = 13; 4 divided by 4 = 1.
52/4 = 13/1 = 13 (any numerator with the denominator of one is a whole number when simplified)

So if Julie needs 3 1/4 cups of oatmeal, she will use 13 of 1/4 cups of oatmeal. Answer's 13. :) I really hope I helped!

15 r minus 6 r = 36

Answers

Answer:

R= 4

So that means

15(4)-6(4)=36

The (4) in parenthesis means multiply.

8 meters decreased by 25 percent

Answers

8 meters decreased by 25 percent would be 8-.25(8) = 8-2=6 meters

The endpoints of a line segment are at the coordinates (–6, 3, 4) and (4, –1, 2). What is the midpoint of the segment?a
(–1, 1, 3)

b
(–2, 2, 6)

c
(–10, –2, 2)

d
(–5, –1, 1)