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hichkok12 [17]
3 years ago
13

Which ordered pairs in the form (x, y) are solutions to the equation

Mathematics
2 answers:
const2013 [10]3 years ago
8 0
Remember that a solution to an equation is a coordinate pair that makes a true statement.

So, for each of these coordinate pairs, plug in the x coordinate for the x in your equation and the y coordinate for the y in your equation.

Example:
5x + 3y = 8;
which of these is a solution? 
(1,1)
(-3, 2)

For each coordinate pair provided, I'm going to plug it back into my original equation:

SO: for (1,1)
5x + 3y = 8
5(1) + 3(1) = 8
5 + 3 = 8
8 = 8 <--- This is a true statement. (1,1) IS a solution to this equation.

For (-3,2)
5x + 3y = 8
5(-3) + 3(2) = 8
-15 + 6 = 8
-9 = 8 <---- This is NOT a true statement. (-3,2) is not a solution to this equation.

You have to do the same thing!! Plug each of your answer choices into your original equation. Solve it out. If you end up with a TRUE statement, the coordinate pair IS a solution. If you end up with a FALSE statement, the coordinate pair is NOT a solution!

sergeinik [125]3 years ago
4 0

(6,0)

(-9,-12)

(1,-4)

are all correct.

(4,8) is wrong.

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I need help plzzzz percent equations blank% of $30 =3
Lyrx [107]

Answer:

10%

Step-by-step explanation:

Hello I can help you with this question. Lets start.

The question is asking what percent of $30 is 3

so i think u actually meant $3 right but anyways

30 is 10 times 3

then clearly it would be 10%

gogo that's the answer!

4 0
2 years ago
What percent of 2b is: 0.04b; 0.2b; 0.56b; 1.8b; 2.5b; 3b; By what percent are they each larger or smaller than 2b?
Marina86 [1]

Answer:

1. 0.04b. <u>0.04b is 2% of 2b. It is smaller than 2b by 98%.</u>

2. 0.2b. <u>0.2b is 10% of 2b. It is smaller than 2b by 90%.</u>

3. 0.56b. <u>0.56b is 28% of 2b. It is smaller than 2b by 72%.</u>

<u>4. </u>1.8b. <u>1.8b is 90% of 2b. It is smaller than 2b by 10%.</u>

<u>5. </u>2.5b. <u>2.5b is 125% of 2b. It is larger than 2b by 25%.</u>

<u>6. 3b. 3b is 150% of 2b. It is larger than 2b by 50%.</u>

Step-by-step explanation:

1. 0.04b

<u>For all the cases, we will use Rule of Three, this way.</u>

Percentage * 2 = 100 * 0.04

Percentage = (100 * 0.04)/2 (Dividing by 2 at both sides)

Percentage = 4/2 = 2%

<u>0.04b is 2% of 2b. It is 98% smaller than 2b.</u>

<u>For all cases, we will use (100 - x) for calculating how smaller or larger the expression is related to 2b, where x is the percentage of the expression itself). In this case, 100 - 2 = 98.</u>

2. 0.2b

Again, we will use Rule of Three, this way:

Percentage * 2 = 100 * 0.2

Percentage = (100 * 0.2)/2 (Dividing by 2 at both sides)

Percentage = 20/2 = 10%

<u>0.2b is 10% of 2b. It is 90% smaller than 2b.</u>

3. 0.56b

Again, we will use Rule of Three, this way:

Percentage * 2 = 100 * 0.56

Percentage = (100 * 0.56)/2 (Dividing by 2 at both sides)

Percentage = 56/2 = 28%

<u>0.56b is 28% of 2b. It is 72% smaller than 2b.</u>

<u>4. </u>1.8b

Again, we will use Rule of Three, this way:

Percentage * 2 = 100 * 1.8

Percentage = (100 * 1.8)/2 (Dividing by 2 at both sides)

Percentage = 180/2 = 90%

<u>1.8b is 90% of 2b. It is 10% smaller than 2b.</u>

5. 2.5b

Again, we will use Rule of Three, this way:

Percentage * 2 = 100 * 2.5

Percentage = (100 * 2.5)/2 (Dividing by 2 at both sides)

Percentage = 250/2 = 125%

<u>2.5b is 125% of 2b. It is 25% larger than 2b.</u>

<u>In this case, 100 - 125 = -25. It means the second expression is larger than 2b by 25%.</u>

<u>6. </u>3b.

Again, we will use Rule of Three, this way:

Percentage * 2 = 100 * 3

Percentage = (100 * 3)/2 (Dividing by 2 at both sides)

Percentage = 300/2 = 150%

<u>3b is 150% of 2b. It is 50% larger than 2b.</u>

<u>In this case, 100 - 150 = -505. It means the second expression is larger than 2b by 50%.</u>

6 0
3 years ago
Ray cuts out a figure that has 4 equal sides and no right angles. What is the best name for the figure ?
Karolina [17]
C. Rhombus

Because it has 8 sides
7 0
2 years ago
-4x + 7 = 2y- 3<br> y-intercept:<br> X-intercept:
Nat2105 [25]
X intercept: (3,0)
y intercept: (0,-3/2)
6 0
3 years ago
Read 2 more answers
The probability that will rain tomorrow 0.85. what is the probability that will not rain tomorrow?
Maslowich

Answer:

probability that will not rain tomorrow

P(nR) = 1-0.85

= 0.15

is the answer

3 0
3 years ago
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