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Aleksandr-060686 [28]
3 years ago
9

20 POINTS

Mathematics
2 answers:
aivan3 [116]3 years ago
7 0

Answer:

To figure out if an ordered pair is a solution to an equation, you could perform a test. Identify the x-value in the ordered pair and plug it into the equation. When you simplify, if the y-value you get is the same as the y-value in the ordered pair, then that ordered pair is indeed a solution to the equation.

Step-by-step explanation:

saveliy_v [14]3 years ago
6 0

Answer:

No

No

Yes

Yes

Step-by-step explanation:

8x + 2(-4x - 5) = -10

8x - 8x - 10 = -10

-10 = -10

Infinite solutions

-3 = -4(-2) - 5

-3 = 3 (false)

1 = -4(6) - 5

1 = -29 (false)

-5 = -4(0) - 5

-5 = -5 (true)

15 = -4(-5) - 5

15 = 15 (true)

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What is 3/x+2 = 4/x+1<br> So what is 'x'
spin [16.1K]
\frac{3}{x+2} =  \frac{4}{x+1} \\ \\ 3(x + 1) = 4(x + 2) \\ \\ 3x + = 4x + 8 \\ \\ 3 = 4x + 8 - 3x \\ \\ 3 = x + 8 \\ \\ 3 - 8 = x \\ \\ -5 = x \\ \\ x = -5 \\ \\

The final result is: x = -5.
4 0
3 years ago
13. What are the x-intercepts of<br> y = 2x2 + 6x - 20?
Brilliant_brown [7]

Answer:

x = -5, 2

Step-by-step explanation:

The first step to factor the equation is removing any factors/like terms that all of the variables share.

In the equation y = 2x^2+6x-20, all numbers are multiples of 2, therefore you can factor out 2 from to equation

y = 2(\frac{2x^2}{2} + \frac{6x}{2} -\frac{20}{2})

y = 2(x^2+3x-10)

Next, you can factor the equation in the parenthesis. Since x^2 is not multiplied by anything, you know that the factors of x^2 must be x and x. Therefore, the two factors of -10 must add up to 3. The only two factors of -10/x that add up to 3 are 5 * -2.

The factors of the equation are then (2)(x+5)(x-2)

Lastly, set up only the factors containing a x to 0 in order to solve for x-intercept.

x+5 = 0; x= 0-5 ; x = -5

x - 2 = 0; x = 0 + 2; x = 2

7 0
3 years ago
A president who has only served one tern​
slamgirl [31]

Answer: everyone accept Roosevelt

Step-by-step explanation:

4 0
3 years ago
Beach towels are currently selling 3 for 25 or 10 each what is the percent saved by buying 3
Virty [35]

Answer:

I am saving 16.67% when I buy 3 towels together.

Step-by-step explanation:

Beach towels are currently selling 3 for $25 or $10 each.

So, if I purchase 3 towels then I have to pay $25 in place of (3 × 10) = $30.

So, $(30 - 25) = 5 Dollars is saved by me on a price value of $30.

Therefore, the percentage of savings is calculated as \frac{5}{30} \times 100 = 16.67%.

Therefore, I am saving 16.67% when I buy 3 towels together. (Answer)

3 0
3 years ago
Can someone help me find the length of b of the unknown side in this triangle? Thanks! :)
creativ13 [48]

Answer: 4

Step-by-step explanation:

Using pythagoras theorem =>

b=\sqrt{c^2-a^2

b=\sqrt{5^2-3^2}

b=\sqrt{25-9}

b=\sqrt{16}

b=4

7 0
3 years ago
Read 2 more answers
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