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DaniilM [7]
3 years ago
12

Which of the following equations are equivalent? Check all that apply.

Mathematics
2 answers:
Verdich [7]3 years ago
5 0
 the answer is A. and B. 
Gemiola [76]3 years ago
5 0
Hi there!
We are basically asked to solve each equation for x. Here...
A. 
2 + x = 5
-2        -2
x = 3
B.
x + 1 = 4
x = 3
C.
9 + x = 6
x = -3
D.
x + (-4) = 7
x - 4 = 7
x = 11
E.
-5 + x = -2
x = 3
The answer is that equations A, B, and E are equivalent. Hope this helps and have a great day!

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Solve for x in the equation 2x^2-4x-9=29
Andrews [41]

Answer:

x = 1  ±2sqrt(5)

Step-by-step explanation:

2x^2-4x-9=29

Add 9 to each each side

2x^2-4x-9+9=29+9

2x^2-4x=38

Divide by 2

2/2x^2-4/2x=38/8

x^2 -2x =19

Complete the square

x^2 -2x + (-2/2)^2 = 19 +(-2/2)^2

x^2 -2x +1 = 19+1

(x-1)^1=2 = 20

Take the square root of each side

sqrt((x-1)^2) = ±sqrt(20)

x-1 =  ±sqrt(20)

Add 1 to each side

x-1+1 = 1  ±sqrt(20)

x = 1 ±sqrt(20)

Simplifying the square root of 20

x = 1  ±sqrt(4)sqrt(5)

x = 1  ±2sqrt(5)

3 0
3 years ago
The students in Mr. Nolan's class are writing expressions for the perimeter of a rectangle of side length ? and width w.
uranmaximum [27]
You wanna know witch student is correct?
6 0
2 years ago
Mario invests 1,500 in a savings account that earns 2% interest a year. He also plans to set aside $50 cash a month. A:2100(1.02
Sedbober [7]

Answer:

<em>1500(1.02)^x  +   600x</em> is how much he has in savings at the end of x years where it be in the bank or elsewhere

Step-by-step explanation:

x is in years

Let's just think about the investment of 1500 in an account earning 2% per year.

Before the years even start, you are at 1500 ( present value).

The next year (year 1), it would be 1500*.02+1500=(1500)(1.02).

The next year (year 2), it would be 1500(1.02)(.02)+1500(1.02)=1500(1.02)(1.02).

We keep multiplying factors of (1.02) each time.

So for year x, you would have saved 1500(1.02)^x.

Now we are saving 50 cash per month. Per year this would be 12(50) since there are 12 months in a year.  12(50)=600.  

So the first year you would have 600.

The second year you would have 600(2) or 1200.

The third year you would have 600(3) or 1800.

Let's put this together:

1500(1.02)^x  +   600x

4 0
3 years ago
I dont get this question, anyone help me please
prisoha [69]
Its a line plot, for every number that is listed put a mark above the number on the number line. So if there was 3 6's, on the number line above the 6, put 3 marks like dots or x's to represent the amount of 6.
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4 0
3 years ago
In 1894, women were granted the right to vote in South Australia.
julsineya [31]
2009 - 1894 = 115

That appears to be the same number as
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7 0
3 years ago
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