We notice that the answer choices have only the first equation changed. The equivalent of the first equation must have the same ratios of coefficients.

x-coefficient : y-coefficient : constant

= 2 : 1 : -15 . . . . . in the given equation

2 : -2 : 30 = 1 : -1 : 15 . . . upper left — not the same

-4 : -2 : -15 = 4 : 2 : 15 . . . upper right — not the same

-4 : -2 : 30 = 2 : 1 : -15 . . . lower left — same as the given equation

-4 : 1 : 30 = 4 : -1 : -30 . . . lower right — not the same

5 0

3 years ago

Factor the following termsx^2-100

mart [117]

Answer:

$x^2-100=(x-10)(x+10)$

Explanation:

Given the expression:

$x^2-100$

This can be a difference of two squares like:

$x^2-10^2$

and this is:

$(x-10)(x+10)$

5 0

1 year ago

Explain why it might be important to be able to work with and manipulate fractions when working in construction.

nirvana33 [79]

Answer:

Addition and Subtraction with different denominators. If the denominators are different then a common denominator needs to be found.

2 pages.

hope this helps

4 0

2 years ago

At midnight what temperature is -6C. At midday the temperature is -9C. By how much did the temperature rise ?

Zielflug [23.3K]

Answer:

It didn’t go up, it went down 3 degrees

Step-by-step explanation:

It’s negative degrees so the less negative it is the higher it is.

6 0

3 years ago

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