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inessss [21]
3 years ago
14

How do we express four less than the square of a number?

Mathematics
1 answer:
Gre4nikov [31]3 years ago
4 0

Answer:

x^{2} - 4

Step-by-step explanation:

in this case, x is your number. we will always note square with the tiny two at the top of the number.

Four less than anything is easily shown with a minus four.

eg. four less of 12 square:

12^{2}  - 4 = :)

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Solve 2x+3y=2<br> 5x-y=-29<br> By elimination
Andreyy89

Answer:

\huge\boxed{x=-5,\ y=4\to(-5,\ 4)}

Step-by-step explanation:

\left\{\begin{array}{ccc}2x+3y=2\\5x-y=-29&\text{multiply both sides by 3}\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}2x+3y=2\\15x-3y=-87\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad17x=-85\qquad\text{divide both sides by 17}\\.\qquad\dfrac{17x}{17}=\dfrac{-85}{17}\\.\qquad\boxed{x=-5}\\\\\text{Substitute it to the second equation:}\\\\5(-5)-y=-29\\\\-25-y=-29\qquad\text{add 25 to both sides}\\\\-25+25-y=-29+25\\\\-y=-4\qquad\text{change the signs}\\\\\boxed{y=4}

5 0
3 years ago
The perimeter of a rectangular field is 100 feet. Which *COULD NOT* be the length and width of the perimeter?
Rina8888 [55]

Answer:

D) L=50 W=50

Step-by-step explanation:

Just "plug and chug" these numbers and see which doesn't work.

A is not it, 20+30=50 (then *2 because we need 4 sides not just 2) 50*2=100

B isn't it, 10+40=50*2=100

C ain't it either 49+1=50*2=100

D is the answer 50+50=100*2=200

7 0
3 years ago
I’d like to know how to solve this problem.
sergiy2304 [10]
Can you show the problem? Those are the questions but I need the actual graph.
6 0
3 years ago
Whaich calculation and answer show how to convert 3/12 to a decimal
Zolol [24]

Answer:

0.25

Step-by-step explanation:

3/12 = 1/4

1÷4= 0.25

7 0
3 years ago
(-2 1/3 + 5 1/5) + 1 1/3 =
Iteru [2.4K]

4Answer:

exact form:

\frac{21}{5\\}

decimal form:

4.2

mixed number form:

4\frac{1}{5}

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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