Find the area of a square

Mathematics

2 answers:

Phoenix [80]2 years ago

3 0

Answer:

Step-by-step explanation:

area =l^2

=7^2

=49 km^2

GenaCL600 [577]2 years ago

3 0

Answer:

$area \: of \: square \: = {side}^{2} \\ area \: of \: square \: = {7}^{2} \\ area \: of \: square \: = 49 {km}^{2}$

<h3>RIGHT OPTION IS C</h3>

Step-by-step explanation:

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Anika [276]

Answer:

Step-by-step explanation:

Given

a = $\frac{1}{x}$ - $\frac{1}{y}$ = $\frac{y-x}{xy}$ ← as a single fraction

Thus

$\frac{1}{a}$ = $\frac{1}{\frac{y-x}{xy} }$ = $\frac{xy}{y-x}$ → A

6 0

3 years ago

Jessica has an account with a credit union. Her account earns 2.4% simple interest yearly. Exactly a year and a half ago, she op

Dafna1 [17]

The basic equation for interest is the investment amount(x) times the time in years(y) times the percent of interest(z).

That makes the equation:

x·y·z= amount with interest.

Lets plug in the numbers:

$900 x 1.5 x 2.4%

Now turn the percent into a decimal:

2.4% ----> .024

Now the equation is:

$900 x 1.5 x .024

Now do the math:

$900 x 1.5 = 1350
1350 x .024 = 32.4
1350 + 32.4 = 1382.4

The final answer is $1382.40

Hope this helps!

6 0

3 years ago

Solve the system using the substitution method<br> 6x - 2y = -4<br> y= 3x + 2

Anit [1.1K]

Answer:

Step-by-step explanation:

6x - 2y = -4

y= 3x + 2

We see that y = 3x + 2 so we can use that value of Y everytime we see i in the other equation.

6x - 2(3x +2) = -4

Now usually we'd we simply solve for X.

6x - 6x -4 = -4