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Anarel [89]
3 years ago
11

Solve the system of equations in the workspace below: 2x - y = 16 x + y = 5

Mathematics
1 answer:
Ad libitum [116K]3 years ago
7 0
Already you can see that -y and y will make a zero
add both together
3x=21
x=7

plug x in
7+y=5
y=-2
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If a=under root s(s-a)(s-b)(s-c) then the value of a, when a =3 b =4c = 5 and s =a+b+c by 2
kramer

Answer:

6

Step-by-step explanation:

Here it's given that ,

\sf\red{\longrightarrow} A=\sqrt{s(s-a)(s-b)(s-c)}

Also ,

\sf\red{\longrightarrow} s =\dfrac{a+b+c}{2}

And we need to find out the value of A , when

  • a = 3
  • b = 4
  • c = 5

So , on substituting the respective values to find s we have ,

\sf\red{\longrightarrow} s =\dfrac{3+4+5}{2}=\dfrac{12}{2}=\bf{6}

Now let's find out A as ,

\sf\red{\longrightarrow} A = \sqrt{6(6-3)(6-4)(6-5)} \\

\sf\red{\longrightarrow}A =\sqrt{6 * 3 * 2 * 1}\\

\sf\red{\longrightarrow} A = \sqrt{3^2 * 2^2 *1^2}\\

\sf\red{\longrightarrow}A = 3*2\\

\sf\red{\longrightarrow}\boxed{\qquad \blue{\bf A = 6 \qquad}}

7 0
2 years ago
Pls pls help:( ASAP
katrin [286]

Answer:

The answer is 12.64 ft.

Step-by-step explanation:

From the figure it is clear that slope is the hypotenuse which we have to find while the other two sides are legs of the triangle whose lengths are known.

so the pitch of the roof is 12.64 ft.  i explained in the figure below as well.

4 0
3 years ago
Which of the following is the solution to the following systems of inequalities? (picture included)
Ymorist [56]

Answer:

  C.  (see the attachment)

Step-by-step explanation:

Both inequalities include the "or equal to" case, so both boundary lines will be solid. That excludes choices A and D.

The first inequality is plotted the same way in all graphs, so we must look at the second inequality. The relationship of y and the comparison symbol is ...

  -y ≥ (something)

If we multiply by -1, we get ...

  y ≤ (something else)

This means the solution space will be <em>on or below (less than or equal to) the boundary line</em>. This is the shaded area in graph C. (Graph B shows shading <em>above</em> the line.)

___

<em>Further comment</em>

Since the boundary for the second inequality is fairly steep, "above" and "below" the line can be difficult to see. Rather, you can consider the relationship of x to the comparison symbol. For the second inequality, that is ...

  x ≥ (something)

indicating the solution space is <em>on or to the right of the boundary line</em>.

3 0
3 years ago
Help! <br> I do not understand a single thing lol I’m sorry&lt;3
kati45 [8]

=<em> </em><em>8</em><em> </em>

<em>step-by-step</em><em> </em><em>explanation:</em>

<em>evaluate</em><em> </em>

<em>-8c⁴</em><em> </em><em>d </em><em>+</em><em>4</em><em>c</em><em>²</em><em> </em><em>d²</em><em> </em><em>+</em><em> </em><em>1</em><em>6</em><em>c</em><em> </em><em>-</em><em> </em><em>2</em><em>d</em>

<h2 />

<em>when </em><em>c </em><em>=</em><em>-</em><em>1</em><em> </em><em>,</em><em>d=</em><em>4</em>

<em>=</em><em>8</em>

<h2><em><u>hope</u></em><em><u> it</u></em><em><u> helps</u></em><em><u>!</u></em></h2>

<em><u>#</u></em><em><u>c</u></em><em><u>a</u></em><em><u>r</u></em><em><u>r</u></em><em><u>y</u></em><em><u> </u></em><em><u>on</u></em><em><u> learning</u></em>

4 0
2 years ago
Read 2 more answers
Somebody hlp pls?????
steposvetlana [31]

Answer:

7

Step-by-step explanation:

l x l = √65 x √65 - 4 x 4

l x l = 65 - 16

l x l = 49

l = √49

l = 7

<em>Hope that helps! :)</em>

<em>-Aphrodite</em>

6 0
3 years ago
Read 2 more answers
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