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jeka57 [31]
3 years ago
8

Graph the linear equation 7x - 3y = -21.

Mathematics
2 answers:
nydimaria [60]3 years ago
8 0

Answer: ok...

Step-by-step explanation:

Arturiano [62]3 years ago
3 0

Answer:-21

Step-by-step explanation:

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Julli [10]
X= - 2y/5+ 39/5. hth'

4 0
3 years ago
Plz help me do this homework<br><img src="https://tex.z-dn.net/?f=6ac%20-%2015ad%20-%208bc%20%2B%202bd" id="TexFormula1" title="
Ahat [919]

The given polynomial is

→ 6 ac - 15 a d- 8 b c + 2 b d

→ 3× 2×a×c - 3×5×a×d - 2×2×2× b×c + 2×b×d

→ 3 a ( 2 c -5 d)  - 2 b(4 c -d)

7 0
4 years ago
A box contains 6 black pens, 4 blue pens, and 7 red pens. Without looking, Clarissa randomly picks a black pen out of the box. I
Irina18 [472]

Answer:

31.35%

Step-by-step explanation:

<h3><u>Initial</u><u> </u><u>reading</u><u>:</u></h3>

In the box, there are:

  • 6 Black pens
  • 4 blue pens
  • 7 red pens

Total number of pens in the box = 6 + 4 + 7

<u>= 17</u>

<em>If we count pens as outcomes the total number of possible outcomes are 17</em>.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

<h3><u>New</u><u> </u><u>reading</u><u>:</u></h3>

Clarissa takes out a black pen from the box.

That reduces the number of black pens by 1 which increases the total number of pens by 1 as well.

So now:

  • Number of black pens = 6 - 1 =<u> 5 </u>
  • Total number of pens = 17 - 1 =<u> </u><u>16</u><u> </u>

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

<h3><u>Probability</u><u>:</u></h3>

\boxed{ \mathsf{probability =  \frac{favorable \: outcomes}{total \: outcomes} }}

If we want her to pick up a black pen, and she ends up picking one. So, we can say that the outcome is in our favor.

That makes it,

  • the number of favorable outcomes = number of black pens

= 5

  • and total outcomes = Total number of pens

= 16

\implies\mathsf{probability =  \frac{5}{16} }

For showing it as some percent we'll just multiply the fraction by 100

\implies \mathsf{ \frac{5}{16} \times 100 }

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

<h3><u>As</u><u> </u><u>a</u><u> </u><u>percent</u><u>:</u></h3>

\implies \mathsf{ \underline{ 31.25 \: \% } }

4 0
3 years ago
A tent guy line supports one of the upright tent poles. It runs from the top of the pole to a peg in the ground two and a half m
Inessa [10]

Answer:

258 cm

Step-by-step explanation:

Given:

Distance from the base of the pole to the base of a tent guy line is 2\frac{1}{2}

Length of a tent guy line is 359 cm

To find: Height of the upright tent pole

Solution:

Let AB denotes the pole and AC denotes a tent guy line.

According to Pythagoras theorem, in a right angled triangle, square of hypotenuse is equal to sum of squares of other two sides.

AC^2=AB^2+BC^2

AC=359 cm\\AB=x\\BC=2\frac{1}{2}\,m=\frac{5}{2}\,m=\frac{5}{2}\times 100=250\,cm

Therefore,

(359)^2=x^2+(250)^2\\128881=x^2+62500\\128881-62500=x^2\\66381=x^2\\x=257.6\,cm\approx 258\,cm

Download pptx
8 0
3 years ago
Determine in which direction the parabola below opens. y=-4x^2+8x+12
Sergio [31]

Down

The formula for a quadratic equation is y = ax^2 + bx + c. In this case, a = -4, b = 8, and c = 12. The direction of the parabola can be determined by a. If a is positive, the parabola opens upwards, and if a is negative, the parabola will open downwards.

3 0
3 years ago
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