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3 years ago

Helppp me understand plssss

Mathematics

1 answer:

hram777 [196]3 years ago

8 0

Convert the mixed number into improper fraction:
$-\frac{\frac{8}{5}}{-\frac{2}{3}}$

Multiply by reciprocal:
$-\left(-\frac{24}{10}\right)$
$-\frac{1\frac{3}{5}}{-\frac{2}{3}}$

$\frac{12}{5}$

Convert improper fraction to mixed number
$2\frac{2}{5}$

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Simplify the following problem.<br> (-8+61) +(6+61)

Travka [436]

Answer: -8+61 = 53 and 6+61 = 67

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2 years ago

What is the area of a triangle with vertices (3,0) (9,0) (7,6)

Nezavi [6.7K]

Answer:

The area of the triangle is of 21 units of area.

Step-by-step explanation:

The area of a triangle with three vertices $(x_1,y_1),(x_2,y_2),(x_3,y_3)$ is given by the determinant of the following matrix:

$A = \pm 0.5 \left|\begin{array}{ccc}x_1&y_1&1\\x_2&y_2&1\\1_3&y_3&1\end{array}\right|$

In this question:

Vertices (3,0) (9,0) (7,6). So

$A = \pm 0.5 \left|\begin{array}{ccc}3&0&1\\9&0&1\\7&7&1\end{array}\right|$

$A = \pm 0.5(3*0*1+0*1*7+1*9*7-0*7*1-0*9*1-3*1*7)$

$A = \pm 0.5*(63-21)$

$A = \pm 0.5*42 = 21$

The area of the triangle is of 21 units of area.

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2 years ago

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AnnyKZ [126]

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3 years ago

State the hundred thousands place for 7,832,906,215

juin [17]

Answer:

Step-by-step explanation:

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3 years ago

Sing acts are 5 min long and comedy acts are 3 min long. The show has 12 acts and last 50 min. How many singing acts and how man

ryzh [129]

Answer

so there are 7 singing acts and 5 comedy acts.

Step-by-step explanation:

Let x= number of singing acts.

Let y= number of comedy acts.

We will take x+y=12 as our first equation, as there are 12 shows in total. We will take 5x+3y=50 as our second equation as there are 50 total minutes, and singing acts are 5 mins and comedy acts are 3 mins.

We solve x+y=12

Y=-x+12

We know y=-x+12, so we will substitute that for the y in the second equation.

1. Substitute 5x+3(-x+12)=50

2. Distribute 5x-3x+36=50

3. Solve 2x+36=50

2x=14

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Now that we have found x, we will find y by substitute the x in 5x+3y=50 with the value, 7, that we found for x.

5(7)+3y=50

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2 years ago