3 years ago

Is the equation written in standard form-2x + 3y= -5

Mathematics

1 answer:

morpeh [17]3 years ago

7 0

The standard form: ax + by = c

and your equation is: -2x + 3y = - 5 (Yes this is written in standard form)

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The area of a circle is 28.26 square kilometers. What is the circles diameter

irinina [24]

Answer:

6km

Step-by-step explanation:

Area of circle = πr²

Where r = radius, π= 3.14, A = 28.26km²

A = 3.14 x r²

3.14 r2 = 28.26

Divide both sides by 3.14

r²= 28.26/3.14

r² = 9

Square root both sides

r= √9

r= 3

Radius = 3km

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Diameter = 3 x 2

Diameter = 6km

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If a people plane flies 600 miles an hour, and

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Step-by-step explanation:

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Answer:13 over 20

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Step-by-step explanation:

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3 years ago

TIMED! Can somebody please help me with this?

kondaur [170]

Answer:

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Step-by-step explanation:

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3 years ago

Hi! Can anybody help me with these problems? I have to do 2 step equations.

Dovator [93]

1) 3.8x + 5.2x - 6.7 = 11.3
9x = 11.3 + 6.7
9x = 18
x = 18/9
x = 2

2) 7.8y - 4.9 - 5.4y = 2.3
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y = 7.2/2.4
y = 3

3)

$\frac{2}{3} x - 5 = 1$
$\frac{2}{3} x = 5 + 1$
$\frac{2}{3} x = 6$

Multiply by 3 by both sides:

$3 \times \frac{2}{3} x = 3 \times 6$

Simplify:

2x = 18
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x = 9

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$\frac{7}{5} y = 3 - \frac{1}{5}$

Do lowest common denominator:

$\frac{7}{5} y = \frac{(5 \times 3) - 1}{5}$
$\frac{7}{5} y = \frac{15 - 1}{5}$
$\frac{7}{5} y = \frac{14}{5}$

Simplify by 5 by both sides:

$7y = 14$
$y = \frac{14}{7}$
$y = 2$

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3 years ago

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