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4 years ago

Slove the equation 3x+5y=15 for y

Mathematics

1 answer:

Rina8888 [55]4 years ago

5 0

Answer:

y=(15-3x)/5 or y=3-(3/5)x

Step-by-step explanation:

Subtract 3x on both sides: 5y=15-3x

Divide both sides by 5: y=3-3/5x

Hope this helped!

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Evaluate 8 - 4.7y - x when y= -1 and x= 2.

Marat540 [252]

Substitute in the values for y and x into the equation.

so..

8 - 4.7(-1) - (2) solve the equation
8 + 4.7 -2
12.7 - 2
10.7

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3 years ago

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ella [17]

1st one I would guess survey 2nd the answer is 64

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3 years ago

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PLEASE HELP ASAP!!!! Thanks!!

tino4ka555 [31]

Answer:

1.2 cm

Step-by-step explanation:

Quadrilateral circumscribing a circle is a quadrangle whose sides are tangent to a circle inside it (see attached diagram).

The area of circumscribed quadrilateral is

$A=p\cdot r,$

where $p=\dfrac{a+b+c+d}{2}$ is semi-perimeter and r is radius of inscribed circle.

In your case, $A=12\ cm^2$

If a quadrilateral is circumscribed over the circle, then the sum of opposite sides is equal, so

$a+c=b+d=10\ cm,$

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Now

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8 0

3 years ago

I need help with this problem 2y=x-4 4x+3y=5

attashe74 [19]

Answer:

Point form : (2,-1)

Equation form : x=2,y=-1

Step-by-step explanation: Solve for the first variable in one of the equations, then substitute the result into the other equation.

Hope this helps you out! ☺

-Leif Jonsi-

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3 years ago

A tea infuser in the shape of a right rectangular pyramid is 7.9 cm tall and has a base 3 cm long and 1.5 cm wide. To make the b

kaheart [24]

Answer:

28.44 cm³

Step-by-step explanation:

Full volume is:

V = lwh
V = 3*1.5*7.9 = 35.55 cm³

Volume of tea required:

35.55*80/100 = 28.44 cm³

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3 years ago