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Andrew [12]
3 years ago
10

Solve the system of functions below: -9x = (-2x^2)-4-y x = (-y+6)/3

Mathematics
1 answer:
Sindrei [870]3 years ago
7 0

Point Form:

(1,3) (5,-9)

Equation Form:

x=1 y=3

x=5 y=-9

solve for the first variable in one of the equations, then substitute the result into the other equation.

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There are a lot of ways but here are a couple of examples.
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3 years ago
What is the circumference of a circle with a diameter of 20 inches
sergeinik [125]

Answer:

62.8 in

Step-by-step explanation:

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8 0
3 years ago
Find the cost in dollars of the operating a 60-W lamp continuously for 1 week when the power utility rate is 18 cents/kWh .
Alex
<h2>Answer:</h2>

The cost in dollars is:

                       $ 1.8144

<h2>Step-by-step explanation:</h2>

It is given that:

The 60-W lamp is operated  continuously for 1 week.

We know that:

  1 week=7 days

and 1 day=24 hours

This means that:

     1 week=24×7

i.e.  1 week= 168 hours

Also, 1 kW=1000 W

This means that:

 1 W=0.001 kW

Hence,

 60-W=0. 060 KW

i.e. Power= 0.60 KW

Hence, the energy consumed is:

Energy=Power×Time

i.e.

Energy=0.060×168

i.e.

Energy=10.08 KWh

Also, cost of 1 KWh=18 cents

We know that:

1 cent=0.01 dollar

This means that:

18 cents=0.18 dollar

i.e.

Cost of 1 KWh=$ 0.18

Hence, cost of 10.08 KWh is: $ (0.18×10.08)

i.e.

Cost of 10.08 KWh is: $ 1.8144

7 0
3 years ago
What is the exact volume of the cylinder? Cylinder with height of 6 inches and radius of 3 inches. 324π in3 18π in3 36π in3 54π
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Volume of a cylinder is pi*r^2*h where r = radius and h = height
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54 pi is the answer. mark me brainliest please!
8 0
2 years ago
Read 2 more answers
Write the inequality that goes with the graph that has an open
miskamm [114]

Answer:

x is greater than or equal to 7

Step-by-step explanation:

(line under alligator)

7 0
2 years ago
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