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leonid [27]
3 years ago
7

The equation below describes a parabola. If a is negative, which way does the parabola open?

Mathematics
2 answers:
const2013 [10]3 years ago
6 0
Given equation : y=ax^2 
Taking a to the other side we have, x^2=(1/a)*y
 This equation describes a parabola that opens up.
 When a is negative, the focus is on the negative y-axis, therefore, the parabola opens down.
 The answer is a. down.
sladkih [1.3K]3 years ago
4 0

Answer:down

Step-by-step explanation:

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The graph would be continuous because height is a continuous variable as if can be exactly, say, 167 cm, but it can also be 153.53 cm.
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X/3 + 5 = 6.8<br><br> The x/3 is a fraction! please I need an answer!!!
Naya [18.7K]

Answer:

x=5.4

Step-by-step explanation:

x/3+5=6.8

     -5  -5

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x/3= 1.8

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What is the value of log9 9?
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Answer:

The answer is 1

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3 years ago
Read 2 more answers
Explain what mistake was made in the problem below and what should be the
romanna [79]

Answer:

Instead of moving the 3x to the opposite side of the equation they moved the 2x. And the correct answer is x=-6 not x=6.

Step-by-step explanation:

Student Work:

2(x + 4) – 8 = 3x+10-4

2x + 8–8 = 3x + 6

2x = 3x + 6

- 3x – 3x

X = 6

My work:

2(x+4)-8=3x+10-4

2x+8-8=3x+6

2x=3x+6

-x=6

x=-6

7 0
3 years ago
PSEG Long Island charges its residential customers a little monthly service charge plus an energy charge based on the amount of
german

Using linear function concepts, it is found that:

  • a) It costs $0.1 for each kilowatt hour of electricity used in excess of 250 kWh.
  • b) f(90) = 46.6, which is the cost of 340 kWh of consumption in a month.

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

A <em>linear function </em>has the format given by:

y = mx + b

In which:

  • m is the slope, which is the rate of change, that is, how much y changes when x changes by 1.
  • b is the y-intercept, which is the value of y when x = 0.

The equation for the cost of h kilowatt hours (kWh) of electricity used in excess of 250 kWh is of:

C = f(h) = 37.6 + 0.1h

Item a:

  • The slope is of m = 0.1, which means that it costs $0.1 for each kilowatt hour of electricity used in excess of 250 kWh.

Item b:

f(90) = 37.6 + 0.1(90) = 37.6 + 9 = 46.6

250 + 90 = 340.

f(90) = 46.6, which is the cost of 340 kWh of consumption in a month.

A similar problem is given at brainly.com/question/24808124

8 0
2 years ago
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