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MAVERICK [17]
3 years ago
8

18 is what percent of 20

Mathematics
1 answer:
nirvana33 [79]3 years ago
7 0
18 is 90% of 20
That is the correct answer :)
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What is the equation for a line passing through (-2,3) and perpendicular to y= -1/2+1 ?
nata0808 [166]

Answer:

y=2x+7

Step-by-step explanation:

<u><em>The correct question is</em></u>

what is the equation for a line passing through (-2,3) and perpendicular to y= -1/2<em>x</em>+1 ?

Remember

If two lines are perpendicular, then their slopes are opposite reciprocal (the product of their slopes are equal to -1)

The slope of the given line is m=-1/2

so

the opposite reciprocal is m=2

<em>Find the equation of the line in point slope form</em>

y-y1=m(x-x1)

we have

m=2\\point\ (-2,3)

substitute

y-3=2(x+2)

<em>Convert to slope intercept form</em>

y=mx+b

isolate the variable y

y-3=2x+4

y=2x+4+3

y=2x+7

3 0
3 years ago
Emma is playing miniature golf. Her ball is 2 feet to the left of the right-hand wall. The hole is 4 feet to the left of the wal
NISA [10]

Answer:

<u></u>

  • <u>She should aim 6 feet down the wall</u>

Explanation:

The diagram attached sketches the situtation.

Since the angle with which the ball hits the wall is the same with which it bounces, angle β is the same for the two shown triangles.

Then, since both are right triangles, then all the angles are congruent and the triangles are similar. Hence, you can equal the ratios of the sides, to make an equation:

  • x/4 = y/2 ⇒ x = 2y

You have other equation:

  • x+ y = 18

Substitute

  • 2y + y = 18
  • 3y = 18
  • y = 18/3
  • y = 6 ← this is the distance down the wall where the ball should hit

  • x = 2(6) = 12

Then, she should aim 6 feet down the wall.

8 0
4 years ago
When graphing a polynomial function, what determines what the graph will look like at the far left side? Explain your answer.
dimulka [17.4K]

Answer:

2

Step-by-step explanation:

this will help i think this will be the answer i am not sure

8 0
4 years ago
Need some help with this please
amm1812

Answer: The answer is that he cleaned one room


Step-by-step explanation:

Because he charged in total 77 dollars and he charged 77 dollars per room, so 77*1=77=c

6 0
3 years ago
The graph represents the height y, in meters, above the ground of a water balloon x seconds after it is dropped from a window.
Nezavi [6.7K]
The balloon is in the air for 3sThe max height is 44mThe max height occurs at x=0

6 0
3 years ago
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