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3 years ago

Let f(x)=2x^2−1.

1 answer:

8 0

If we begin with f(x)=2x^2−1 and graph this quadratic, and then translate the entire graph 2 units to the left, we get g(x) = 2(x+2)^2 -1.

Were it 4 units to the left, then h(x) = 2(x+4)^2 - 1 (example only)

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What is (3/4)³ in fraction form

suter [353]

27/64 . because you do 3/4 to the third power (3x) which gives you that

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3 years ago

Erik and Nita are playing a game with numbers. In the game, they each think of a random number from zero to 20. If the differenc

klasskru [66]

Given:
Choose a number between 0 and 20.
If the difference is less than 10 then Eric wins.
Let us x is Eric's number. 0 < x < 20
If Eric wins. |x -7| < 10
|x-7| < 10 → -10 < x-7 < 10 → -10 + 7 < x - 7 + 7 < 10 + 7 → -3 < x < 17

Taking into account that the number must be given between 0 and 20.
0 < x < 20
-3 < x < 17

→ 0 < x < 16

7 0

4 years ago

Read 2 more answers

A box contains 84 chocolates, of which 63 are dark chocolates. The rest are milk chocolates. What is the ratio of milk chocolate

loris [4]

Answer: 21:84

Explanation:

84-63=21, and then just do 21:84 lol

3 0

3 years ago

A survey was conducted to see what kinds of activities high school and college students liked best. The table shows the results

Alja [10]

Answer:

C & D

Step-by-step explanation:

Because A&B are wrong

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3 years ago

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A study of 40 English composition professors showed that they spent, on average, 13 minutes correcting a student's term paper. T

photoshop1234 [79]

Answer:

90% confidence interval for the mean grading time of all composition papers.

(12.47981 , 13.52019)

Appropriate inequality

The interval is ( 12.47981 < μ < 13.52019)

Step-by-step explanation:

Explanation:-

Given sample size 'n' = 40

Mean of the sample = 13 minutes

standard deviation = 2 min

level of significance = 0.10 or 90%

90% confidence interval for the mean grading time of all composition papers.

$( x^{-} - Z_{0.1} \frac{S.D}{\sqrt{n} } , x^{-} + Z_{0.10} \frac{S.D}{\sqrt{n} } )$

$( 13 - 1.645 \frac{2}{\sqrt{40} } , 13 +1.645 \frac{2}{\sqrt{40} } )$

( 13 - 0.52019 , 13 + 0.52019)

(12.47981 , 13.52019)

The interval is ( 12.47981 < μ < 13.52019)

7 0

3 years ago