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2 years ago

Which direction does the graph of f(x) = −18 + x2 − 3x open?

1 answer:

7 0

Please write this equation as <span>f(x) = −18 + x^2 − 3x

Rewrite it in descending order by powers of x: f(x) = x^2 - 3x - 18

Since the coefficient of the x^2 term is +, the graph opens UP.</span>

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Help help asap please please please

dem82 [27]

Answer:

-54

Step-by-step explanation:

-378 ÷ 7 = -54

(-378 is the altitude)

(7 is the amount of minutes)

Hope this helps!!

Have a great day!!

6 0

3 years ago

Here are the first four terms of a number sequence.

AleksAgata [21]

8,14,20,26

8 to 14 is 6
14 to 20 is 6
20 to 26 is 6

The next term will be 26 + 6 = 32

Because there is a gap of 6 between each number

5 0

3 years ago

What is the solution of the inequality x^3 + 3x^2 > 7x + 6

Aleksandr-060686 [28]

Answer: 54

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

Add. *

Ann [662]

Answer:

31x³-60x²+7x-75

Step-by-step explanation:

(30x³-49x³+7x)+(50x³-60x²-75)

(-19x³+7x)+(50x³-60x²-75)

-19x³+50x³+7x-60x²-75

31x³-60x²+7x-75

3 0

3 years ago

Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 99% confidenc

quester [9]

Answer: 18

Step-by-step explanation:

The formula to find the minimum sample size is given by :_

$n=(\dfrac{z^*\cdot \sigma}{E})^2$

, where $\sigma$ = population standard deviation.

z*= critical z-value.

E= Margin of error.

Given : $\sigma= 13$

E= ± 8

We know that critical value corresponding to 99% confidence level = z*=2.576 [Using z-table]

Then, the required sample size would be :

$n=(\dfrac{(2.576)\cdot (13)}{8})^2$

$\Rightarrow\ n=(4.186)^2$

$\Rightarrow\ n=17.522596\approx18$ [Round to next integer.]

Hence, the required minimum sample size = 18

4 0

3 years ago