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4 years ago

What is j(3) equal to?

Mathematics

1 answer:

kakasveta [241]4 years ago

6 0

Plug in 3 for t

j(3) = 4(3)²

First square the number in parenthesis

3 x 3 = 9

j(3) = 4(9)

Finally, multiply.

f(3) = 36

f(3) = 36 is your answer

hope this helps

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PLEASE HELP WITH THIS ONE QUESTION

Genrish500 [490]

$Hello$ $There!$

$2x^4+16x=0$

$Factor:$ $2x^4+16: 2x(x+2)(x^2-2x+4)$

$2x(x+2)(x^2-2x+4)=0$

You got to used the Zero Factor Principle:

$x=0$ $or$ $x+2=0$ $or$ $x^2-2x+4=0$

$Solve: x+2=0:x=-2$

$Solve: x^2-2x+4=0: x=1+\sqrt{3}i,x=1-\sqrt{3} i$

ANSWER:

$x=0,x=-2,x=1+\sqrt{3} i,x=1-\sqrt{3} i$

Hopefully, this helps you!!

$AnimeVines$

7 0

3 years ago

The length of a rectangle is 5cm more than its width. The perimeter of the rectangle is 46cm. Find the length and width of the r

strojnjashka [21]

Answer:

length= x+5

width= x

perimeter= 46 cm

2(x+5)+2x=46

2x+10+2x=46

4x=36

x= 9

hope this helps ! :)

7 0

3 years ago

There are 70 girls and 50 boys in 6th grade in a middle school. Of these students 12 girls and 8 boys walked home from school. W

timurjin [86]

Answer is 24 percent

Explanation:
70 + 50 = 120
12 + 8 = 20
20 percent of 120 = 24%

4 0

3 years ago

A survey is planned to estimate the proportion of voters who support a proposed gun control law. The estimate should be within a

Burka [1]

Complete Question

A survey is planned to estimate the proportion of voters who support a proposed gun control law. The estimate should be within a margin of error of $\pm 5\%$ with 99 %confidence, and we do not have any prior knowledge about the proportion who might support the law. How many people need to be included in the sample?

Answer:

The value is $n = 666$

Step-by-step explanation:

From the question we are told that

The margin of error is $E = 0.05$

From the question we are told the confidence level is 99% , hence the level of significance is

$\alpha = (100 - 95 ) \%$

=> $\alpha = 0.01$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 2.58$

Here we will assume that the sample proportion of those who support a proposed gun control law to be $\^ p = 0.5$ because from the question they do not have any prior knowledge about the proportion who might support the law

Generally the sample size is mathematically represented as

$n = [\frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * \^ p (1 - \^ p )$

=> $n = 666$

8 0

3 years ago

Whenever he visits Belleville, Andrew has to drive 15 miles due north from home. Whenever he visits Fairfax, he has to drive 8 m

Artemon [7]

Answer:

17 miles away

Step-by-step explanation:

if you draw, you get a right angle triangle.

use pythagorean theorem

c² = a²+b²

c² = 15² + 8²

c² = 225 + 64

c= sqrt(289)

c = 17

7 0

3 years ago