All categories

3 years ago

For the function f(x)= x/4 find x if f(x)=-8

Mathematics

2 answers:

guapka [62]3 years ago

7 0

Remark

Let y = f(x)

Now we have y = x/4

It is much easier to solve in this form

y = - 8

- 8 = x/4 Multiply both sides by 4

-8 * 4 = (x/4) * 4

- 32 = x <<<< Answer

olga2289 [7]3 years ago

7 0

In other words, equate x/4 and -8 and solve for x: Mult. both sides of this equation by 4: x = -32

You might be interested in

54 is 120% of what number? Explain please!

Nataly [62]

$\displaystyle \text{54 is 120\% of what number} \\ \text{is will be = } \\ \text{of will be } \cdot \\ \text{what number will be z} \\ ---------- \\ 54=120\% \cdot z \\ \\ 54= \frac{120}{100}\cdot z \\ \\\\ z \cdot \frac{120}{100}=54 \\ \\ \\ z=54 : \frac{120}{100} \\ \\ \\ z=54 \cdot \frac{100}{120} \\ \\ \\ z= \frac{5400}{120} =45$

3 0

4 years ago

Read 2 more answers

A bead is chosen randomly from a golf bag. If 40% of the beads are Spears and 30% of the Spheres are blue what's the probability

Anit [1.1K]

Answer:

c. 12%

Step-by-step explanation:

40% of the beads are spears, you can convert it to 0.4

30% of the spheres are blue, you can convert it to 0.3

=> probability choosing blue sphere = (0.4 * 0.3)*100(%) = 12%

My explaination may not really clear but the answer is correct. Hope this help!

5 0

4 years ago

Read 2 more answers

5.01=m/1.2 solve for m

NNADVOKAT [17]

Answer:

answer is m

6.012

Step-by-step explanation:

3 0

3 years ago

A credit card company is about to send out a mailing to test the market for a new credit card. From that sample, they want to es

Sergeeva-Olga [200]

Answer:

$n=\frac{0.005(1-0.005)}{(\frac{0.001}{1.96})^2}=19111.96$

And rounded up we have that n=19112

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical value would be given by: