All categories

4 years ago

Someone help me quick!

Mathematics

1 answer:

oksano4ka [1.4K]4 years ago

5 0

20k + 50
so remember factorise means to add brackets in.this will be a single bracket so we need a number / letter that will go outside the bracket.in this case it will be a number because 50 dosent have a letter only 20 has a letter which is k. you need to put the highest number that goes into both numbers on the outside of the bracket which is 10.
20k + 50
=10(2k + 5)
to check if it's right we simplify it out using a fraud method or whoever method your comfortable with.
10(2k+5)
10*2k=20k
10*5=50
=20+50k
so it is factorised correctly.
answer is 10(2k+5)

You might be interested in

Determine if the two triangles are congruent. If they are, state how you know.

earnstyle [38]

Answer:

A. SAS

Step-by-step explanation:

Since the marked angle is between the marked sides, and the corresponding sides are marked as congruent, the two triangles are congruent by SAS (side angle side).

7 0

3 years ago

Read 2 more answers

Find the distance between the two points in simplest radical form.

adoni [48]

Answer:

y=−2/5x+4/5y

Step-by-step explanation:

Hope's this helps

6 0

3 years ago

If g (x)= 3/2x+4, what is the value of g(2)?

Semmy [17]

Answer:

g(2) =7

Step-by-step explanation:

g (x)= 3/2x+4

Let x = 2

g (2)= 3/2 *2+4

= 3 +4

= 7

6 0

3 years ago

Read 2 more answers

What is the percent of decrease from 500,000 to 70,000?

Lena [83]

Answer:

14%

Step-by-step explanation:

$\frac{70,000}{500,000} :\frac{y}{100}$

y × 500,000 = 100 × 70,000

500,000y = 7,000,000

500,000y ÷ 500,000 = 7,000,000 ÷ 500,000

y = 14

4 0

3 years ago

According to the Sleep Foundation, the average night’s sleep is 6.8 hours. Assume the standard deviation is .6 hours and that th

Ivan

Answer:

9.18% probability that a randomly selected person sleeps 6 hours or less

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 6.8, \sigma = 0.6$

What is the probability that a randomly selected person sleeps 6 hours or less?

This is the pvalue of Z when X = 6. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{6 - 6.8}{0.6}$

$Z = -1.33$

$Z = -1.33$ has a pvalue of 0.0918

9.18% probability that a randomly selected person sleeps 6 hours or less

5 0

3 years ago