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2 years ago

Share £280 in the ratio 3:4

2 answers:

7 0

This is one method of finding the answer for this,

3:4, 3+4=7

3 part=3/7×280
= 120

4 part =4/7×280
=160
answer=
3:4
120:160
hope it helps....

aleksandrvk [35]2 years ago

3 0

Just in case you didn't understand them :)

So we start off by breaking it down!!
3:4, 3+4=7

In other words (or any at that lol) we find out that 280 can be broken off into 3 parts!

3 part=3/7×280 = 120
giving us 120 as the end result!

We also find out that 280 can be broken off into 4 parts!

4 part =4/7×280=160
Leaving us with 160

Meaning that now, we put the two new found ratios together to create our answer!! :)

So, 3:4 now equals 120:160

So your answer will be 120:160

 I hope this helps, I know that it helps for me when someone breaks it down for me! :)

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Joe heard from a reliable source that only 22% of people actually sleep 8 hours or more per night. You do a survey and find 58 o

Juliette [100K]

Answer:

95% Confidence interval: (31.32%,47.04%)

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 148

Number of people who sleep for 8 hours or longer, x = 58

$\hat{p} = \dfrac{x}{n} = \dfrac{58}{148} = 0.3918$

95% Confidence interval:

$\hat{p}\pm z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

Putting the values, we get:

$0.3918\pm 1.96(\sqrt{\dfrac{0.3918(1-0.3918)}{148}})\\\\ = 0.3918\pm 0.0786\\\\=(0.3132,0.4704)=(31.32\%,47.04\%)$

(31.32%,47.04%) is the required 95% confidence interval.

8 0

3 years ago

Which graph shows a rate of change of 1/2 between -4 and 0 on the x-axis?

galina1969 [7]

Answer:

Step-by-step explanation:

its the first one in edge

3 0

2 years ago

Read 2 more answers

Classify the polynomial. 3r^5-2r^2+5r

ella [17]

Answer: 5th degree trinomial

The degree is 5 because its the largest exponent of the single variable polynomial.

It's a trinomial because there are 3 terms. The terms are separated by a plus or a minus.

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3 years ago

A construction crew is lengthening a road. The crew is adding 6 miles to the road each week. The road originally measured 52 mil

PSYCHO15rus [73]

6x + 52 > 130

Subtract 52 from both sides:

6x > 78

Divide both sides by 6:

X > 78/6

X > 13

7 0

2 years ago

In a right triangle, the measure of one acute angle is 26°. What is the measure of the other acute angle?

Makovka662 [10]

The sum of the angles of a triangle ALWAYS sum up to 180 degrees. So to find the other angle, you would take 180, subtract 90, and then subtract 26, to get 64.
The measure of the 3rd angle equals 64.

5 0

2 years ago