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3 years ago

Help me please.I dont know what to do.like the negative number do i multipky or add

Mathematics

1 answer:

Delicious77 [7]3 years ago

6 0

to get the answer:

a(b-4)

multiply

use distributive property
ab+a*-4

answer=ab-4a

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The discriminant finds the

mafiozo [28]

Answer: The discriminant is the part of the quadratic formula underneath the square root symbol: b²-4ac. The discriminant tells us whether there are two solutions, one solution, or no solutions.

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3 years ago

Convert 5/6 hour to minutes 1 hour = 60 mins.

masya89 [10]

Answer:

50 minutes.

Step-by-step explanation:

We solve this question by proportions, using rule of three.

One hour is 60 minutes.

5/6 hour

This is:

$\frac{5}{6}*60 = \frac{5*60}{6} = 5*10 = 50$

50 minutes.

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3 years ago

Find the value of x to the nearest tenth

o-na [289]

As the sides shown are same so the base of large triangle is double the base of smaller triangle
That is
2(3x-8) =20
Divide both sides by 2
3x-8 = 10
Add 8 to both sides
3x =18
Divide both sides by 3
x=6

So answer is 6.0

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3 years ago

List the following numbers in order from least to greatest. 2.31,2.13,0.123,3.12

Zigmanuir [339]

Answer:

Step-by-step explanation:

0.123

2.13

2.31

3.12

That is least to greatest. I hope I answered your ?. Can you help me?

5 0

3 years ago

Read 2 more answers

In 2003, an organization surveyed 1,508 adult Americans and asked about a certain war, "Do you believe the United States made

Semmy [17]

Answer:

The confidence interval for the difference of proportions of the population p2003-p2008 is $0.31\leq\Delta \pi \leq 0.37$ .

Step-by-step explanation:

In this question we have to construct a 90% confidence interval (CI) for a difference of proportions.

The proportion for 2003 is $p_1=1085/1508=0.72$ .

The proportion for 2008 is $p_2=570/1508=0.38$ .

The difference in proportions is $\Delta p=p_1-p_2=0.72-0.38=0.34$ .

The standard deviation of the difference of proportions can be estimated as:

$s=\sqrt{\frac{p_1(1-p_1)}{n_1}+\frac{p_2(1-p_2)}{n_2} }=\sqrt{\frac{0.72(1-0.72)}{1508}+\frac{0.38(1-0.38)}{1508} }=\sqrt{0.00029} =0.017$

For a 90% CI, the z-value is 1.64.

Then we can construct the CI as

$\Delta p-z\sigma\leq\Delta \pi \leq\Delta p+z\sigma\\\\0.34-1.64*0.017\leq\Delta \pi \leq0.34+1.64*0.017\\\\ 0.34-0.03\leq\Delta \pi \leq0.34+0.03\\\\0.31\leq\Delta \pi \leq 0.37$

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3 years ago