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3 years ago

Find thee value of a2+b2

Mathematics

2 answers:

GaryK [48]3 years ago

6 0

Answer And Step-by-step Explanation :

a^2 + b^2 = (a + b)^2 - 2ab

gregori [183]3 years ago

4 0

Answer: 2a+2b

Step-by-step explanation:

If this is just algebra, then all you need to do is simplify the expression.

it is basically just:

a×a+b×b

So it is basically just: 2a+2b

I dunno if this is correct, but this is how I was taught. :)

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Which rigid transformation(s) can map ABC onto FED?

Savatey [412]

Answer:

reflection,then translation

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Kristen is 64 inches tall, and she stands 12 feet away from a streetlight. If she casts an 82-inch-long shadow, how tall is the

o-na [289]

Answer:

176.39 inches or

14.70 feet

Step-by-step explanation:

Consider the right triangle made by Kristen, ground and shadow.

This triangle has one leg as 64 inches.

Next consider the right triangle formed by street light, ground upto shadow tip.

The two triangles have common angle of elevation and also another angle as 90 degrees.

Hence the two triangles would be similar

Also if A is the angle made by hypotenuse of both triangles with the ground we have

$tanx=\frac{64}{82}$

This value also equals by bigger triangle as

$tanx=\frac{h}{82+12(12)}=\frac{h}{226}$

From these two we get

h = height of street light = $\frac{226(64)}{82} =176.39$

6 0

2 years ago

your manager believes that 43% of the company's orders come from first-time customers. A random sample of 98 orders will be used

Tpy6a [65]

Answer: 0.7030

Step-by-step explanation:

Given : The population proportion for company's orders come from first-time customers : p=0.43

Sample size : n= 98

The test statistic for population proportion:-

$z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

For , $\hat{p}=0.33$

$z=\dfrac{0.33-0.43}{\sqrt{\dfrac{0.43(1-0.43)}{98}}}\approx-2.00$

For , $\hat{p}=0.46$

$z=\dfrac{0.46-0.43}{\sqrt{\dfrac{0.43(1-0.43)}{98}}}\approx0.60$

$\text{The p-value =}P(-2.00$

Hence, the probability that the sample proportion is between 0.33 and 0.46 is 0.7030.

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3 years ago

Which of the following is equal to g(x)? A. 4(x – 2) B. 4(x + 2) C. 4x – 2 D. 4x + 2

SSSSS [86.1K]

It would probably be A

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2 years ago

Systems of equations

nikitadnepr [17]

The answer is that when ur doing systems of equations u have to work with it when u trynna get the answer

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2 years ago