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3 years ago

I need help please & thank you

Mathematics

2 answers:

White raven [17]3 years ago

5 0

3(2c+d)-4(c-d)+d^2

c=1 , d=3

Use the substitution method

3(2*1+3)-4(1-3)+3^2

Multiply the brackets

3(2+3)-4+12+9

6+9-4+12+9

15-4+12+9

11+21

=32

Answer: 32

kipiarov [429]3 years ago

5 0

Answer:

Step-by-step explanation:

3(2c + d) - 4(c - d) + d^2

Substitute c = 1 and d = 3:

3 * (2*1 + 3) - 4(1 - 3) + 3^2

= 3*5 - 4(-2) + 9

= 15 + 8 + 9

= 32.

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Step-by-step explanation:

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-1 is your answer.

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3 years ago

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3 years ago

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3 years ago

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A survey of 1 comma 558 randomly selected adults showed that 522 of them have heard of a new electronic reader. The accompanying

sineoko [7]

Answer with explanation:

Let p be the proportion of adults have heard of the new electronic reader.

Given claim : The accompanying technology display results from a test of the claim that 38% of adults have heard of the new electronic reader.

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Then , the set of hypothesis will be :-

$H_0: p=0.38\\\\H_a:p\neq0.38$

Since, the alternative hypothesis is two tailed , so the test is two-tailed test.

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So the sample proportion for adults have heard of the new electronic reader : $\hat{p}=\dfrac{522}{1558}\approx0.34$

The test statistic for proportion is given by :-

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3 years ago

Zane calculated the missing side length of one of these triangles using the Pythagorean Theorem. Which triangle is it?

topjm [15]

The pythagorean theorem states that for any RIGHT-ANGLED TRIANGLE, the relationship between the side lengths are A²+B²=C², where C is the hypotenuse :P

Which means that it can only be applied on right angled triangles~
So your answer would be B, a right-angled triangle.

Ask me if you are unsure about anything <3

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3 years ago

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