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3 years ago

25 POINTS!!!! PLSSSS

Mathematics

2 answers:

Luba_88 [7]3 years ago

8 0

Answer:

The answer is C

Step-by-step explanation:

It is C because when you look at the other answers it is adding to sides that dont make a side at all, and C shows adding to sides that are equal you get another side. hope this helps.

Alona [7]3 years ago

5 0

Answer:

Step-by-step explanation:

Becuase I'm smart

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What expression has a value of 15 when x = 15

Vaselesa [24]

Answer:

I suppose 1x is a possible expression. The question confuses me because I feel like there are supposed to be other options

Step-by-step explanation:

4 0

3 years ago

1: 2(y+6)=? 2: 6-(-6+2)=? What is the property of equation?

Citrus2011 [14]

1: 2y+12

2: 6 +6 -2
+12 -2
= 10

5 0

4 years ago

If 3 tan θ = 1, then find the value of sin2 θ – cos2 θ.

vfiekz [6]

Answer:

sin2θ - cos2θ = 2sin² θ

Step-by-step explanation:

hello :

tan θ = 1 means : sinθ /cosθ so : sinθ =cosθ

sin2θ = 2sin θ cosθ =2sin² θ

cos2θ = cos²θ - sin²θ = sin²θ - sin²θ =0

sin2θ - cos2θ = 2sin² θ

4 0

3 years ago

A bag contains white marbles and blue marbles, 79 in total. the number of white marbles is 6 less than 4 times the number of blu

Annette [7]

Let x be the number of white marbles and y be the number of blue marbles.
So, $x+y=79$
Also, $x = 4y-6$ since "the number of white marbles is 6 less than 4 times the number of blue marbles"
We will solve the above system o two equation:
Using the value of x from the second equation in the first equation we get:
$(4y-6)+y=79\\5y=79+6\\5y=85\text{ then }y=\frac{85}{5}=17\\x=79-17=62$
Conclusion: there is 62 white marbles and 17 blue marbles.

7 0

4 years ago

What value of z* should be used to construct an 88% confidence interval of a population mean? Answer choices are rounded to the

nirvana33 [79]

Answer:

The answer is "1.555"

Step-by-step explanation:

In the given question choices were not defined som the correct answer to this question can be defined as follows:

Given:

The value of z* for 88% confidence interval are:

$\to \frac{Z_{\alpha}}{2} \\\\\to Z_{0.06}\\\\\to \boxed{1.555}$

8 0

3 years ago