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2 years ago

Can someone please answer and explain thank you! I’ll mark brainliest

Mathematics

2 answers:

k0ka [10]2 years ago

6 0

Answer:

Step-by-step explanation:

You first multiply the a with bx and c then after the answer when you multiply you "add" with it would be something like

ex: 6x+4=28

- 4 -4 subtract both sides

------------------------

6x=24 then divide 6 with 24.

x= 3

ra1l [238]2 years ago

6 0

You first distribute by multiplying A by what is in the parentheses

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I dont know what I'm doing! could you help me

photoshop1234 [79]

Answer:

c = 24.34

Step-by-step explanation:

Here, we can use the cosine rule

Generally, we have this as:

a^2 = b^2 + c^2 - 2bcCos A

12^2 = 14^2 + c^2 - 2(14)Cos 19

144 = 196 + c^2 - 26.5c

c^2 - 26.5c + 196-144 = 0

c^2 - 26.5c + 52 = 0

We can use the quadratic formula here

and that is;

{-(-26.5) ± √(-26.5)^2 -4(1)(52)}/2

(26.5 + 22.23)/2 or (26.5 - 22.23)/2

24.37 or 2.135

By approximation c = 24.34 will be correct

8 0

3 years ago

Suppose that many large samples are taken from a population and that the

rewona [7]

Answer:

$0.22 -1 *0.029 =0.191$

$0.22 +1 *0.029 =0.249$

And the best option would be:

D. (0.191 to 0.249)

Step-by-step explanation:

For this case we know that the mean is:

$\bar X = 0.22$

And the standard error is given by:

$SE = 0.029$

We want to construct a 68% confidence interval so then the significance level would be :

$\alpha=1-0.68 = 0.32$ and $\alpha/2 =0.16$ . The confidence interval is given by:

$\bar X \pm z_{\alpha/2} SE$

Now we can find the critical value using the normal standard distribution and we got looking for a quantile who accumulate 0.16 of the area on each tail and we got:

$z_{\alpha/2}= 1$

And replacing we got:

$0.22 -1 *0.029 =0.191$

$0.22 +1 *0.029 =0.249$

And the best option would be:

D. (0.191 to 0.249)

5 0

2 years ago

Can any one help with y = 2x + 4

geniusboy [140]

Answer:

It's in the screenshot hope it helpsss

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

2+1.25f=10-2.75f2+1.25f=10−2.75f solve for f pls

krek1111 [17]

The answer to your question would be 2.

(please give thanks if i am correct)

4 0

3 years ago

Evaluate the expression when x=12,y=-3 and z=-2

Degger [83]

Answer:

(12)(3)(-2)

Step-by-step explanation:

5 0

3 years ago