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2 years ago

What is the answer to 1/4y=7

Mathematics

1 answer:

Alborosie2 years ago

8 0

Answer:

1.75

Step-by-step explanation:

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I need help with math thanks

Viktor [21]

The Last on = 45x^2 - 2x - 8

Reason being is because you would group and multiple:
(9x - 4) • (5x +2)

6 0

3 years ago

-5+14x+12=-91<br><br><br> with work plz

Alex777 [14]

14x+7=-91
-7=-91-7
14x=-98
*14 *14
x= -1372

4 0

2 years ago

A past survey of students taking a standardized test revealed that % of the students were planning on studying engineering in c

Angelina_Jolie [31]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The 95% confidence interval is $-0.00870$

Step-by-step explanation:

From the question we are told that

The first sample size is $n_1 = 1068000$

The first proportion $\r p_1 = 0.084$

The second sample size is $n_2 = 1476000$

The second proportion is $\r p_2 = 0.092$

Given that the confidence level is 95% then the level of significance is mathematically represented as

$\alpha = (100 - 95)\%$

$\alpha = 0.05$

From the normal distribution table we obtain the critical value of $\frac{ \alpha }{2}$ the value is

$Z_{\frac{\alpha }{2} } =z_c= 1.96$

Now using the formula from the question to construct the 95% confidence interval we have

$(\r p_1 - \r p_2 )- z_c \sqrt{ \frac{\r p_1 \r q_1 }{n_1} + \frac{\r p_2 \r q_2 }{n_2} }$

Here $\r q_1 = 1 - \r p_1$

=> $\r q_1 = 1 - 0.084$

=> $\r q = 0.916$

and

$\r q_2 = 1 - \r p_2$

=> $\r q_2 = 1 - 0.092$

=> $\r q_2 = 0.908$

$(0.084 - 0.092 )- (1.96)* \sqrt{ \frac{0.092* 0.916 }{1068000} + \frac{0.084* 0.908 }{1476000} }$

$-0.00870$

3 0

2 years ago

If f(x) = x^2 - 4x + 3, and the domain is {-2, 0, 1}, what is the range?

dangina [55]

Evaluate the function at the three values of the range and see what you get. The appropriate choice is ...

... D) {15, 3, 0}

_____

Evaluation can sometimes be simpler if you rearrange the function to a form called "Horner's form."

... f(x) = (x -4)x +3

Then the evaluation looks like (for x=-2) ...

... f(-2) = (-2-4)(-2)+3 = (-6)(-2) +3 = 12 +3 = 15

This is sufficient to identify D as the answer of choice.

5 0

2 years ago

What is 5/6-1/8 equal

4vir4ik [10]

Sorry if I'm wrong - This is how I learned to subtract fractions in the 7th grade

First, I would line up the fractions side-by-side:

5/6 1/8

Then, my teacher would tell me to look at the numerators and subtract those - The answer would be 4

Next, she would say to do the same to the denominators - The answer is 2

4/2 is your answer I believe

Hope this helped! :)

8 0

2 years ago