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Ludmilka [50]
4 years ago
13

PLS HELP ASAP!! What are the missing reasons in the proof?

Mathematics
1 answer:
horsena [70]4 years ago
7 0
The correct answer is A.
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Which of the following is a solution to the equation 4x2+4x−3=0?
Readme [11.4K]

Answer:

-1.5

Step-by-step explanation:

4x² + 4x - 3 = 0

(2x + 3)(2x - 1) = 0

2x + 3 = 0  or  2x - 1 = 0

x = -3/2   or x = 1/2

Answer: -1.5

6 0
3 years ago
Read 2 more answers
The mayor of a town has proposed a plan for the construction of a new community. A political study took a sample of 800 voters i
Hunter-Best [27]

Answer:

A political strategist wants to test the claim that the percentage of residents who favor construction is more than  30%, so then that represent our claim and needs to be on the alternative hypothesis.

Based on this the correct system of hypothesis are:

Null hypothesis: p \leq 0.3

Alternative hypothesis p >0.3

Step-by-step explanation:

We have the following info given from the problem:

n= 800 the random sample of voters selected from the town

\hat p = 0.34 represent the proportion of residents favored construction

p_o = 0.30 represent the value desired to test.

A political strategist wants to test the claim that the percentage of residents who favor construction is more than  30%, so then that represent our claim and needs to be on the alternative hypothesis.

Based on this the correct system of hypothesis are:

Null hypothesis: p \leq 0.3

Alternative hypothesis p >0.3

And in order to test this hypothesis we can use a one sample z test for a population proportion and the statistic would be given by:

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

And with the data given we have:

z=\frac{0.34 -0.3}{\sqrt{\frac{0.3(1-0.3)}{800}}}=2.469  

7 0
3 years ago
Ivania is 12 3 4 years old. Marian is 1 3 8 years older than Ivania and Jane is 1 1 5 years older than Marian. How old is Jane?
andre [41]

Answer:

Step-by-step explanation:

it says Jane is 115 years older than Marian it means that Jane is 253 years old

7 0
2 years ago
Select the expression equivalent to (-2x + 8.1y) - (-9x + 5.3y).
makvit [3.9K]
ANSWER
D.) 7x+2.8y

Hope this helped!
3 0
3 years ago
Write a linear function f with f(−9)=10 and f(−1)=−2
pashok25 [27]

First we need to find the slope of the function

The slope of a function is equal to

\frac{f(x_2)-f(x_1)}{x_2-x_1}

So now we plug this into the equation and find the slope (M will represent the slope)

m=\frac{10--2}{-9--1}\\m=\frac{12}{-8}\\m=-\frac{3}{2}

So the slope is -3/2


Now we can use point-slope form.

Point slope form is represented by

Y-Y_1=m(X-X_1)

So when we plug in our values we get

Y--2=-3/2(X--1)\\Y+2 = -3/2(X+1)\\Y+2 = -3/2X-3/2\\Y=-3/2X-7/2

So the equation is

Y = -3/2X-7/2

6 0
3 years ago
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